BNP PARIBAS SECURITIES CORP. BNP PARIBAS 787 SeventhAvenue New York, New York 10019

Exhibit 10.1

Execution Copy

CONFIDENTIAL

August 1, 2017

Jacobs Engineering Group Inc.

1999 Bryan Street, Suite 1200

Dallas, Texas 75201

Attention:

Project Charlotte

$1,200,000,000 Senior Unsecured Delayed-Draw Term Loan Facility

Commitment Letter

Ladies & Gentlemen:

You have informed each of BNP Paribas (“BNPP”), BNP Paribas Securities Corp. (“BNPPSC” and, together with BNPP, “BNP Paribas”) and The Bank of Nova Scotia (“Scotiabank”, together with BNP Paribas, the “Commitment Parties”, “we” or “us”) that Jacobs Engineering Group Inc. and its subsidiaries (the “Company” or “you”) intend to acquire, through a merger (the “Acquisition”), the company you have identified to us as “Project Charlotte” and its subsidiaries (collectively, the “Acquired Business”) in a transaction that will result in you owning the Acquired Business.

You have further informed us that:

(a) you intend the financing for the Acquisition will include a $1,200,000,000 senior unsecured delayed-draw term loan facility (the “Term Loan Facility);

(b) (x) you are party to that certain Amended and Restated Credit Agreement, dated as of February 7, 2014 (as amended, modified or supplemented from time to time and in effect as of the date hereof, the “Existing Revolving Credit Agreement”), among the Company, certain subsidiaries of the Company, the several lenders from time to time parties thereto, each issuer of letters of credit from time to time party hereto, and Bank of America, N.A., as administrative agent and swing line lender and (y) you intend to solicit the approvals required under the Existing Revolving Credit Agreement for certain consents and amendments related to the Acquisition (such consents and amendments collectively, the “Amendment”; the approvals required under the Existing Revolving Credit Agreement in connection with such Amendment, the “Required Approvals”); and

(c) solely in the event that the Required Approvals are not obtained for any reason, you intend that financing for the Transaction will also include a new $1,600,000,000 senior unsecured revolving credit facility (the “New Revolving Credit Facility”) as described in that certain letter agreement among us and you, of even date herewith (the “Revolving Credit Facility Commitment Letter”).

Capitalized terms used but not defined herein are used with the meanings assigned to them in the Summary of Terms and Conditions attached hereto as Annex A (the “Term Sheet”), the Schedule of Conditions Precedent to the Term Loan Facility on the Closing Date attached hereto as Annex B

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(“Conditions to Closing Schedule”) and the Schedule of Conditions Precedent to the Term Loan Facility on the Funding Date attached hereto as Annex C (“Conditions to Funding Schedule”, and together with the Conditions to Closing Schedule, the “Conditions Schedules”, and the Term Sheet, the Conditions Schedules and this letter, collectively, the “Commitment Letter”). The Acquisition, the Term Loan Facility, the repayment of certain existing indebtedness of the Acquired Business, the Amendment, or if the Required Approvals are not obtained for any reason, the New Revolving Credit Facility, and the payment of related fees and expenses are hereinafter referred to collectively as the “Transaction”.

Subject to the terms and conditions described in this Commitment Letter and in the confidential fee letter between you and us of even date herewith (the “Fee Letter”), we are pleased to confirm the arrangements under which (a) each of BNPPSC and Scotiabank is exclusively authorized by you to act, and each of BNPPSC and Scotiabank hereby agree to act, as the joint lead arrangers and joint bookrunners (in such capacities, the “Lead Arrangers”) for the Term Loan Facility, (b) BNPP is exclusively authorized by you to act, and BNPP hereby agrees to act, as the administrative agent (in such capacity, the “Administrative Agent”) for the Term Loan Facility, (c) the Lead Arrangers will manage, the syndication of the Term Loan Facility to a syndicate of banks, financial institutions and other persons that will participate in the Term Loan Facility and that are reasonably acceptable to us and to you (your consent not to be unreasonably withheld or delayed) (such banks, financial institutions and other persons, including BNPP and Scotiabank, the “Lenders”), and (d) each of BNPP and Scotiabank (in such capacity, the “Initial Lenders”) commits, on a several but not joint basis, to provide the principal amount of the Term Loan Facility set forth opposite such Commitment Party’s name on Schedule I attached hereto (for the avoidance of doubt, in each case, after giving effect to any original issue discount as contemplated herein or in the Fee Letter).

The commitments of the Initial Lenders hereunder and the undertaking of the Lead Arrangers to provide the services described herein are subject only to the satisfaction of each of the conditions precedent set forth in the Conditions Schedules.

The Lead Arrangers intend to commence syndication of the Term Loan Facility promptly upon your acceptance of this Commitment Letter and the Fee Letter, and until the earlier of (i) a Successful Syndication and (ii) 60 days after the Closing Date (the earlier thereof, the “Syndication Date”), you agree to assist, and use your commercially reasonable efforts to cause the Acquired Business to assist, the Lead Arrangers in attempting to achieve a Successful Syndication. Such assistance shall include your using commercially reasonable efforts to (a) provide the Lead Arrangers with all information reasonably deemed necessary by the Lead Arrangers to achieve a Successful Syndication, including, but not limited to, all customary information with respect to the Acquired Business, the Transaction and the other transactions contemplated hereby, including all customary financial information and customary projections relating to the Acquired Business (including financial estimates, budgets, forecasts and other forward-looking information for the life of the Term Loan Facility, the “Projections”); (b) assist in the preparation of a customary confidential information memorandum (the “Confidential Information Memorandum”) and other customary marketing materials to be used in connection with the syndication of the Term Loan Facility; (c) ensure that the syndication efforts of the Lead Arrangers benefit materially from your existing lending relationships and the existing banking relationships of the Acquired Business; (d) cause direct contact between your senior management, representatives and advisors (and your using commercially reasonable efforts to cause direct contact between senior management, representatives and advisors of the Acquired Business) and the proposed Lenders and the Lead Arrangers; and (e) host, with the Lead Arrangers, one or more meetings (including telephonically) of prospective Lenders at times and locations to be mutually agreed upon (and your using commercially reasonable efforts to cause senior management of the Acquired Business to be available for such meetings).

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You acknowledge that the Lead Arrangers on your behalf will make available an information package and presentation to the proposed syndicate of Lenders by posting the information package and presentation on DebtDomain, SyndTrak, IntraLinks or another similar electronic system. You also acknowledge that certain prospective Lenders may be “public side” Lenders (i.e., Lenders that have personnel that do not wish to receive material non-public information (within the meaning of the United States federal securities laws) with respect to you, the Acquired Business, your or its subsidiaries, the respective securities of any of the foregoing or the Transaction and who may be engaged in investment and other market-related activities with respect to such entities’ securities). At the reasonable request of the Lead Arrangers, you agree to assist in the preparation of a version of the information package and presentation consisting exclusively of information and documentation with respect to the Acquired Business, the Acquired Business’ securities and the Transaction that is either (a) information is publicly available, (b) not material with respect to you, the Acquired Business, your or its respective subsidiaries, the Transaction or any of your or their respective securities for purposes of United States federal and state securities laws or (c) of a type that would be publicly disclosed in connection with any issuance by the Acquired Business or any of their respective subsidiaries of any debt or equity securities issued pursuant to a public offering, Rule 144A offering or other private placement where assisted by a placement agent (all such information and documentation being “Public Lender Information” and with any information and documentation that is not Public Lender Information being referred to herein as “Private Lender Information”). It is understood that in connection with your assistance described above, customary authorization letters will be included in any information package and presentation whereby you or the Acquired Business authorize the distribution of such information to prospective Lenders, containing a representation by you or the Acquired Business to the Lead Arrangers that the Public Lender Information does not include information about the Company, its subsidiaries or its securities other than as described in clauses (a) through (c) above, and the Public Lender Information will contain customary language exculpating us, our affiliates, you, the Acquired Business and your and their affiliates with respect to any liability related to the use of the contents of such Public Lender Information or any related marketing material by the recipients thereof in violation of applicable securities laws. You acknowledge and agree that the following documents may be distributed to potential Lenders wishing to receive only the Public Lender Information (unless you promptly notify us otherwise and provided that you have been given a reasonable opportunity to review such documents): (x) drafts and final definitive documentation with respect to the Term Loan Facility (excluding, if applicable, any specifically identified confidential schedules thereof); (y) administrative materials prepared by the Lead Arrangers for prospective Lenders (such as a Lender meeting invitation, allocations and funding and closing memoranda (but excluding any projections)); and (z) notification of changes in the terms of the Term Loan Facility. You also agree to identify that portion of any other Information (as defined below) as relating to you or the Acquired Business (the “Acquired Business Materials”) to be distributed to “public side” Lenders and that you will clearly and conspicuously mark such materials “PUBLIC” which, at a minimum, shall mean that the word “PUBLIC” shall appear prominently on the first page thereof. By marking the Acquired Materials “PUBLIC,” you shall be deemed to have authorized the Lead Arrangers and the proposed Lenders to treat the Acquired Business Materials as not containing any information with respect to the Acquired Business Materials or its securities other than as described in clauses (a) through (c) above. You agree that, unless expressly identified as Public Lender Information, each document to be disseminated by the Lead Arrangers to any Lender in connection with the Term Loan Facility will be deemed to contain Private Lender Information (except with respect to those documents described in clauses (x), (y) and (z) of the second preceding sentence).

To ensure an orderly and effective syndication of the Term Loan Facility and the commitments provided herein, you agree that, after your acceptance hereof but and until the later of the Closing Date and the Syndication Date, (i) you will not and will not permit any of your affiliates to, and (ii) you will

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use commercially reasonable efforts to cause the Acquired Business and its subsidiaries not to syndicate or issue, attempt to syndicate or issue, announce or authorize the announcement of the syndication or issuance of any offering, placement or arrangement of any debt securities or syndicated bank financing (other than (a) indebtedness incurred in the ordinary course of business for general corporate purposes and consistent with past practices for capital expenditures and working capital purposes, (b) the Term Loan Facility, (c) revolving borrowings and letters of credit issued under the Existing Revolving Credit Agreement or, if applicable, the New Revolving Credit Facility, in each case, incurred in the ordinary course of business for general corporate purposes consistent with past practices and (d) indebtedness permitted to be incurred and/or remain outstanding under the Acquisition Agreement as in effect on the date hereof, if any (“Permitted Surviving Debt”)) by or on behalf of you, the Acquired Business, or any of your or the Acquired Business’ subsidiaries, without the prior written consent of the Lead Arrangers if such debt securities or syndicated bank financing would have, in the reasonable judgment of the Lead Arrangers, a detrimental effect upon the primary syndication of the Term Loan Facility.

It is understood and agreed that the Lead Arrangers will manage and control all aspects of the syndication in consultation with you, including decisions as to the selection of prospective Lenders (which selection shall, for the avoidance of doubt, be subject to your consent (not to be unreasonably withheld or delayed)), when commitments will be accepted, and final allocations of the commitments among the Lenders. You agree that no other agents, co-agents, arrangers, syndication agents or book managers or bookrunners will be appointed, no other titles will be awarded and no compensation (other than that expressly contemplated by the Fee Letter) will be paid in connection with the Term Loan Facility unless otherwise agreed between the Commitment Parties and you. It is also understood and agreed that the amount and distribution of the fees among the Lenders will be at the sole and absolute discretion of the Lead Arrangers. You and we also agree that BNP Paribas will have “left” placement and Scotiabank will appear to its immediate right in any and all marketing materials or other documentation used in connection with the Term Loan Facility.

Notwithstanding any other provision of this Commitment Letter to the contrary and notwithstanding any syndication, assignment or other transfer by the Initial Lenders, (a) the Initial Lenders shall not be relieved, released or novated from its obligations hereunder (including its obligation to fund its applicable percentage of the Term Loan Facility on the Funding Date) in connection with any syndication, assignment or other transfer until after the funding of the Term Loan Facility on the Funding Date, (b) no such syndication, assignment or other transfer shall become effective with respect to any portion of the Initial Lenders’ commitments in respect of the Term Loan Facility until the funding of the Term Loan Facility on the Funding Date, and (c) unless the Company agrees in writing, the Initial Lenders shall retain exclusive control over all rights and obligations with respect to its commitments in respect of the Term Loan Facility, including all rights with respect to consents, waivers, modifications, supplements and amendments, until the Funding Date has occurred.

The Commitment Parties hereby acknowledge and agree that the syndication described in this Section 2 is not a condition to the obligation of the Initial Lenders to fund the Term Loan Facility.

You hereby represent, warrant that (with respect to information provided by or relating to the Acquired Business or its respective operations or assets, to your knowledge) (a) all written factual information and written factual data, other than (i) the Projections (defined below), estimates, budgets and other forward-looking information and (ii) information of a general economic or industry specific nature (such written information and data other than as described in the immediately preceding clauses (i) and (ii), the “Information”), that has been or will be made available to the Lead Arrangers or the other Lenders, directly or indirectly, by you, the sellers of the Acquired Business, the Acquired Business or by

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any of your or their respective representatives on your behalf in connection with the transactions contemplated hereby, when taken as a whole after giving effect to all supplements and updates provided thereto, is or will be, when furnished, supplemented or updated, correct in all material respects and does not or will not, when furnished, supplemented or updated, contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements contained therein not materially misleading in light of the circumstances under which such statements are made (after giving effect to all supplements and updates provided thereto through the later of the Closing Date and the Syndication Date) and (b) the Projections, when taken as a whole, have been, or will be, prepared in good faith based upon assumptions that are believed by you to be reasonable at the time prepared and at the time the related Projections are so furnished; it being understood that (i) the Projections are merely a prediction as to future events and are not to be viewed as facts, (ii) the Projections are subject to significant uncertainties and contingencies, many of which are beyond the control of you and/or the Acquired Business, and (iii) no assurance can be given that any particular Projections will be realized and that actual results during the period or periods covered by any such Projections may differ significantly from the projected results and such differences may be material. You agree that if, at any time prior to the later of the Syndication Date and the Closing Date, you become aware that any of the representations in the preceding sentence would be incorrect in any material respect if the Information or the Projections were being furnished and such representations were being made at such time, you will (or, with respect to Information and Projections concerning the Acquired Business, you will, subject to any applicable limitations on your rights as set forth in the Acquisition Agreement, use commercially reasonable efforts to) supplement the Information and the Projections from time to time until such later date such that (to your knowledge with respect to the Acquired Business and its subsidiaries) the representations and warranties will be correct under those circumstances, it being understood that such supplementation (to the extent made prior to the Closing Date) shall cure any breach of such representation and warranty. You understand that in arranging and syndicating the Term Loan Facility, the Lead Arrangers will be using and relying on the Information and the Projections without independent verification thereof.

The Commitment Parties hereby acknowledge and agree that the requirement to provide the information described in this Section 3 is not a condition to the obligation of the Initial Lenders to fund the Term Loan Facility.

Whether or not a definitive financing agreement is entered into, you shall pay (or cause to be paid) our reasonable out-of-pocket costs and expenses (including the reasonable fees and expenses of one primary law firm and one local counsel for each of BNP Paribas and Scotiabank in each reasonably necessary, relevant and material jurisdiction, professional fees of consultants and other experts, and syndication and due diligence expenses) incurred before or after the date of this Commitment Letter arising in connection with the Commitment Letter, the Fee Letter, the definitive documentation for the Term Loan Facility, the syndication of the Term Loan Facility and the other transactions contemplated hereby, whether or not the Term Loan Facility closes, provided that you shall not be required to pay our legal expenses relating to enforcement of the Company’s rights under this Commitment Letter or the Fee Letter.

You hereby agree to indemnify and hold harmless the Administrative Agent, the Commitment Parties and their respective affiliates and each director, officer, employee, agent, attorney and affiliate thereof (each such person, an “Indemnified Person”) from and against any losses, claims, damages, liabilities or other expenses to which an Indemnified Person may become subject, insofar as such losses, claims, damages, liabilities (or actions or other proceedings commenced or threatened in respect thereof) or other expenses arise out of or in any way relate to or result from the Transaction, the Commitment Letter and the Fee Letter or any other transaction contemplated by the foregoing, and to reimburse, on

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demand, each Indemnified Person for any reasonable legal or other expenses of one primary law firm and one local counsel (and, in the case of an actual conflict of interest, one additional counsel to the affected Indemnified Persons) in each reasonably necessary, relevant and material jurisdiction, or other reasonable and documented out-of-pocket expenses incurred in connection with investigating, defending or participating in any such investigation, litigation or other proceeding (a “Proceeding”) (whether or not any such investigation, litigation or other proceeding involves claims made among you, the Acquired Business, its subsidiaries or any third party (other than any Indemnified Person), on the one hand, and any such Indemnified Person, on the other hand, and whether or not any such Indemnified Person is a party to any Proceeding out of which any such expenses arise); provided, the indemnity contained herein shall not apply to the extent that it is determined in a final nonappealable judgment by a court of competent jurisdiction that such losses, claims, damages, liabilities or other expenses result from (a) the bad faith, gross negligence or willful misconduct of any Indemnified Person or any material breach of any Indemnified Person’s obligations hereunder, (b) the material breach of any Indemnified Person’s obligations under this Commitment Letter, or (c) disputes arising solely among Indemnified Persons, other than (x) disputes involving BNP Paribas or Scotiabank solely in each of their respective capacities as administrative agent, book-runner or lead arranger (as applicable) for the Term Loan Facility but solely with respect to BNP Paribas or Scotiabank in such capacity and not to any other Indemnified Person, person or entity involved therewith and (y) claims not arising out of any act or omission of you, the Acquired Business or any of your or their respective subsidiaries or affiliates. You shall not be liable for any settlement of any Proceeding (or expenses solely in respect of such settlement) effected without your consent (which consent shall not be unreasonably withheld, delayed or conditioned but in any event not be required during an event of default under the Credit Documents), but if settled with your written consent (if required), or if there is a final judgment against an Indemnified Person in any such Proceeding, you agree to indemnify and hold harmless each Indemnified Person to the extent and in the manner set forth above. You shall not, without the prior written consent of the affected Indemnified Person (which consent shall not be unreasonably withheld or delayed), effect any settlement of any pending or threatened Proceeding against such Indemnified Person in respect of which indemnity could have been sought hereunder by such Indemnified Person unless such settlement (x) includes an unconditional release of such Indemnified Person from all liability or claims that are the subject matter of such Proceeding and (y) does not include any statement as to any admission of fault or culpability. The obligations to indemnify each Indemnified Person and to pay such legal and other expenses shall remain effective until the Closing Date, and thereafter the indemnification and expense reimbursement obligations contained herein shall automatically terminate and be superseded by those contained in the definitive documentation for the Term Loan Facility pursuant to which the Company shall be liable for such indemnification and expense reimbursement obligations as provided therein. No party hereto shall be liable for any damages arising from the use by others of the Information or other materials obtained through internet, DebtDomain, SyndTrak, IntraLinks or similar information transmission systems in connection with the Term Loan Facility, except to the extent any such damages are found in a final non-appealable judgment of a court of competent jurisdiction to have resulted from the gross negligence, bad faith or willful misconduct of, or material breach of this Commitment Letter or the Fee Letter by, such person (or its controlled affiliates and controlling persons and their respective directors, officers, employees, partners, advisors, agents and other representatives); provided, nothing contained in this sentence shall limit your indemnification and reimbursement obligations to the extent expressly set forth herein. No Indemnified Person or any indemnifying person shall be responsible or liable to any other party or any other person for any indirect, consequential, punitive or special damages in connection with the Transaction, this Commitment Letter, the Fee Letter or any other transaction contemplated by the foregoing. The foregoing provisions of this paragraph shall be in addition to any rights that any Indemnified Person may have at common law or otherwise.

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You will afford us a marketing period of at least 20 consecutive business days (the “Marketing Period”) following the earlier of (x) launch of the general syndication of the Term Loan Facility (which launch will be deemed to occur on the date of the initial meeting (including, telephonically) of the prospective Lenders) and (y) the delivery by the Borrower to the Lead Arrangers of the Required Information. “Required Information” will mean the materials required to be delivered pursuant to clauses (a) and (b) in paragraph 2 hereof.

The Commitment Parties hereby acknowledge and agree that the Marketing Period described in this Section 5 is not a condition to the obligation of the Initial Lenders to fund the Term Loan Facility.

This Commitment Letter is delivered to you on the understanding that neither this Commitment Letter nor the Fee Letter nor any of their terms or substance shall be disclosed, directly or indirectly, by you to any other person or entity except (a) to your affiliates officers, directors, employees, attorneys, accountants and advisors who are directly involved in the consideration of this matter and on a confidential and need-to-know basis, (b) as required by applicable law or compulsory legal process or in connection with any pending legal proceeding or regulatory review (in each case under this clause (b), you agree, to the extent permitted by applicable law, to inform us promptly thereof) or (c) to the extent that such information becomes publicly available other than by reason of improper disclosure by you; provided that you may disclose this Commitment Letter and the Fee Letter (but as to the Fee Letter, only to the extent the Fee Letter has been redacted to delete all of the economic provisions thereof) (i) to the Acquired Business, its affiliates and their respective officers, directors, employees, attorneys, accountants, agents and advisors, in each case who are directly involved in the consideration of this matter and on a confidential and need-to-know basis, (ii) to any rating agencies, (iii) to actual or prospective counterparties (or their advisors) to any swap or derivative transaction relating to you or any of your affiliates or any of their respective obligations, (iv) after your acceptance of this Commitment Letter and the Fee Letter, in required filings with the Securities and Exchange Commission and other applicable regulatory authorities and stock exchanges, (v) in connection with any action or proceeding relating to this Commitment Letter, the Fee Letter or the transactions contemplated hereby or the enforcement of any rights hereunder or thereunder and (vi) as we may permit in writing.

We agree to hold all non-public information regarding you, the Acquired Business, your and its affiliates and business, identified as such by you and obtained by us in connection with the transactions contemplated hereby, in accordance with our respective customary procedures for handling confidential information of such nature, it being understood and agreed by you that, in any event, we (a) may make disclosures of such non-public information (i) to our affiliates and to our and our affiliates’ respective employees, legal counsel, independent auditors and other experts or agents and advisors or to our current or prospective financing sources and to other persons authorized by any of us to organize, present or disseminate such information in connection with disclosures otherwise made in accordance with this paragraph 6 (it being understood that the persons to whom such disclosure is made will be informed of the confidential nature of such information and instructed to keep such information confidential), (ii) to any actual or potential assignee, transferee, participant or securitization party of any rights, benefits, interests and/or obligations arising out of the Term Loan Facility or to any direct or indirect contractual counterparties (or the professional advisors thereto) in swap or derivative transactions related to the Term Loan Facility (it being understood that the persons to whom such disclosure is made will be informed of the confidential nature of such information and instructed to keep such information confidential), (iii) to (x) any rating agency in connection with rating you, your subsidiaries or the Term Loan Facility or (y) the CUSIP Service Bureau or any similar agency in connection with the issuance and monitoring of CUSIP numbers with respect to the Term Loan Facility, (iv) as required or requested by any regulatory authority purporting to have jurisdiction over any of us or any of our respective affiliates (including any self-

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regulatory authority, such as the National Association of Insurance Commissioners) (in which case the applicable Commitment Party shall, except with respect to any audit or examination conducted by bank accountants or any governmental bank regulatory authority exercising examination or regulatory authority, promptly notify you, in advance, to the extent lawfully permitted to do so), (v) to the extent required by order of any court, governmental agency or representative thereof or in any pending legal or administrative proceeding, or otherwise as required by applicable law or judicial process (in which case, to the extent permitted by law, the applicable Commitment Party agrees to inform you promptly thereof), (vi) in connection with any action or proceeding relating to this Commitment Letter, the Fee Letter or the transactions contemplated hereby or the enforcement of any rights hereunder or thereunder, (vii) for purposes of establishing a “due diligence” defense, (viii) with the consent of you, or (ix) to the extent such information (x) becomes publicly available other than as a result of a breach of this paragraph 6, (y) becomes available to us or any of our respective affiliates on a non-confidential basis from a source other than you, the Acquired Business, or your or their respective affiliates, or (z) is independently developed by us or any of our respective affiliates; (b) after the closing of the Transaction, may disclose the existence of the Credit Documents and the information about such Credit Documents to market data collectors and similar services providers to the lending industry (including without limitation for league table designation purposes) and to service providers to us or any of our respective affiliates in connection with the administration and management of such Credit Documents; and (c) after the closing of the Transaction, we may (at our own expense) place advertisements in financial and other newspapers and periodicals or on a home page or similar place for dissemination of information on the Internet or worldwide web as we may choose, and circulate similar promotional materials, in the form of a “tombstone” or otherwise describing the names of you and your affiliates (or any of them), and the amount, type and closing date with respect to the transactions contemplated hereby. Our respective obligations under this paragraph shall automatically terminate and be superseded by the confidentiality provisions contained in the definitive documentation for the Term Loan Facility upon the funding of the Term Loan Facility.

You agree, on behalf of yourself and your affiliates, that all information (including but not limited to the Projections) provided by or on behalf of you and your affiliates to us in connection with the Term Loan Facility may be disseminated by or on behalf of us and made available to prospective Lenders who have agreed to be bound by customary confidentiality undertakings (including, “click-through” agreements), all in accordance with our and our respective affiliates’ standard loan syndication practices (whether transmitted electronically by means of a website, e-mail or otherwise, or made available orally or in writing, including at prospective Lender or other meetings). You hereby further authorize us to download copies of your and the Acquired Business’ logos from their respective websites and post copies thereof on a DebtDomain, SyndTrak, IntraLinks or similar workspace and use such logos on any confidential information memoranda, presentations and other marketing materials.

You acknowledge that any Commitment Party or its affiliates may be providing financing or other services to parties whose interests may conflict with yours. You further acknowledge and agree that (a) no fiduciary, advisory or agency relationship between you and us or any of our respective affiliates is intended to be or has been created in respect of any of the transactions contemplated by this Commitment Letter, irrespective of whether we or any of our respective affiliates has advised or is advising you on other matters, (b) the Commitment Parties, on the one hand, and you, on the other hand, have an arms-length business relationship that does not directly or indirectly give rise to, nor do you rely on, any fiduciary duty on the part of any Commitment Party, (c) you are capable of evaluating and understanding, and you understand and accept, the terms, risks and conditions of the transactions contemplated by the Commitment Letter, (d) you have been advised that each Commitment Party is engaged in a broad range of transactions that may involve interests that differ from your interests and that none of the Commitment

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Parties has any obligation to disclose such interests and transactions to you by virtue of any fiduciary, advisory or agency relationship, and (e) you waive, to the fullest extent permitted by law, any claims you may have against any Commitment Party for breach of fiduciary duty or alleged breach of fiduciary duty and agree that none of the Commitment Parties shall have any liability (whether direct or indirect) to you in respect of such a fiduciary duty claim or to any person asserting a fiduciary duty claim on behalf of or in right of you, including your stockholders, employees or creditors. Additionally, you acknowledge and agree that none of the Commitment Parties is advising you as to any legal, tax, investment, accounting or regulatory matters in any jurisdiction. You shall consult with your own advisors concerning such matters and shall be responsible for making your own independent investigation and appraisal of the transactions contemplated hereby, and none of the Commitment Parties shall have any responsibility or liability to you with respect thereto. Any review by any Commitment Party of the Company, the Acquired Business, the Transaction, the other transactions contemplated hereby or other matters relating to such transactions will be performed solely for the benefit of such Commitment Party and shall not be on behalf of you or any of your affiliates.

We hereby notify you that pursuant to the requirements of the USA PATRIOT Improvement and Reauthorization Act, Title III of Pub. L. 109-177 (signed into law March 9, 2009) (as amended from time to time, the “PATRIOT Act”), each of us and each of the Lenders may be required to obtain, verify and record information that identifies the Company and any other borrowers under the Term Loan Facility, which information includes the name, address, tax identification number and other information regarding the Company and such other borrowers that will allow us and the Lenders to identify the Company and such other borrowers in accordance with the PATRIOT Act. This notice is given in accordance with the requirements of the PATRIOT Act and is effective as to us and each Lender.

This Commitment Letter and the Fee Letter shall be governed by, and construed in accordance with, the laws of the State of New York. Each of the parties hereto expressly agrees that the state or federal courts located in New York County, State of New York shall have exclusive jurisdiction to hear and determine any claims pertaining to this Commitment Letter and the Fee Letter or any transaction relating hereto, any other financing related thereto, and any investigation, litigation or proceeding related to or arising out of any such matter and hereby submits and consents in advance to such jurisdiction in any action or suit commenced in any such court, and hereby waives any objection which any of them may have based on lack of personal jurisdiction, improper venue or inconvenient forum, provided, that, notwithstanding the preceding sentence and the governing law provisions of this Commitment Letter and the Fee Letter, it is understood and agreed that (a) the interpretation of the definition of “Company Material Adverse Effect” and whether there shall have occurred a “Company Material Adverse Effect,” (b) whether the Acquisition has been consummated in accordance with the terms of the Acquisition Agreement (as defined in Annex C) and (c) whether the Specified Acquisition Agreement Representations (as defined in Annex C) are true and correct in all material respects as of the Funding Date (or, with respect to such representations that are qualified by materiality, material adverse effect or language of similar effect are true and correct in all respects as of the Funding Date) and whether the Company has the right to terminate its obligations, or decline to consummate the Acquisition, under the Acquisition Agreement as a result of such representations and warranties failing to be true and correct, shall be determined in accordance with the laws of the State of Delaware without regard to conflict of laws principles that may be applicable under conflicts of laws principles (whether of the State of Delaware or any other jurisdiction). Each of the parties hereto irrevocably waives any and all right to trial by jury in any action, proceeding or counterclaim (whether based on contract, tort or otherwise) arising out of or relating to this Commitment Letter, the Fee Letter, the Transaction and the other transactions contemplated hereby and thereby or the actions of any Commitment Party in the negotiation, performance or enforcement hereof or thereof.

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Paragraphs 5-10 hereof shall (except as otherwise therein provided) remain in full force and effect regardless of whether the Credit Documents are executed and delivered and notwithstanding the termination of this Commitment Letter or any commitment or undertaking of the Commitment Parties hereunder. In addition, in the event the Credit Documents are executed and delivered, the provisions in paragraph 2 hereof shall survive until the Syndication Date.

This Commitment Letter is not assignable by you (other than to affiliates reasonably acceptable to the Commitment Parties in connection with the structuring of the Transaction) without our prior written consent and is intended to be solely for the benefit of the parties hereto and each Indemnified Person. Any and all obligations of, and services to be provided by, the Commitment Parties hereunder may be performed and any and all rights of the Commitment Parties hereunder may be exercised by or through any of its affiliates or branches. This Commitment Letter and the Fee Letter may not be amended or waived except by an instrument in writing signed by the Commitment Parties and you. This Commitment Letter and the Fee Letter may be executed in counterparts which, when taken together, shall constitute one original. Delivery of an executed counterpart of this Commitment Letter or the Fee Letter by telecopier, facsimile or electronic format (i.e., “pdf” or “tif”) shall be effective as delivery of a manually executed counterpart thereof.

This Commitment Letter, together with the Fee Letter, embodies the entire agreement and understanding among us, you and your affiliates with respect to the Term Loan Facility and supersedes all prior agreements and understandings, whether written or oral, relating to the specific matters hereof. Matters that are not covered or made clear in this Commitment Letter or in the Fee Letter are subject to mutual agreement of the parties hereto. No party has been authorized by any Commitment Party to make any oral or written statements that are inconsistent with this Commitment Letter.

This Commitment Letter and all commitments and undertakings of the Commitment Parties hereunder will expire automatically and without further action or notice and without further obligation to you at 5:00 p.m. (New York City time) on August 1, 2017 unless you execute this Commitment Letter and the Fee Letter and return them prior to that time to (i) BNP Paribas at 787 Seventh Avenue, New York, New York 10019, Attention: Brendan Heneghan and (ii) Scotiabank at 250 Vesey Street, New York, New York 10281, Attention: Michael Grad. Thereafter, all commitments and undertakings of the Commitment Parties hereunder will expire on the earliest to occur of (a) August 1, 2018, unless the Closing Date occurs on or prior thereto, (b) any time after the execution of the Acquisition Agreement and prior to the consummation of the Transaction, the date of the termination of the Acquisition Agreement (other than with respect to ongoing indemnities, confidentiality provisions and similar provisions), and (c) the closing of the Acquisition without the use of the Term Loan Facility.

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We are pleased to have the opportunity to work with you in connection with this important financing.

[Signature page to Commitment Letter]

[Signature page to Commitment Letter]

Agreed and Accepted

this 1st day of August, 2017

[Signature page to Commitment Letter]

SCHEDULE I

Commitments

Execution Copy

Annex A

JACOBS ENGINEERING GROUP INC.

$1,200,000,000 Senior Unsecured Delayed-Draw Term Loan Facility

Summary of Terms and Conditions

This Summary of Terms and Conditions describes the principal terms of the Term Loan Facility referred to in the Commitment Letter of which this Annex A is a part. All capitalized terms used but not defined herein have the meanings given to them in the Commitment Letter.

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Annex B

Schedule of Conditions Precedent to the Term Loan Facility on the Closing Date

This Schedule of Conditions Precedent to the Term Loan Facility sets forth the conditions to closing the Term Loan Facility on the Closing Date and is the Conditions to Closing Schedule referred to in the Commitment Letter of which this Annex B is a part. Certain capitalized terms used herein are defined in the Commitment Letter, the Summary of Terms and Conditions attached thereto as Annex A and the Conditions to Funding Schedule attached thereto as Annex C.

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Annex C

Schedule of Conditions Precedent to the Term Loan Facility on the Funding Date

This Schedule of Conditions Precedent to the Term Loan Facility sets forth the conditions to funding the Term Loan Facility on the Funding Date and is the Conditions to Funding Schedule referred to in the Commitment Letter of which this Annex C is a part. Certain capitalized terms used herein are defined in the Commitment Letter, the Summary of Terms and Conditions attached thereto as Annex A and the Conditions to Closing Schedule attached thereto as Annex B.

(a) Either (x) the Required Approvals shall have been obtained and the lenders constituting the applicable “Required Lenders” under the Existing Revolving Credit Agreement and each other party to the Revolving Credit Facility Amendment shall have executed and delivered the Revolving Credit Facility Amendment on terms (and subject to conditions) consistent with the Revolving Credit Facility Commitment Letter and as otherwise required by the consenting lenders thereunder and otherwise reasonably satisfactory to the Commitment Parties or (y) the Borrower and each other party to the New Revolving Credit Facility shall have executed and delivered the New Revolving Credit Facility Documentation on terms consistent with the Revolving Credit Facility Commitment Letter and otherwise reasonably satisfactory to the Commitment Parties.

(b) The Acquisition will have been consummated in accordance with the terms of the Agreement and Plan of Merger dated as of the date of the Commitment Letter among the Borrower, the Charlotte entity specified therein and the other parties thereto (as amended, supplemented, or otherwise modified in accordance with this paragraph 2(b), the “Acquisition Agreement”), which will be in form and substance reasonably satisfactory to the Lead Arrangers (and the Lead Arrangers hereby acknowledge that the Acquisition Agreement delivered to them as of August 1, 2017 is satisfactory), and all conditions precedent for the Borrower to the consummation of the Acquisition, as set forth in the Acquisition Agreement, will have been satisfied in all material respects without any waiver, amendment, supplement or other modification that is materially adverse to the Lenders unless the Lead Arrangers will have consented thereto; provided that (x) any change in the definition of “Company Material Adverse Effect” (as defined in the Acquisition Agreement) and (y) any materially adverse modifications to any of the following provisions contained in Sections 7.3, 8.9, 8.12 and 8.15 of the Acquisition Agreement that relate to the Administrative Agent’s or any Lender’s liability, jurisdiction, or status as a third party beneficiary under the Acquisition Agreement, in each case, shall be deemed to be materially adverse to the interest of the Lenders.

(a) Each of the Specified Representations shall be true and correct in all material respects as of the Funding Date (provided any such representations that are qualified by materiality, material adverse effect or language of similar effect shall be true and correct in all respects as of the Funding Date).

(b) Each of the representations and warranties made by the Acquired Business in the Acquisition Agreement as are material to the interests of the Lenders (the “Specified Acquisition Agreement Representations”) shall be true and correct in all material

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respects as of the Funding Date (provided any such representations that are qualified by materiality, material adverse effect or language of similar effect shall be true and correct in all respects as of the Funding Date), but only to the extent that Borrower has the right to terminate its obligations, or decline to consummate the Acquisition, under the Acquisition Agreement as a result of such representations and warranties failing to be true and correct.

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Annex D

Consolidated Net Income and Consolidated EBITDA Definitions

“Consolidated Net Income” means, for any period, the consolidated net income of the Company and its Subsidiaries as determined in accordance with GAAP.

“Consolidated EBITDA” means, for any period, an amount determined for the Company and its Subsidiaries on a consolidated basis equal to:

(a) Consolidated Net Income for such period, plus,

(b) the following to the extent deducted in calculating such Consolidated Net Income, the sum, without duplication, of amounts for:

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(c) without duplication and to the extent included in arriving at such Consolidated Net Income, any extraordinary, unusual, infrequent or non-recurring gains for such period,

provided, however, that if there has occurred a Permitted Acquisition, Investment or Disposition during the relevant period, Consolidated EBITDA shall be calculated, at the option of the Company, on a pro forma basis after giving effect to such Permitted Acquisition, Investment or Disposition as if such Permitted Acquisition, Investment or Disposition occurred on the first day of such period, and

provided, further, that Consolidated EBITDA may, at the option of the Company, be further adjusted for any pro forma adjustments that are made in accordance with the SEC pro forma reporting rules under the Securities Exchange Act of 1934.

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