REGISTRATION RIGHTS AGREEMENT by and among EngilityCorporation, Engility Holdings Inc., the other Guarantors from time to time party thereto and Morgan Stanley &Co. LLC., Barclays Capital Inc., Deutsche Bank Securities Inc., J.P. Morgan Securities LLC, Regions Securities LLC, SunTrust Robinson Humphrey, Inc. and Jefferies LLC Dated as ofAugust 12, 2016 REGISTRATION RIGHTS AGREEMENT

Exhibit 4.3

EXECUTION VERSION

REGISTRATION RIGHTS AGREEMENT

by and among

Engility Corporation,

Engility Holdings Inc.,

the other Guarantors from time to time party thereto

and

Morgan Stanley & Co. LLC.,

Barclays Capital Inc., Deutsche Bank Securities Inc.,

J.P. Morgan Securities LLC, Regions Securities LLC,

SunTrust Robinson Humphrey, Inc. and

Jefferies LLC

Dated as of August 12, 2016

REGISTRATION RIGHTS AGREEMENT

This Registration Rights Agreement (this “Agreement”) is made and entered into as of August 12, 2016, by and among Engility Corporation, a Massachusetts corporation (the “Company”), a wholly-owned subsidiary of Engility Holdings, Inc., a Delaware corporation (“Holdings”), the other Guarantors party hereto (together with Holdings, collectively, the “Guarantors”) and Morgan Stanley & Co. LLC, as representative (the “Representative”) of the several initial purchasers named in Schedule I to the Purchase Agreement (collectively, the “Initial Purchasers”), each of whom has agreed to purchase the Company’s 8.875% Senior Notes due 2024 (the “Initial Notes”) fully and unconditionally guaranteed by the Guarantors (the “Guarantees”) pursuant to the Purchase Agreement (as defined below). The Initial Notes and the Guarantees attached thereto are herein collectively referred to as the “Initial Securities.”

This Agreement is made pursuant to the Purchase Agreement, dated August 12, 2016 (the “Purchase Agreement”), by and among the Company, the Guarantors and the Initial Purchasers (i) for the benefit of the Initial Purchasers and (ii) for the benefit of the holders from time to time of the Initial Securities, including the Initial Purchasers. In order to induce the Initial Purchasers to purchase the Initial Securities, the Company has agreed to provide the registration rights set forth in this Agreement. The execution and delivery of this Agreement is a condition to the obligations of the Initial Purchasers set forth in Section 5(h) of the Purchase Agreement.

The parties hereby agree as follows:

SECTION 1. Definitions. As used in this Agreement, the following capitalized terms shall have the following meanings:

Additional Interest: As defined in Section 5 hereof.

Additional Interest Payment Date: With respect to the Initial Securities, each Interest Payment Date.

Blackout Period: As defined in Section 4(a) hereof.

Broker-Dealer: Any broker or dealer registered under the Exchange Act.

Business Day: Any day other than a Saturday, Sunday or U.S. federal holiday or a day on which banking institutions or trust companies located in New York, New York are authorized or obligated to be closed.

Closing Date: The date of this Agreement.

Commission: The Securities and Exchange Commission.

Consummate: A registered Exchange Offer shall be deemed “Consummated” for purposes of this Agreement upon the occurrence of (i) the filing and effectiveness under the Securities Act of the Exchange Offer Registration Statement relating to the Exchange Securities to be issued in the Exchange Offer, (ii) the maintenance of such Registration Statement continuously effective and the keeping of the Exchange Offer open for a period not less than the minimum period required pursuant to Section 3(b) hereof, and (iii) the delivery by the Company to the Registrar under the Indenture of Exchange Securities in the same aggregate principal amount as the aggregate principal amount of Initial Securities that were tendered by Holders thereof pursuant to the Exchange Offer.

Exchange Act: The Securities Exchange Act of 1934, as amended, including the rules and regulations promulgated thereunder.

Exchange Offer: The registration by the Company under the Securities Act of the Exchange Securities pursuant to a Registration Statement pursuant to which the Company offers the Holders of all outstanding Transfer Restricted Securities the opportunity to exchange all such outstanding Transfer Restricted Securities held by such Holders for Exchange Securities in an aggregate principal amount equal to the aggregate principal amount of the Transfer Restricted Securities tendered in such exchange offer by such Holders.

Exchange Offer Registration Statement: The Registration Statement relating to the Exchange Offer, including the related Prospectus.

Exchange Securities: The 8.875% Senior Notes due 2024, of the same series under the Indenture as the Initial Notes and the Guarantees attached thereto, to be issued to Holders in exchange for Transfer Restricted Securities pursuant to this Agreement.

FINRA: Financial Industry Regulatory Authority.

Free Writing Prospectus: Each free writing prospectus (as defined in Rule 405 under the Securities Act) prepared by or on behalf of the Company or used or referred to by the Company in connection with the sale of the Initial Securities or the Exchange Securities.

Holders: As defined in Section 2(b) hereof.

Indenture: The Indenture, dated as of August 12, 2016, by and among the Company, the Guarantors and Deutsche Bank Trust Company Americas, as trustee (the “Trustee”), pursuant to which the Securities are to be issued, as such Indenture is amended or supplemented from time to time in accordance with the terms thereof.

Initial Purchasers: As defined in the preamble hereto.

Initial Notes: As defined in the preamble hereto.

Initial Securities: As defined in the preamble hereto.

Interest Payment Date: As defined in the Indenture and the Initial Securities.

Person: An individual, partnership, corporation, trust or unincorporated organization, or a government or agency or political subdivision thereof.

Prospectus: The prospectus included in a Registration Statement, as amended or supplemented by any prospectus supplement and by all other amendments thereto, including post-effective amendments, and all material incorporated by reference into such Prospectus.

Registration Default: As defined in Section 5 hereof.

Registration Statement: Any registration statement of the Company relating to (a) an offering of Exchange Securities pursuant to an Exchange Offer or (b) the registration for resale of Transfer Restricted Securities pursuant to the Shelf Registration Statement, which is filed pursuant to the provisions of this Agreement, in each case, including the Prospectus included therein, all amendments and supplements thereto (including post-effective amendments) and all exhibits and material incorporated by reference therein.

-2-

Securities: The Initial Securities and the Exchange Securities.

Securities Act: The Securities Act of 1933, as amended, including the rules and regulations promulgated thereunder.

Shelf Registration Statement: As defined in Section 4(a) hereof.

Transfer Restricted Securities: Each Initial Security, until the earliest to occur of (a) the date on which such Initial Security is exchanged in the Exchange Offer for an Exchange Security entitled to be resold to the public by the Holder thereof without complying with the prospectus delivery requirements of the Securities Act, (b) the date on which such Initial Security has been effectively registered under the Securities Act and disposed of in accordance with a Shelf Registration Statement, (c) the date on which such Initial Security is distributed to the public by a Broker-Dealer pursuant to the “Plan of Distribution” contemplated by the Exchange Offer Registration Statement (including delivery of the Prospectus contained therein), or (d) the date upon which no Initial Security or Exchange Security (that is not entitled to be resold to the public without complying with the prospective delivery requirements of the Security Act) is outstanding for purposes of the Indenture governing such Initial Security and Exchange Security, if any.

Trust Indenture Act: The Trust Indenture Act of 1939, as amended.

Underwritten Registration or Underwritten Offering: A registration in which securities of the Company are sold to an underwriter for reoffering to the public.

SECTION 2. Securities Subject to this Agreement.

(a) Transfer Restricted Securities. The securities entitled to the benefits of this Agreement are the Transfer Restricted Securities.

(b) Holders of Transfer Restricted Securities. A Person is deemed to be a holder of Transfer Restricted Securities (each, a “Holder”) whenever such Person owns Transfer Restricted Securities.

SECTION 3. Registered Exchange Offer.

(a) Unless the Exchange Offer shall not be permissible under applicable law or Commission policy (after the procedures set forth in Section 6(a) hereof have been complied with), each of the Company and the Guarantors shall use its commercially reasonable efforts to (i) cause to be filed with the Commission, a Registration Statement under the Securities Act relating to the Exchange Securities and the Exchange Offer, (ii) use its commercially reasonable efforts to cause such Registration Statement to become effective not later than 365 days after the Closing Date, and (iii) in connection with the foregoing, file (A) all pre-effective amendments to such Registration Statement as may be necessary in order to cause such Registration Statement to become effective, (B) if applicable, a post-effective amendment to such Registration Statement pursuant to Rule 430A under the Securities Act and (C) cause all necessary filings in connection with the registration and qualification of the Exchange Securities to be made under the state securities or blue sky laws of such jurisdictions as are necessary to permit Consummation of the Exchange Offer, and (iv) upon the effectiveness of such Registration Statement, commence the Exchange Offer. The Exchange Offer shall be on the appropriate form permitting registration of the Exchange Securities to be offered in exchange for the Transfer Restricted Securities and to permit resales of Initial Securities held by Broker-Dealers as contemplated by Section 3(d) hereof.

-3-

(b) If an Exchange Offer Registration Statement is required to be filed and declared effective pursuant to Section 3(a) hereto, the Company and the Guarantors shall use commercially reasonable efforts to cause the Exchange Offer Registration Statement to be effective continuously and shall keep the Exchange Offer open for a period of not less than the minimum period required under applicable federal and state securities laws to Consummate the Exchange Offer; provided, however, that in no event shall such period be less than 20 Business Days after the date notice of the Exchange Offer is mailed to the Holders.

(c) The Company shall cause the Exchange Offer to comply with all applicable federal and state securities laws. No securities other than the Exchange Securities shall be included in the Exchange Offer Registration Statement. The Company shall use its commercially reasonable efforts to cause the Exchange Offer to be Consummated on the earliest practicable date after the Exchange Offer Registration Statement has become effective, but in no event later than 365 days after the Closing Date (or if such 365th day is not a Business Day, the next succeeding Business Day).

(d) The Company shall indicate in a “Plan of Distribution” or similar section contained in the Prospectus forming a part of a required Exchange Offer Registration Statement that any Broker-Dealer who holds Initial Securities that are Transfer Restricted Securities and that were acquired for its own account as a result of market-making activities or other trading activities (other than Transfer Restricted Securities acquired directly from the Company), may exchange such Initial Securities pursuant to the Exchange Offer; however, such Broker-Dealer may be deemed to be an “underwriter” within the meaning of the Securities Act and must, therefore, deliver a prospectus meeting the requirements of the Securities Act in connection with any resales of the Exchange Securities received by such Broker-Dealer in the Exchange Offer, which prospectus delivery requirement may be satisfied by the delivery by such Broker-Dealer of the Prospectus contained in the Exchange Offer Registration Statement. Such “Plan of Distribution” or similar section shall also contain all other information with respect to such resales by Broker-Dealers that the Commission may require in order to permit such resales pursuant thereto, but such “Plan of Distribution” or similar section shall not name any such Broker-Dealer or disclose the amount of Initial Securities held by any such Broker-Dealer except to the extent required by the Commission as a result of a change in policy after the date of this Agreement. The Company and the Guarantors further agree that the Broker-Dealer shall be authorized to deliver such Prospectus (or, to the extent permitted by law, make available) during such period in connection with the resales contemplated by this Section 3.

Each of the Company and the Guarantors shall use their commercially reasonable efforts to keep the Exchange Offer Registration Statement continuously effective, supplemented and amended as required by the provisions of Section 6(c) hereof to the extent necessary to ensure that it is available for resales of Initial Securities acquired by Broker-Dealers for their own accounts as a result of market-making activities or other trading activities, and to ensure that it conforms with the requirements of this Agreement, the Securities Act and the policies, rules and regulations of the Commission as announced from time to time, for a period ending on the earlier of (i) 180 days from the date on which the Exchange Offer Registration Statement is declared effective and (ii) the date on which no Broker-Dealer is required to deliver a prospectus in connection with market-making or other trading activities.

The Company shall provide sufficient copies of the latest version of such Prospectus to Broker-Dealers promptly upon reasonable request at any time during such 180-day (or shorter as provided in the foregoing sentence) period in order to facilitate such resales.

-4-

SECTION 4. Shelf Registration.

(a) Shelf Registration. If (i) the Company and the Guarantors are not required to file an Exchange Offer Registration Statement or to consummate the Exchange Offer because the Exchange Offer is not permitted by applicable law or Commission policy (after the procedures set forth in Section 6(a) hereof have been complied with), (ii) for any reason the Exchange Offer is not Consummated within 365 days after the Closing Date (or if such 365th day is not a Business Day, the next succeeding Business Day), or (iii) with respect to any Holder of Transfer Restricted Securities (A) such Holder is prohibited by applicable law or Commission policy from participating in the Exchange Offer, or (B) such Holder may not resell the Exchange Securities acquired by it in the Exchange Offer to the public without delivering a prospectus and that the Prospectus contained in the Exchange Offer Registration Statement is not appropriate or available for such resales by such Holder, or (C) such Holder is a Broker-Dealer and holds Initial Securities acquired directly from the Company or one of its affiliates, and such Holder notifies the Company within 30 days after the later of the Exchange Offer Registration Statement being filed and the date such holder becomes aware of such restrictions (but in any event, no later than 30 days after the Consummation of the Exchange Offer), the Company and the Guarantors shall use their commercially reasonable efforts to: cause to be filed a shelf registration statement pursuant to Rule 415 under the Securities Act (or designate an existing shelf registration statement), which may be an amendment to the Exchange Offer Registration Statement (in either event, the “Shelf Registration Statement”), which Shelf Registration Statement shall provide for resales of all Transfer Restricted Securities the Holders of which shall have provided the information required pursuant to Section 4(b) hereof; and cause such Shelf Registration Statement to be declared effective as promptly as practicable after the filing of such Shelf Registration Statement.

Each of the Company and the Guarantors shall use its commercially reasonable efforts to cause such Shelf Registration Statement to be continuously effective, supplemented and amended as required by the provisions of Sections 6(b) and (c) hereof to the extent necessary to ensure that it is available for resales of Initial Securities by the Holders of Transfer Restricted Securities entitled to the benefit of this Section 4(a), and to ensure that it conforms with the requirements of this Agreement, the Securities Act and the policies, rules and regulations of the Commission as announced from time to time, for a period of at least one year following the effective date of such Shelf Registration Statement (or shorter period that will terminate when all the Initial Securities covered by such Shelf Registration Statement have been sold pursuant to such Shelf Registration Statement or cease to be restricted securities under Rule 144); provided, however, that the Company and the Guarantors may, for a period (a “Blackout Period”) of up to 60 days in any three-month period, not to exceed 90 days in any twelve-month period, delay or suspend the use of the Prospectus contained in the Shelf Registration Statement if the Board of Directors of Holdings reasonably determines that the filing of any such Shelf Registration Statement or the continuing effectiveness thereof is not usable under circumstances relating to corporate developments, public filings with the Commission and similar events.

(b) Provision by Holders of Certain Information in Connection with the Shelf Registration Statement. No Holder of Transfer Restricted Securities may include any of its Transfer Restricted Securities in any Shelf Registration Statement pursuant to this Agreement unless and until such Holder furnishes to the Company in writing, within 15 Business Days after receipt of a request therefor, such information as the Company may reasonably request for use in connection with any Shelf Registration Statement or Prospectus or preliminary Prospectus included therein. Each Holder as to which any Shelf Registration Statement is being effected agrees to furnish promptly to the Company all information required to be disclosed in order to make the information previously furnished to the Company by such Holder true and correct in all material respects and not materially misleading.

-5-

SECTION 5. Additional Interest. If (i) the Exchange Offer has not been consummated within 365 days after the Closing Date (or if such 365th day is not a Business Day, the next succeeding Business Day) (or, if required by this Agreement, the Shelf Registration Statement is not declared effective by the Commission on or prior to the date that is 365 days after the Closing Date (or if such 365th day is not a Business Day, the next succeeding Business Day)) or (ii) any Registration Statement required by this Agreement is filed and declared effective but, subject to the Blackout Period, shall thereafter cease to be effective or fail to be usable for its intended purpose without being succeeded promptly by a post-effective amendment to such Registration Statement that cures such failure and that is itself promptly declared effective and, subject to the Blackout Period, such failure to remain effective or usable occurs on more than two occasions or exists for more than 45 days (whether or not consecutive), in either case, in any 12-month period (each such event referred to in clauses (i) through (ii), a “Registration Default”), the Company hereby agrees that the interest rate borne by the Transfer Restricted Securities shall be increased by 0.25% per annum during the 90-day period immediately following the occurrence of any Registration Default and shall increase by 0.25% per annum at the end of each subsequent 90-day period, but in no event shall such increase exceed 1.00% per annum (the “Additional Interest”). Following the cure of all Registration Defaults relating to any particular Transfer Restricted Securities, the interest rate borne by the relevant Transfer Restricted Securities will be reduced to the original interest rate borne by such Transfer Restricted Securities; provided, however, that, if after any such reduction in interest rate, a different Registration Default occurs, the interest rate borne by the relevant Transfer Restricted Securities shall again be increased pursuant to the foregoing provisions; provided, further, that, the Company shall in no event be required to pay Additional Interest for more than one Registration Default at any given time.

SECTION 6. Registration Procedures.

(a) Exchange Offer Registration Statement. In connection with the Exchange Offer, if required pursuant to Section 3(a) hereto, the Company and the Guarantors shall comply with all of the provisions of Section 6(c) hereof and shall use their commercially reasonable efforts to effect such exchange to permit the sale of Transfer Restricted Securities being sold in accordance with the intended method or methods of distribution thereof.

As a condition to its participation in the Exchange Offer pursuant to the terms of this Agreement, each Holder of Transfer Restricted Securities shall furnish, upon the request of the Company, prior to the Consummation thereof, a written representation to the Company (which may be contained in the letter of transmittal contemplated by the Exchange Offer Registration Statement) to the effect that (A) it is not an affiliate of the Company, (B) it is not engaged in, and does not intend to engage in, and has no arrangement or understanding with any Person to participate in, a distribution of the Exchange Securities to be issued in the Exchange Offer and (C) it is acquiring the Exchange Securities in its ordinary course of business. In addition, all such Holders of Transfer Restricted Securities shall otherwise cooperate in the Company’s preparations for the Exchange Offer. Each Holder hereby acknowledges and agrees that any Broker-Dealer and any such Holder using the Exchange Offer to participate in a distribution of the securities to be acquired in the Exchange Offer (1) could not under Commission policy as in effect on the date of this Agreement rely on the position of the Commission enunciated in Morgan Stanley and Co., Inc. (available June 5, 1991) and Exxon Capital Holdings Corporation (available May 13, 1988), as interpreted in the Commission’s letter to Shearman & Sterling dated July 2, 1993, and similar no-action letters, and (2) must comply with the registration and prospectus delivery requirements of the Securities Act in connection with a secondary resale transaction and that such a secondary resale transaction should be covered by an effective registration statement containing the selling security holder information required by Item 507 or 508, as applicable, of Regulation S-K if the resales are of Exchange Securities obtained by such Holder in exchange for Initial Securities acquired by such Holder directly from the Company.

-6-

(b) Shelf Registration Statement. If required pursuant to Section 4 hereto, in connection with the Shelf Registration Statement, each of the Company and the Guarantors shall comply with all applicable provisions of Section 6(c) hereof and shall use its commercially reasonable efforts to effect such registration to permit the sale of the Transfer Restricted Securities being sold in accordance with the intended method or methods of distribution thereof, and pursuant thereto each of the Company and the Guarantors will, in accordance with Section 4 hereof, prepare and file with the Commission a Registration Statement relating to the registration on any appropriate form under the Securities Act, which form shall be available for the sale of the Transfer Restricted Securities in accordance with the intended method or methods of distribution thereof.

(c) General Provisions. In connection with any Registration Statement and any Prospectus required by this Agreement to permit the sale or resale of Transfer Restricted Securities (including, without limitation, any Registration Statement and the related Prospectus required to permit resales of Initial Securities by Broker-Dealers), each of the Company and the Guarantors shall:

(i) use its commercially reasonable efforts to keep such Registration Statement continuously effective and provide all requisite financial statements (including, if required by the Securities Act or any regulation thereunder, financial statements of the Guarantors) for the period specified in Section 3 or 4 hereof, as applicable; upon the occurrence of any event that would cause any such Registration Statement or the Prospectus contained therein or any Free Writing Prospectus (A) to contain a material misstatement or omission or (B) not to be effective and usable for resale of Transfer Restricted Securities during the period required by this Agreement, the Company shall file promptly an appropriate amendment to such Registration Statement, in the case of clause (A), correcting any such misstatement or omission, and, in the case of either clause (A) or (B), use its commercially reasonable efforts to cause such amendment to be declared effective and such Registration Statement and the related Prospectus or such Free Writing Prospectus to become usable for their intended purpose(s) as soon as practicable thereafter;

(ii) use its commercially reasonable efforts to prepare and file with the Commission such amendments and post-effective amendments to the applicable Registration Statement as may be necessary to keep the Registration Statement effective for the applicable period set forth in Section 3 or 4 hereof, as applicable, or such shorter period as will terminate when all Transfer Restricted Securities covered by such Registration Statement have been sold; cause the Prospectus to be supplemented by any required Prospectus supplement, and as so supplemented to be filed pursuant to Rule 424 under the Securities Act, and to comply fully with the applicable provisions of Rules 424 and 430A under the Securities Act in a timely manner; cause any Free Writing Prospectus to be supplemented if required by the Securities Act; and comply with the provisions of the Securities Act with respect to the disposition of all securities covered by such Registration Statement during the applicable period in accordance with the intended method or methods of distribution by the sellers thereof set forth in such Registration Statement or supplement to the Prospectus or such Free Writing Prospectus;

(iii) advise the underwriter(s), if any, and selling Holders named in any Registration Statement promptly and, if requested by such Persons, to confirm such advice in writing, (A) when the Prospectus, any Prospectus supplement or post-effective amendment or any Free Writing Prospectus or supplement thereto has been filed, and, with respect to any Registration Statement or any post-effective amendment thereto, when the same has become effective, (B) of any request by the Commission for amendments to the Registration Statement or amendments or supplements to the Prospectus or any Free Writing Prospectus for additional information relating thereto, (C) of the issuance by the Commission of any stop order suspending the effectiveness of the Registration Statement under the Securities Act or of the suspension by any state securities commission of the qualification of the Transfer Restricted Securities for offering or sale in any jurisdiction, or the initiation of any proceeding for any of the preceding purposes, and (D) of the

-7-

existence of any fact or the happening of any event during the period a Registration Statement is effective that makes any statement of a material fact made in the Registration Statement, the Prospectus, any Free Writing Prospectus, any amendment or supplement thereto, any document incorporated by reference therein, untrue, or that requires the making of any additions to or changes in the Registration Statement, the Prospectus or any Free Writing Prospectus in order to make the statements therein not misleading. If at any time the Commission shall issue any stop order suspending the effectiveness of the Registration Statement, or any state securities commission or other regulatory authority shall issue an order suspending the qualification or exemption from qualification of the Transfer Restricted Securities under state securities or blue sky laws, each of the Company and the Guarantors shall use its commercially reasonable efforts to obtain the withdrawal or lifting of such order at the earliest possible time;

(iv) furnish without charge to each of the Initial Purchasers, each selling Holder named in any Registration Statement, and each of the underwriter(s), if any, prior to the filing thereof, copies of any Registration Statement or any Prospectus included therein or any Free Writing Prospectus or any amendments or supplements to any such Registration Statement, Prospectus or Free Writing Prospectus, and the Company will not file any such Registration Statement, Prospectus or Free Writing Prospectus or any amendment or supplement to any such Registration Statement, Prospectus or Free Writing Prospectus (in each case, excluding documents incorporated or deemed to be incorporated by referenced and exhibits unless specifically requested by such Initial Purchaser or Holder, as the case may be) to which an Initial Purchaser of Transfer Restricted Securities covered by such Registration Statement, any such Holder or the underwriter(s), if any, shall reasonably object in writing within two Business Days after the receipt thereof (such objection to be deemed timely made upon confirmation of telecopy transmission within such period). The objection of an Initial Purchaser, a Holder or an underwriter, if any, shall be deemed to be reasonable if such Registration Statement, amendment, Prospectus, Free Writing Prospectus, or supplement, as applicable, as proposed to be filed, contains a material misstatement or omission;

(v) to the extent any Free Writing Prospectus is used, file with the Commission any Free Writing Prospectus that is required to be filed by the Company or the Guarantors with the Commission in accordance with the Securities Act and to retain any Free Writing Prospectus not required to be filed;

(vi) in connection with a Shelf Registration Statement, make available, subject to customary confidentiality arrangements and at the offices where normally kept, at reasonable times for inspection solely for due diligence purposes by the Initial Purchasers, the managing underwriter(s), if any, participating in any disposition pursuant to such Registration Statement and any attorney or accountant retained by such Initial Purchasers or any of the underwriter(s), all pertinent financial and other records, pertinent corporate documents and properties of each of the Company and the Guarantors as such Person shall reasonably request in writing and cause the Company’s and the Guarantors’ officers, directors and employees to supply all information reasonably requested by any such Holder, underwriter, attorney or accountant in connection with such Registration Statement or any post-effective amendment thereto subsequent to the filing thereof and prior to its effectiveness and to participate in meetings with investors to the extent reasonably requested by the managing underwriter(s), if any;

(vii) if reasonably requested by any selling Holders or the underwriter(s), if any, promptly incorporate in any Registration Statement or Prospectus, pursuant to a Free Writing Prospectus, supplement or post-effective amendment if necessary, such information as such selling Holders and underwriter(s), if any, may reasonably request to have included therein, including,

-8-

without limitation, information relating to the “Plan of Distribution” of the Transfer Restricted Securities, information with respect to the principal amount of Transfer Restricted Securities being sold to such underwriter(s), the purchase price being paid therefor and any other terms of the offering of the Transfer Restricted Securities to be sold in such offering; provided, however, that the Company shall not be required to include any such information upon the request of any Holder or any underwriter if the inclusion of such information would, in the good faith judgment of the Company, violate the Securities Act or the Exchange Act; and make all required filings of such Prospectus supplement, post-effective amendment or Free Writing Prospectus as soon as practicable after the Company is notified of the matters to be incorporated in such Prospectus supplement, post-effective amendment or Free Writing Prospectus; provided, that the Company shall not be required to make more than two such filings on behalf of the Holders in any 30 day period;

(viii) furnish to each Initial Purchaser, each selling Holder and each of the underwriter(s), if any, upon request and without charge, one copy of the Registration Statement, as first filed with the Commission, and of each amendment thereto, including financial statements and schedules, and, if requested, all documents incorporated by reference therein and all exhibits (including exhibits incorporated therein by reference), unless such documents are available on the Commission’s EDGAR or similar system;

(ix) deliver to each selling Holder and each of the underwriter(s), if any, without charge, as many copies of the Prospectus (including each preliminary prospectus), any Free Writing Prospectus and any amendment or supplement thereto as such Persons reasonably may request; subject to Section 6(d) hereof, each of the Company and the Guarantors hereby consents to the use of the Prospectus, any Free Writing Prospectus and any amendment or supplement thereto by each of the selling Holders and each of the underwriter(s), if any, in connection with the offering and the sale of the Transfer Restricted Securities covered by the Prospectus, any Free Writing Prospectus or any amendment or supplement thereto;

(x) enter into such customary agreements (including an underwriting agreement), and make such customary representations and warranties, and take all such other reasonable actions in connection therewith as are customary in order to expedite or facilitate the disposition of the Transfer Restricted Securities pursuant to any Shelf Registration Statement contemplated by this Agreement, all to such extent as may be reasonably requested by any Initial Purchaser or by any Holder of Transfer Restricted Securities or underwriter in connection with any sale or resale pursuant to any Shelf Registration Statement contemplated by this Agreement; and each of the Company and the Guarantors shall furnish to each Initial Purchaser, each selling Holder and each underwriter, if any, in such substance and scope as they may reasonably request and as are customarily made by issuers to underwriters in primary underwritten offerings, upon the date of the effectiveness of the Shelf Registration Statement:

(A) a certificate, dated the date of effectiveness of the Shelf Registration Statement, signed by (y) the President or any Vice President and (z) a principal financial or accounting officer of each of the Company and the Guarantors, confirming, as of the date thereof, the matters set forth in paragraphs (i), (ii) and (iii) of Section 5(c) of the Purchase Agreement and such other customary matters as such parties may reasonably request;

(B) solely with respect to an Underwritten Offering, an opinion of counsel for the Company and the Guarantors (which opinions, in form, scope and substance shall be reasonably satisfactory to the selling Holders and such underwriters and their respective counsel) addressed to each selling Holder and underwriter of Transfer Restricted Securities, covering the matters customarily covered in opinions requested in underwritten offerings; and

-9-

(C) solely with respect to an Underwritten Offering, a customary comfort letter from the independent registered public accountants of the Company addressed to each selling Holder and underwriter, such letters to be in customary form and substance and covering matters of the type customarily covered in comfort letters in connection with underwritten offerings;

(xi) prior to any public offering of Transfer Restricted Securities, use its commercially reasonable efforts to cooperate with the selling Holders identified in the Registration Statement, the underwriter(s), if any, and their respective counsel in connection with the registration and qualification of the Transfer Restricted Securities under the state securities or blue sky laws of such jurisdictions as the selling Holders or underwriter(s), if any, may reasonably request in writing and do any and all other acts or things reasonably necessary or advisable to enable the disposition in such jurisdictions of the Transfer Restricted Securities covered by the Shelf Registration Statement; provided, however, that none of the Company or the Guarantors shall be required to (i) register or qualify as a foreign corporation or other entity or as a dealer in securities in any such jurisdiction where it is not then so qualified, (ii) file any general consent to service of process any such jurisdiction where it is not then subject, (iii) take any action that would subject it to the service of process in suits or to taxation in any jurisdiction where it is not then so subject, or (iv) make any change to its charter or by-laws or similar organizational documents;

(xii) to the extent permitted by law and the Indenture, use commercially reasonable efforts to issue, upon the request of any Holder of Initial Securities covered by the Shelf Registration Statement, Exchange Securities having an aggregate principal amount equal to the aggregate principal amount of Initial Securities surrendered to the Company by such Holder in exchange therefor or being sold by such Holder; such Exchange Securities to be registered in the name of such Holder or in the name of the purchaser(s) of such Securities, as the case may be; in return, the Initial Securities held by such Holder shall be surrendered to the Company for cancellation;

(xiii) to the extent Transfer Restricted Securities are held in certificated form, cooperate with the selling Holders and the underwriter(s), if any, to facilitate the timely preparation and delivery of certificates representing Transfer Restricted Securities to be sold and not bearing any restrictive legends; and enable such Transfer Restricted Securities to be in such denominations and registered in such names as the Holders or the underwriter(s), if any, may request at least two Business Days prior to any sale of Transfer Restricted Securities made by such Holders or underwriter(s);

(xiv) use its commercially reasonable efforts to cause the Transfer Restricted Securities covered by the Registration Statement to be registered with or approved by such other governmental agencies or authorities as may be necessary to enable the seller or sellers thereof or the underwriter(s), if any, to consummate the disposition of such Transfer Restricted Securities, subject to the proviso contained in Section 6(c)(xii) hereof;

(xv) if any fact or event contemplated by Section 6(c)(iii)(D) hereof shall exist or have occurred, use its commercially reasonable efforts to, prepare a supplement or post-effective amendment to the Registration Statement, related Prospectus or any Free Writing Prospectus or any document incorporated therein by reference or file any other required document so that, as thereafter delivered (or, to the extent permitted by law, made available) to the purchasers of Transfer Restricted Securities, the Prospectus and any Free Writing Prospectus will not contain an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein not misleading;

-10-

(xvi) provide a CUSIP number for all Securities not later than the effective date of the Registration Statement covering such Securities and provide the Trustee under the Indenture with printed certificates for such Securities which are in a form eligible for deposit with The Depository Trust Company and take all other action necessary to ensure that all such Securities are eligible for deposit with The Depository Trust Company;

(xvii) use commercially reasonable efforts to cooperate and assist in any filings required to be made with FINRA and in the performance of any customary due diligence investigation by any underwriter (including any “qualified independent underwriter”) that is required to be retained in accordance with the rules and regulations of FINRA;

(xviii) otherwise use its commercially reasonable efforts to comply with all applicable rules and regulations of the Commission, and make generally available to its security holders, a consolidated earnings statement satisfying the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder (or any similar rule promulgated under the Securities Act) no later than 45 days after the end of any fiscal quarter (or 90 days after the end of any 12-month period if such period is a fiscal year) (A) commencing at the end of any fiscal quarter in which Transfer Restricted Securities are sold to underwriters in a firm commitment or commercially reasonable efforts Underwritten Offering or (B) if not sold to underwriters in such an offering, commencing on the first date of the first fiscal quarter of the Company, after the effective date of the Registration Statement, which statements shall cover said 12-month periods; provided, that this requirement shall be deemed satisfied by complying with the applicable reporting covenant in the Indenture; and

(xix) use commercially reasonable efforts to cause the Indenture to be qualified under the Trust Indenture Act not later than the effective date of the first Registration Statement required by this Agreement, and, in connection therewith, cooperate with the Trustee and the Holders of Securities to effect such changes to the Indenture as may be required for such Indenture to be so qualified in accordance with the terms of the Trust Indenture Act; and to execute and use its commercially reasonable efforts to cause the Trustee to execute all documents that may be required to effect such changes and all other forms and documents required to be filed with the Commission to enable the Indenture to be so qualified in a timely manner.

(d) Each Holder agrees by acquisition of a Transfer Restricted Security that, upon receipt of any notice from the Company of the existence of any fact of the kind described in Section 6(c)(iii)(C), (D) or (E) hereof, such Holder will forthwith discontinue disposition of Transfer Restricted Securities pursuant to the applicable Registration Statement until such Holder’s receipt of the copies of the supplemented or amended Prospectus or Free Writing Prospectus contemplated by Section 6(c)(xvi) hereof, or until it is advised in writing (the “Advice”) by the Company that the use of the Prospectus or Free Writing Prospectus may be resumed, and has received copies of any additional or supplemental filings that are incorporated by reference in the Prospectus or Free Writing Prospectus. If so directed by the Company, each Holder will deliver to the Company (at the Company’s expense) all copies then in such Holder’s possession, other than permanent file copies, of the Prospectus covering such Transfer Restricted Securities and Free Writing Prospectus that was current at the time of receipt of such notice. In the event the Company shall give any such notice, the time period regarding the effectiveness of such Registration Statement set forth in Section 3 or 4 hereof, as applicable, shall be extended by the number of days during the period from and including the date of the giving of such notice to and including the date when each selling Holder

-11-

covered by such Registration Statement shall have received the copies of the supplemented or amended Prospectus or Free Writing Prospectus contemplated by Section 6(c)(xvi) hereof or shall have received the Advice; provided, however, that no such extension shall be taken into account in determining whether Additional Interest is due pursuant to Section 5 hereof or the amount of such Additional Interest. Each Holder agrees to hold in confidence the fact that it has received notice pursuant to this paragraph and any communication related thereto.

SECTION 7. Registration Expenses.

(a) All expenses incident to the Company’s and the Guarantors’ performance of or compliance with this Agreement will be borne by the Company and the Guarantors, jointly and severally, regardless of whether a Registration Statement becomes effective, including, without limitation: (i) all registration and filing fees and expenses (including filings made by any Initial Purchaser or Holder with FINRA (and, if applicable, the fees and expenses of any “qualified independent underwriter” and its counsel that may be required by the rules and regulations of FINRA)); (ii) all fees and expenses of compliance with federal securities and state securities or blue sky laws; (iii) all expenses of printing (including printing certificates for the Exchange Securities to be issued in the Exchange Offer and printing of Prospectuses), messenger and delivery services and telephone; (iv) all fees and disbursements of counsel for the Company and the Guarantors and, in the case of a Shelf Registration Statement, the reasonable fees and disbursements of one counsel of all of the selling Holders (which counsel shall be Cahill Gordon & Reindel LLP or such other counsel as may be chosen by the Holders of a majority principal amount of the Transfer Restricted Securities for whose benefit such Shelf Registration Statement is being prepared); (v) all application and filing fees in connection with listing the Exchange Securities on a securities exchange or automated quotation system pursuant to the requirements thereof; and (vi) all fees and disbursements of independent certified public accountants of the Company and the Guarantors (including the expenses of any special audit and comfort letters required by or incident to such performance). Notwithstanding the foregoing, the Company and the Guarantors shall not be required to pay any underwriting or brokerage discounts or commissions, or the expenses referred to in Section 7(b) below.

Each of the Company and the Guarantors will, in any event, bear its internal expenses (including, without limitation, all salaries and expenses of its officers and employees performing legal or accounting duties), the expenses of any annual audit and the fees and expenses of any Person, including special experts, retained by the Company or the Guarantors.

(b) Except as specifically provided in Section 7(a) above, each Holder shall pay their own expenses in connection with the Company’s performance of its obligations under Sections 3, 4, 5 and 6 hereof, including the fees and disbursements of counsel (except as provided above in Section 7(a)) and any expenses incurred by Holders in connection with any “road show” and any other meetings with prospective investors.

SECTION 8. Indemnification.

(a) The Company and the Guarantors, jointly and severally, agree to indemnify and hold harmless (i) each Initial Purchaser, (ii) each Holder and (iii) the respective officers, directors and affiliates of any Initial Purchaser or Holder, or any Person, if any, who controls (within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act) any Initial Purchaser or Holder (any such Person being hereinafter referred to as a “controlling person”), to the fullest extent lawful, from and against any and all losses, claims, damages, liabilities and expenses (including, without limitation, any legal or other expenses reasonably incurred in connection with investigating or defending any such action or claim) arising out of or based upon any untrue statement or alleged untrue statement of a material fact contained in any Registration Statement, Prospectus or Free Writing Prospectus (or any amendment or supplement

-12-

thereto), or any omission or alleged omission to state therein a material fact necessary to make the statements therein (in the case of any such Prospectus or Free Writing Prospectus (or any amendment or supplement thereto), in light of the circumstances under which they were made) not misleading, except insofar as such losses, claims, damages or liabilities arise out of or are based upon any untrue statement or omission or alleged untrue statement or omission that is made in reliance upon and in conformity with information relating to any Initial Purchaser or any of the Holders furnished to the Company by such Initial Purchaser or Holder expressly for use therein. This indemnity agreement shall be in addition to any liability which the Company or any of the Guarantors may otherwise have.

(b) Each Holder of Transfer Restricted Securities agrees, severally and not jointly, to indemnify and hold harmless the Company, the Guarantors and their respective directors, their respective officers who sign a Registration Statement, and any Person controlling (within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act) the Company or any of the Guarantors, and the respective officers, directors, partners, employees, representatives and agents of each such Person, to the same extent as the indemnity set forth in paragraph (a) above, but only with respect to losses, claims, damages, and liabilities based on information relating to such Holder furnished by such Holder expressly for use in any Registration Statement, Prospectus, Free Writing Prospectus (or any amendment or supplement thereto).

(c) Promptly after receipt by an indemnified party under this Section 8 of notice of the commencement of any action, such indemnified party will, if a claim in respect thereof is to be made against an indemnifying party under this Section 8, notify the indemnifying party in writing of the commencement thereof; provided that the failure to so notify the indemnifying party will not relieve it from any liability which it may have to any indemnified party under this Section 8 except to the extent that it has been materially prejudiced by such failure (through the forfeiture of substantive rights and defenses) and shall not relieve the indemnifying party from any liability that the indemnifying party may have to an indemnified party other than under this Section 8. In case any such action is brought against any indemnified party and such indemnified party seeks or intends to seek indemnity from an indemnifying party, the indemnifying party will be entitled to participate in and, to the extent that it shall elect, jointly with all other indemnifying parties similarly notified, by written notice delivered to the indemnified party promptly after receiving the aforesaid notice from such indemnified party, to assume the defense thereof with counsel, at such indemnifying party’s expense, reasonably satisfactory to such indemnified party; provided, however, if the defendants in any such action include both the indemnified party and the indemnifying party and the indemnified party shall have reasonably concluded that a conflict may arise between the positions of the indemnifying party and the indemnified party in conducting the defense of any such action or that there may be legal defenses available to it and/or other indemnified parties which are different from or additional to those available to the indemnifying party, the indemnified party or parties shall have the right to select separate counsel to assume such legal defenses and to otherwise participate in the defense of such action on behalf of such indemnified party or parties. Upon receipt of notice from the indemnifying party to such indemnified party of such indemnifying party’s election so to assume the defense of such action and approval by the indemnified party of counsel, the indemnifying party will not be liable to such indemnified party under this Section 8 for any legal or other expenses subsequently incurred by such indemnified party in connection with the defense thereof other than reasonable costs of investigation unless (i) the indemnified party shall have employed separate counsel in accordance with the proviso to the immediately preceding sentence (it being understood, however, that the indemnifying party shall not be liable for the expenses of more than one separate counsel (together with local counsel (in each jurisdiction)), which shall be selected by the Representative (in the case of counsel representing the Initial Purchasers, the Holders or their respective related persons), representing the indemnified parties who are parties to such action), (ii) the indemnifying party shall not have employed counsel satisfactory to the indemnified party to represent the indemnified party within a reasonable time after notice of commencement of the action, in each of which cases the fees and expenses of counsel shall be at the expense of the indemnifying

-13-

party, or (iii) the indemnifying party and the indemnified party shall have mutually agreed to the contrary. The indemnifying party under this Section 8 shall not be liable for any settlement of any proceeding effected without its written consent, which will not be unreasonably withheld, but if settled with such consent or if there is a final judgment for the plaintiff, the indemnifying party agrees to indemnify the indemnified party against any loss, claim or damage by reason of such settlement or judgment. No indemnifying party shall, without the prior written consent of the indemnified party, effect any settlement, compromise or consent to the entry of judgment in any pending or threatened action, suit, claim or proceeding in respect of which indemnification or contribution may be sought (whether or not any indemnified party is or could have been a party), unless such settlement, compromise or consent (i) includes an unconditional release of such indemnified party, in form and substance reasonably satisfactory to such indemnified party, from all liability arising out of such action, suit or proceeding and (ii) does not include any statements as to or any findings of fault, culpability or failure to act by or on behalf of any indemnified party.

(d) If the indemnification provided for in this Section 8 is for any reason held to be unavailable to or otherwise insufficient to hold harmless an indemnified party in respect of any losses, claims, damages or liabilities (or action in respect thereof) referred to therein, then each indemnifying party shall contribute to the aggregate amount paid or payable by such indemnified party, as incurred, as a result of any losses, claims, damages or liabilities (or actions in respect thereof) referred to therein (i) in such proportion as is appropriate to reflect the relative benefits received by the Company and the Guarantors from the offering of the Securities and the Exchange Securities, on the one hand, and by the Holders from receiving Securities or Exchange Securities registered under the Securities Act, on the other hand, or (ii) if the allocation provided by clause (i) is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) but also the relative fault of the Company and the Guarantors on the one hand and the Holders on the other hand in connection with the statements or omissions that resulted in such losses, claims, damages or liabilities, as well as any other relevant equitable considerations. The relative fault of the Company and the Guarantors on the one hand and the Holders on the other shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company and the Guarantors, on the one hand, or by the Holders, on the other hand, and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The amount paid or payable by a party as a result of the losses, claims, damages and liabilities referred to above shall be deemed to include, subject to the limitations set forth in this Section 8, any legal or other fees or liabilities reasonably incurred by such party in connection with investigating or defending any action or claim.

The Company, the Guarantors and each Holder of Transfer Restricted Securities agree that it would not be just and equitable if contribution pursuant to this Section 8(d) were determined by pro rata allocation (even if the Holders were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to in the immediately preceding paragraph. The amount paid or payable by an indemnified party as a result of the losses, claims, damages or liabilities referred to in the immediately preceding paragraph shall be deemed to include, subject to the limitations set forth above, any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 8, none of the Holders shall be required to contribute, in the aggregate, any amount in excess of the amount by which the total price at which the Securities sold by such Holder exceeds the amount of any damages which such Holder has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No Person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any Person who was not guilty of such fraudulent misrepresentation. The Holders’ obligations to contribute pursuant to this Section 8(d) are several in proportion to the respective principal amount of Initial Securities held by each of the Holders hereunder and not joint.

-14-

The indemnity and contribution provisions contained in this Section 8 shall remain operative and in full force and effect regardless of (i) any termination of this Agreement, (ii) any investigation made by or on behalf of the Initial Purchasers or any Holder or any Person controlling any Initial Purchaser or any Holder, or by or on behalf of the Company or the Guarantors or the officers or directors of or any Person controlling the Company or the Guarantors, (iii) acceptance of any of the Exchange Securities and (iv) any sale of Transfer Restricted Securities pursuant to a Shelf Registration Statement.

The remedies provided for in this Section 8 are not exclusive and shall not limit any rights or remedies that may otherwise be available to any indemnified party at law or in equity.

The agreements contained in this Section 8 shall remain in full force and effect, regardless of any termination or cancellation of this Agreement.

SECTION 9. [Reserved].

SECTION 10. Participation in Underwritten Registrations. No Holder may participate in any Underwritten Registration hereunder unless such Holder (a) agrees to sell such Holder’s Transfer Restricted Securities on the basis provided in any underwriting arrangements approved by the Persons entitled hereunder to approve such arrangements and (b) completes and executes all reasonable questionnaires, powers of attorney, indemnities, underwriting agreements, lock-up letters and other documents required under the terms of such underwriting arrangements.

SECTION 11. Selection of Underwriters. The Holders of Transfer Restricted Securities covered by the Shelf Registration Statement who desire to do so may sell such Transfer Restricted Securities in an Underwritten Offering. In any such Underwritten Offering, the investment banker(s) and managing underwriter(s) that will administer such offering will be selected by the Holders of a majority in aggregate principal amount of the Transfer Restricted Securities included in such offering; provided, however, that such investment banker(s) and managing underwriter(s) must be reasonably satisfactory to the Company.

SECTION 12. Miscellaneous.

(a) Remedies. Without limiting the remedies available to the Initial Purchasers and the Holders, the Company and the Guarantors acknowledge that any failure by the Company or the Guarantors to comply with their obligations herein may result in material irreparable injury to the Initial Purchasers or the Holders for which there is no adequate remedy at law, that it will not be possible to measure damages for such injuries precisely and that, in the event of any such failure, the Initial Purchasers or any Holder may obtain such relief as may be required to specifically enforce the Company’s and the Guarantors’ obligations herein; provided, however, that the remedies set forth in Section 5 hereof shall be the sole and exclusive remedy of the Holders for each and any Registration Default pursuant to this Agreement.

(b) No Conflicting Agreements. Each of the Company and the Guarantors will not on or after the date of this Agreement enter into any agreement with respect to its securities that conflicts with the provisions hereof. The rights granted to the Holders hereunder do not in any way conflict with and are not inconsistent with the rights granted to the holders of the Company’s or any of the Guarantors’ securities under any agreement in effect on the date hereof.

(c) Adjustments Affecting the Securities. The Company will not take any action with respect to the Securities that would materially and adversely affect the ability of the Holders to Consummate any Exchange Offer.

-15-

(d) Amendments and Waivers. The provisions of this Agreement, including the provisions of this sentence, may not be amended, modified or supplemented, and waivers or consents to departures from the provisions hereof may not be given unless the Company and the Guarantors have obtained the written consent of Holders of at least a majority in aggregate principal amount of the outstanding Transfer Restricted Securities affected by such amendment, modification, supplement, waiver or consent; provided that no amendment, modification, supplement, waiver or consent to any departure from the provisions of Section 5 hereof or this proviso shall be effective as against any Holder of Transfer Restricted Securities unless consented to in writing by such Holder. Notwithstanding the foregoing, a waiver or consent to departure from the provisions hereof that relates exclusively to the rights of Holders whose securities are being tendered pursuant to the Exchange Offer and that does not affect directly or indirectly the rights of other Holders whose securities are not being tendered pursuant to such Exchange Offer may be given by the Holders of a majority of the outstanding principal amount of Transfer Restricted Securities being tendered. Any amendments, modifications, supplements, waivers or consents pursuant to this Section 12(d) shall be by a writing executed by each of the parties hereto; provided that each Holder may waive compliance with respect to any obligation of the Company and the Guarantors under this Agreement as it may apply or be enforced by such particular Holder.

(e) Notices. All notices and other communications provided for or permitted hereunder shall be made in writing by hand-delivery, first-class mail (registered or certified, return receipt requested), telex, telecopier, or air courier guaranteeing overnight delivery:

(i) if to a Holder, at the address set forth on the records of the Registrar under the Indenture, with a copy to the Registrar under the Indenture; and

(ii) if to the Company or the Guarantors:

Engility Holdings, Inc.

3750 Centerview Drive

Chantilly, Virginia 20151

Telecopier No.: (703)  ###-###-####

Attention: Corporate Secretary

With a copy to:

Bass, Berry & Sims PLC

150 Third Avenue South, Suite 2800

Nashville, Tennessee 37201

Telecopier No.: (615)  ###-###-####

Attention: Ryan D. Thomas

                  Jay H. Knight

All such notices and communications shall be deemed to have been duly given: at the time delivered by hand, if personally delivered; five Business Days after being deposited in the mail, postage prepaid, if mailed; when answered back, if telexed; when receipt acknowledged, if telecopied; and on the next Business Day, if timely delivered to an air courier guaranteeing overnight delivery.

Copies of all such notices, demands or other communications shall be concurrently delivered by the Person giving the same to the Trustee at the address specified in the Indenture.

-16-

(f) Successors and Assigns. This Agreement shall inure to the benefit of and be binding upon the successors and assigns of each of the parties, including, without limitation, and without the need for an express assignment, subsequent Holders of Transfer Restricted Securities; provided, however, that this Agreement shall not inure to the benefit of or be binding upon a successor or assign of a Holder unless and to the extent such successor or assign acquired Transfer Restricted Securities from such Holder in accordance with the Purchase Agreement.

(g) Counterparts. This Agreement may be executed in any number of counterparts and by the parties hereto in separate counterparts, each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement.

(h) Headings. The headings in this Agreement are for convenience of reference only and shall not limit or otherwise affect the meaning hereof.

(i) Governing Law. THIS AGREEMENT AND ANY CLAIM, CONTROVERSY OR DISPUTE ARISING UNDER OR RELATED HERETO SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO THE CONFLICTS OF LAW RULES THEREOF.

(j) Jurisdiction. The Company and the Guarantors hereby submit to the non-exclusive jurisdiction of the Federal and state courts in the Borough of Manhattan in The City of New York in any suit or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby. The Company and the Guarantors irrevocable and unconditionally waive any objection to the laying of venue of any suit or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby in Federal and state courts in the Borough of Manhattan in the City of New York and irrevocably and unconditionally waive and agree not to plead or claim in any such court that any such suit or proceeding in any such court has been brought in an inconvenient forum.

(k) Waiver of Jury Trial. EACH OF THE PARTIES HERETO HEREBY WAIVES ANY RIGHT TO TRIAL BY JURY IN ANY SUIT OR PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT.

(l) Severability. In the event that any one or more of the provisions contained herein, or the application thereof in any circumstance, is held invalid, illegal or unenforceable, the validity, legality and enforceability of any such provision in every other respect and of the remaining provisions contained herein shall not be affected or impaired thereby.

(m) Entire Agreement. This Agreement is intended by the parties as a final expression of their agreement and intended to be a complete and exclusive statement of the agreement and understanding of the parties hereto in respect of the subject matter contained herein. There are no restrictions, promises, warranties or undertakings, other than those set forth or referred to herein with respect to the registration rights granted by the Company with respect to the Transfer Restricted Securities. This Agreement supersedes all prior agreements and understandings between the parties with respect to such subject matter.

-17-

IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written above.

[Signature Page to Registration Rights Agreement]

[Signature Page to Registration Rights Agreement]

The foregoing Registration Rights Agreement is hereby confirmed and accepted as of the date first above written:

[Signature Page to Registration Rights Agreement]