Jacobs Engineering Group Inc. 1999 Stock Incentive Plan, as amended and restated

Purpose.

Definitions.

Eligibility; Award Agreements.

Administration.

The Plan shall be administered by the Committee. The Board of Directors shall fill vacancies on, and from time to time may remove or add members to, the Committee. The Committee shall act pursuant to a majority vote or unanimous written consent.

The Committee shall determine: the Participants to whom, and the time or times at which, Awards will be granted; the type of Awards to be granted; the number of Shares (or amount of cash) to be subject to each Award and the form of settlement thereof; the duration of each Award; the time or times within which Options may be exercised; and any other terms and conditions of the Awards, at grant or while outstanding, pursuant to the terms of the Plan. The Committee

shall also establish such rules and regulations and appoint such agents as it shall deem appropriate for the proper administration of the Plan, and make any other determination and take any other action that the Committee deems necessary or desirable for the administration of the Plan, including addressing unanticipated events (including any temporary closure of the stock exchange on which the Company is listed, disruption of communications or natural catastrophe).

Except as provided in Paragraph 14, each determination or other action made or taken pursuant to the Plan, including interpretations of the Plan and the specific conditions and provisions of the Awards, shall be final and conclusive for all purposes and upon all persons including, but without limitation, the Company, its Related Companies, the Committee, the Board of Directors, Participants, and the respective successors in interest of any of the foregoing.

Notwithstanding the foregoing, with respect to any Award that is not intended to satisfy the conditions of Rule 16b-3 under the 1934 Act or Section 162(m), and to the extent not inconsistent with applicable law or the rules and regulations of the principal U.S. national securities exchange on which the Shares are traded, the Committee may appoint one or more separate committees (any such committee, a “Subcommittee”) composed of one or more directors of the Company, who unlike the members of the Committee, may be employee directors of the Company. The Committee may delegate to any such Subcommittee(s), with respect to Employees who are not directors or executive officers of the Company, the authority to grant Awards, to determine all terms of such Awards and/or to administer the Plan, pursuant to the terms of the Plan; provided that (i) any resolution of the Committee authorizing such Subcommittee must specify the total number of Shares subject to Awards that such Subcommittee may so award and (ii) the Committee may not authorize any officer to designate himself or herself as the recipient of an Award. Subject to the limitations of the Plan and the limitations of the Committee’s delegation, any such Subcommittee would have the full authority of the Committee pursuant to the terms of the Plan. Any such Subcommittee shall not, however, grant Awards on terms more favorable than Awards provided for by the Committee. Actions by any such Subcommittee within the scope of delegation shall be deemed for all purposes to have been taken by the Committee. Any such Subcommittee shall be required to report to the Committee on any actions that the Subcommittee has taken.

The Committee may designate the Secretary of the Company or any other Company employee to assist the Committee in the administration of the Plan, and may grant authority to such persons to execute Award Agreements or other documents entered into under the Plan on behalf of the Committee or the Company.

The Company shall indemnify and hold harmless the members of the Board of Directors, and other persons who are acting upon the authorization and direction of the Board of Directors, from and against any and all liabilities, costs and expenses incurred by such persons as a result of any act or omission in connection

with the performance of such persons’ duties, responsibilities and obligations under the Plan, other than such liabilities, costs and expenses as may result from the bad faith, willful misconduct or criminal acts of such persons.

Shares and Share Counting.

The Common Stock to be issued, transferred and/or sold under the Plan shall be made available from authorized and unissued Common Stock or from the Company’s treasury shares.

Subject to adjustment as provided in this Paragraph and Paragraph 13, the total number of Shares that may be issued or transferred under the Plan pursuant to Awards may not exceed 29,850,000 Shares. For this purpose, every Share transferred pursuant to an Award granted after September 28, 2012 (i) that is an Option or SAR shall count as one Share and (ii) every Share transferred pursuant to an Award granted after September 28, 2012 other than an Option or SAR shall count as 1.92 Shares. If any Awards granted before September 29, 2012 (“Prior Awards”) are forfeited, in whole or in part, new Awards (“Subsequent Awards”) may be issued with respect to the Shares covered by such Prior Awards. For the purpose of determining the amount of Shares that may be issued pursuant to Subsequent Awards, (1) forfeited Options and SARs shall be counted as one Share per each Share covered and Awards other than Options and SARs shall be counted as 1.92 Shares per each share covered, and (2) Shares issued pursuant to a Subsequent Award shall count as either one Share (if the Award is an Option or SAR) or 1.92 Shares (in the case of an Award other than an Option or SAR). In the event that withholding tax liabilities arising from an Award other than an Option or SAR are satisfied by the withholding of Shares by the Company, then the Shares so withheld shall again be available for Awards under the Plan and shall count as 1.92 Shares for each Share so withheld. Notwithstanding anything to the contrary contained herein, the following Shares shall not be added to the Shares authorized for issuance or transfer under this Paragraph 5(b): (i) Shares tendered by the Participant in payment of the purchase price of an Option, (ii) Shares tendered by the Participant or withheld by the Company to satisfy any tax withholding obligation with respect to Options or SARs, (iii) Shares subject to a SAR (that is, each SAR that is exercised shall reduce the number of Shares available by one Share), and (iv) Shares reacquired by the Company on the open market or otherwise using cash proceeds from the exercise of Options.

In the event that a company acquired by the Company or any Majority-Owned Related Company or with which the Company or any Majority-Owned Related Company combines has shares available under a pre-existing plan approved by shareholders and not adopted in contemplation of such acquisition or combination, the shares available for grant pursuant to the terms of such pre-existing plan (as adjusted, to the extent appropriate, using the exchange ratio or other formula used in such transaction to determine the consideration payable to the holders of common) may be used for Awards under the Plan and shall not reduce the Shares authorized for issuance or transfer under the Plan; provided that

Awards using such available shares shall not be made after the date awards or grants could have been made under the terms of the pre-existing plan, absent the acquisition or combination, and shall only be made to individuals who were not Employees or directors prior to such acquisition or combination.

Options.

Grant. Options may be granted hereunder to Participants either alone or in addition to other Awards. Any Option shall be subject to the terms and conditions of the Plan and such additional terms and conditions, not inconsistent with the provisions of the Plan, as the Committee shall deem desirable.

Option Price. The option price per each Share shall not be less than 100% of the Fair Market Value of one Share on the date of grant of such Option; provided, however, that in the case of an ISO granted to a Participant who, at the time of the grant, owns stock representing more than 10% of the voting power of all classes of stock of the Company or any subsidiary of the Company, the option price per Share shall be no less than 110% of the Fair Market Value of one Share on the date of grant.

Duration of Options. The duration of Options shall be determined by the Committee, but in no event shall the duration exceed ten years from the date of its grant; provided, however, that the term of the Option shall not exceed five years from the date the Option is granted in the case of an ISO granted to a Participant who, at the time of the grant, owns stock representing more than 10% of the voting power of all classes of stock of the Company or any subsidiary of the Company. Notwithstanding the foregoing, in the event that on the last business day of the term of an Option (i) the exercise of the Option, other than an ISO, is prohibited by applicable law or (ii) Shares may not be purchased or sold by certain Participants due to the “black-out period” pursuant to Company policy or a “lock-up” agreement undertaken in connection with an issuance of securities by the Company, the term shall be extended for a period of 30 days following the end of the legal prohibition, black-out period or lock-up agreement.

ISOs. With respect to each grant of an Option to an employee of the Company or any Company subsidiary, the Committee shall determine whether such Option shall be an ISO, and, upon determining that an Option shall be an ISO, shall designate it as such in the written instrument evidencing such Option. Each written instrument evidencing an ISO shall contain all terms and conditions required by Section 422 of the Code. If the written instrument evidencing an Option does not contain a designation that it is an ISO, it shall not be an ISO. The Employee to whom an ISO is granted must be eligible to receive an ISO pursuant to Section 422 of the Code. Solely for purposes of determining whether Shares are available for the grant of ISOs under the Plan, the maximum aggregate number of Shares that may be issued pursuant to ISOs granted under the Plan shall be 29,850,000 Shares, subject to adjustment as provided in Paragraph 13. The aggregate Fair Market Value (determined in each instance on the date on

which an ISO is granted) of the Common Stock with respect to which ISOs are first exercisable by any employee in any calendar year shall not exceed $100,000 for such employee. If any Majority-Owned Related Company of the Company shall adopt a stock option plan under which options constituting ISOs may be granted, the fair market value of the stock on which any such ISOs are granted and the times at which such ISOs will first become exercisable shall be taken into account in determining the maximum amount of ISOs that may be granted to the employee under this Plan in any calendar year.

Exercise of Options. The Award Agreement shall specify when Options vest and become exercisable. An Option may not be exercised in a manner that will result in fractional Shares being issued.

Vested Options granted under the Plan shall be exercised by the Participant (or by a legal representative, to the extent provided in an Award Agreement) as to all or part of the Shares covered thereby, by giving notice of exercise to the Company or its designated agent, specifying the number of Shares to be purchased. The notice of exercise shall be in such form, made in such manner, and shall comply with such other requirements consistent with the provisions of the Plan as the Committee may prescribe from time to time.

Unless otherwise provided in an Award Agreement, full payment of such purchase price shall be made at the time of exercise and shall be made: in cash or cash equivalents (including certified check or bank check or wire transfer of immediately available funds); by tendering previously acquired Shares (either actually or by attestation) valued at their then Fair Market Value; through any other method specified in an Award Agreement (including same-day sales through a broker); or any combination of any of the foregoing. The notice of exercise, accompanied by such payment, shall be delivered to the Company at its principal business office or such other office as the Committee may from time to time direct, and shall be in such form, containing such further provisions consistent with the provisions of the Plan, as the Committee may from time to time prescribe.

Stock Appreciation Rights.

Grant. The Committee may grant SARs in tandem with all or part of any Award (including Options) or at any subsequent time during the term of such Award, or without regard to any other Award, in each case upon such terms and conditions as the Committee may establish.

Grant Price and Duration. A SAR shall have a grant price per Share of not less than the Fair Market Value of one Share on the date of grant or, if applicable, on the date of grant of an Option with respect to a SAR granted in tandem with the Option (subject to the requirements of Section 409A), and subject to adjustments provided in Paragraph 13. A SAR shall have a term not greater than ten years.

Notwithstanding the foregoing, in the event that on the last business day of the term of a SAR (i) the exercise of the SAR is prohibited by applicable law or (ii) Shares may not be purchased or sold by certain employees or directors of the Company due to the “black-out period” of a Company policy or a “lock-up” agreement undertaken in connection with an issuance of securities by the Company, the term shall be extended for a period of 30 days following the end of the legal prohibition, black-out period or lock-up agreement.

Exercise. An Award Agreement covering a SAR shall provide when the SAR vests and becomes exercisable. Upon the exercise of a SAR, the holder shall have the right to receive the excess of (i) the Fair Market Value of one Share on the date of exercise (or such amount less than such Fair Market Value as the Committee shall so determine at any time during a specified period before the date of exercise) over (ii) the grant price of the SAR. Unless otherwise provided in the Award Agreement, the Committee shall determine in its sole discretion whether payment shall be made in cash or Shares, or any combination thereof.

Awards of Restricted Stock and Restricted Stock Units.

Grants. Awards of Restricted Stock and/or Restricted Stock Units may be granted to Participants either alone or in addition to other Awards (a “Restricted Stock Award” or “Restricted Stock Unit Award,” respectively). Restricted Stock Units are Awards denominated in units of Common Stock under which settlement is subject to such vesting conditions and other terms and conditions as the Committee deems appropriate. Each Restricted Stock Unit shall be equal to one share of Common Stock and shall, subject to satisfaction of any vesting and/or other terms and conditions, entitle a recipient to the issuance of one share of Common Stock (or such equivalent value in cash) in settlement of the Award.  The Board of Directors may establish procedures pursuant to which the payment of any Restricted Stock and/or Restricted Stock Unit Award may be deferred, including under the Jacobs Engineering Group Inc. Executive Deferral Plan Further, the rest of this paragraph shall apply to Restricted Stock Units that vest solely based on the passage of time (“Time-Based RSUs”), unless the relevant Award Agreement provides otherwise.  Each Time-Based RSU shall entitle the Participant to a “Dividend Equivalent Right,” to the extent the Company pays a cash dividend with respect to its outstanding Common Stock while the Time-Based RSU remains outstanding.  The term “Dividend Equivalent Right” shall mean a dollar amount equal to the per-share cash dividend paid by the Company.  Any Dividend Equivalent Right will be subject to the same vesting, payment, and other terms and conditions as the Time-Based RSU to which it relates. Any Dividend Equivalent Right that vests will be paid in cash at the same time the share of Common Stock underlying the Time-Based RSU to which it relates is delivered to the Participant.  A Participant will not be credited with Dividend Equivalent Rights with respect to any Time-Based RSU that, as of the record date for the relevant dividend, is no longer outstanding for any reason (e.g., because it has been settled in Common Stock or it has been terminated), and a Participant

will not be entitled to any payment for Dividend Equivalent Rights with respect to any Time-Based RSU that terminates without vesting

Conditions and Restrictions. Restricted Stock Awards and Restricted Stock Unit Awards may be subject to time-based and/or performance-based vesting conditions. In the case of performance-based Awards, the performance goals to be achieved for each performance period shall be conclusively determined by the Committee and may be based upon the criteria set forth in Paragraph 10(b) or such other criteria as determined by the Committee in its discretion. In order to enforce the restrictions imposed upon Restricted Stock Awards, the Committee may require the recipient to enter into an escrow agreement providing that the certificates representing such Restricted Stock Awards shall remain in the physical custody of an escrow holder until any or all of the conditions and restrictions imposed pursuant to the Plan expire or shall have been removed.

Rights of Holders of Restricted Stock and Restricted Stock Units. Unless otherwise provided in the Award Agreement, beginning on the date of grant of the Restricted Stock Award and subject to execution of the Award Agreement, the Participant shall become a shareholder of the Company with respect to all Shares subject to the Award Agreement and shall have all of the rights of a shareholder, including the right to vote such Shares and the right to receive distributions made with respect to such Shares, except as otherwise provided in this Paragraph. Notwithstanding the foregoing, dividends or other distributions that relate to a Restricted Stock or Restricted Stock Unit Award subject to performance based vesting criteria will be subject to the same performance criteria as the underlying Award.A Participant who holds a Restricted Stock Unit Award shall only have those rights specifically provided for in the Award Agreement; provided, however, in no event shall the Participant have voting rights with respect to such Award.

Minimum Vesting Period. Restricted Stock Awards and Restricted Stock Unit Awards shall have a vesting period of not less than (i) three years from date of grant (but permitting pro rata vesting over such time) if subject only to continued service with the Company or a Majority-Owned Related Company and (ii) one year from date of grant if subject to the achievement of performance objectives, subject in either case to accelerated vesting in the Committee’s discretion in the event of the death, Disability or Retirement of the Participant or a Change in Control. Notwithstanding the foregoing, the restrictions in the preceding sentence shall not be applicable to grants of up to 5% of the number of Shares available for Awards on the effective date of the Plan. The Committee may, in its sole discretion waive the vesting restrictions and any other conditions set forth in any Award Agreement under such terms and conditions as the Committee shall deem appropriate, subject to the minimum vesting period requirements in the prior sentence and the limitations imposed under Section 162(m) (in the case of a Restricted Stock Award or Restricted Stock Unit Award intended to comply therewith), except as otherwise determined by the Committee to be appropriate under the circumstances.

Issuance of Shares. Any Restricted Stock granted under the Plan may be evidenced in such manner as the Board may deem appropriate, including book-entry registration or issuance of a stock certificate(s), which certificate(s) shall be held by the Company. Such book entry registration, or certificate shall be registered in the name of the Participant and shall bear an appropriate legend referring to the restrictions applicable to such Restricted Stock.

Incentive Bonus Awards.

Grants. Awards of Incentive Bonuses may be granted hereunder to Participants either alone or in addition to other Awards. Incentive Bonuses payable hereunder may be pursuant to one or more subplans or programs.

Payment. Each Incentive Bonus will confer upon the Participant the opportunity to earn a future cash payment the amount of which shall be based on the achievement of one or more objectively-determined performance goals or criteria established for a performance period determined by the Committee.

Performance Goals. The Committee shall establish the performance goals or criteria on which each Incentive Bonus shall be based. The Committee shall also affirmatively determine at the end of each performance period the level of achievement of any such performance goals or criteria that shall determine the target and maximum amount payable under an Incentive Bonus, which criteria may be based on financial performance and/or personal performance evaluations. The Committee may specify to what extent an Incentive Bonus is intended to satisfy the requirements for “performance-based compensation” under Section 162(m). Notwithstanding anything to the contrary herein, the performance criteria for any portion of an Incentive Bonus that is intended by the Committee to satisfy the requirements for “performance-based compensation” under Section 162(m) shall be a measure based on one or more Qualifying Performance Criteria (as defined in Paragraph 10(b)) selected by the Committee and specified upon or prior to the grant of the Incentive Bonus.

Qualifying Performance-Based Compensation.

General. The Committee may specify that an Award or a portion of an Award is intended to satisfy the requirements for “performance-based compensation” under Section 162(m), provided that, other than with respect to Options or SARs, the performance criteria for an Award or portion of an Award that is intended by the Committee to satisfy the requirements for “performance-based compensation” under Section 162(m) shall be a measure based on one or more Qualifying Performance Criteria selected by the Committee and specified at the time the Award is granted. In the case of any Award that is intended to satisfy the requirements for “performance-based compensation” under Section 162(m), the Committee shall establish the performance criteria with respect to such Award not later than ninety (90) days after the commencement of the period of service to which the performance criteria relate (or, in the case of performance periods of

less than one year, not later than the date upon which 25% of the performance period elapses), provided that the outcome of the performance criteria is substantially uncertain at such time. The Committee shall certify the extent to which any Qualifying Performance Criteria has been satisfied, and the amount payable as a result thereof, prior to payment, settlement or vesting.

Performance Criteria. For purposes of this Plan, the term “Qualifying Performance Criteria” shall mean any one or more of the following performance criteria, or derivations of such performance criteria, either individually, alternatively or in any combination, applied to either the Company as a whole, or to a business unit or group of business units, or Related Company, measured either annually, at a point in time during a performance period, or as an average of values determined at various points of time during a performance period, or cumulatively over a period of years, on an absolute basis or relative to a pre-established target, to previous years’ (or period’s) results or to a designated comparison group, or as a change in values during or between performance periods, in each case as specified by the Committee: (i) revenues; (ii) earnings from operations, earnings before or after income taxes, earnings before or after interest, depreciation, amortization, or earnings before extraordinary or special items, earnings before income taxes and any provision for Incentive Bonuses; (iii) net earnings or net earnings per common share (basic or diluted); (iv) return on assets (gross or net), return on investment, return on capital, or return on beginning, ending or average equity; (v) cash flow, cash flow from operations, free cash flow, cash flow return on investment (discounted or otherwise), net cash provided by operations, or cash flow in excess of cost of capital; (vi) interest expense after taxes; (vii) economic value added or created; (viii) operating margin or profit margin; (ix) stock price or total shareholder return; (x) average cash balance, net cash or cash position; and (xi) strategic business criteria, consisting of one or more objectives based on meeting specified development, strategic partnering, licensing, research and development, market penetration, geographic business expansion goals, cost targets, customer satisfaction, employee satisfaction, management of employment practices and employee benefits, supervision of litigation and information technology, and goals relating to acquisitions or divestitures of subsidiaries, affiliates or joint ventures. To the extent consistent with Section 162(m), the Committee (A) may appropriately adjust any measurement of performance under a Qualifying Performance Criteria to eliminate the effects of charges for restructurings, discontinued operations, unusual or nonrecurring or extraordinary items and all items of gain, loss or expense determined to be extraordinary or unusual in nature or related to the disposal of a segment of a business or related to a change in accounting principle all as determined in accordance with accounting principles generally accepted in the United States, as well as the cumulative effect of accounting changes, in each case as determined in accordance with accounting principles generally accepted in the United States or identified in the Company’s financial statements or notes to the financial statements, and (B) may appropriately adjust any measurement of performance under a Qualifying Performance Criteria to exclude the effects of any of the following events that occurs during a performance period: (1) asset

write-downs, (2) litigation, claims, judgments or settlements, (3) changes in tax law or other such laws or provisions affecting reported results, (4) reorganization and restructuring programs and (5) payments made or due under this Plan or any other compensation arrangement maintained by the Company.

Restrictions. The Committee shall have the power to impose such other restrictions on Awards subject to this Paragraph as it may deem necessary or appropriate to ensure that such Awards satisfy all requirements for “performance-based compensation” within the meaning of Section 162(m).

Limitations on Grants to Individual Participants. In no event may Awards that are denominated in shares and that are intended to be “performance-based compensation” under Section 162(m) be granted or awarded to any Employee covering more than 1,000,000 shares in the aggregate (taking into account all such share-based Awards) in any one calendar year, subject to the adjustment provisions of Paragraph 13 of the Plan only to the extent that such adjustment will not affect the status of any Award intended to qualify as “performance-based compensation” under Section 162(m). During any calendar year no Participant may be granted Performance Awards that are intended to comply with the performance-based exception under Section 162(m) and are denominated in cash under which more than $5,000,000 may be earned for each 12 months in the performance period. If an Award is cancelled, the cancelled Award shall continue to be counted toward the applicable limitation in this Paragraph.

Termination of Employment and Change in Control.

Transferability of Awards.

Awards shall not be transferable other than by will or by the laws of descent and distribution. The rights of a Participant under this Plan shall not be assignable or transferable pursuant to a qualified domestic relations order as defined in the Code or Title I of the Employee Retirement Income Security Act or the rules thereunder.

During the lifetime of a Participant, an Option shall be exercisable only by the recipient of such Option, or by his/her legal representative.

Adjustments.

Amendments and Modifications of the Plan.

Tax Withholding.

Right of Discharge Reserved; Claims to Awards.

Stop Transfer Orders.

Severability.

Construction.

Unfunded Status of the Plan.

Non-U.S. Employees.

Governing Law.

Termination of the Plan.

Section 409A.