JACOBS ENGINEERING GROUP INC. AMENDED AND RESTATED EXECUTIVE DEFERRAL PLAN

“Annual Installment Method” shall be an annual installment payment over the number of years selected by the Participant in accordance with this Plan, calculated as follows: The Account Balance of the Participant shall be calculated as of the close of business on the last business day of the Plan Year, in the case of an installment payment under Section 5.2, and on the last business day prior to the Participant’s death, in the case of an installment payment under Section 6.2. The annual installment shall be calculated by multiplying this balance by a fraction, the numerator of which is one, and the denominator of which is the remaining number of annual payments due the Participant. By way of example, if the Participant elects a 10-year Annual Installment Method, the first payment shall be 1/10 of the Account Balance, calculated as described in this definition. The following year, the payment shall be 1/9 of the Account Balance, calculated as described in this definition. Each annual installment paid shall be divided by 12, and the resulting number shall be the monthly installment payment that shall be paid each month of the Plan Year to which such

annual installment relates. Subject to the payment provisions of Section 5.2 or 6.2, as the case may be, the monthly installment payment shall be paid as soon as practicable after the first day of the month to which it relates.

“Deduction Limitation” shall mean, with respect to those distributions otherwise payable to a Participant (or his or her Beneficiary) under the Plan which are specifically subject to this Deduction Limitation, that amount which, when combined with other compensation paid to a Participant (or his or her Beneficiary) for a taxable year, would not be deductible by the Employer by reason of the limitation imposed by Code Section 162(m). The Deduction Limitation shall be determined by the Company in good faith. Once an amount has been determined by the Company to be subject to the Deduction Limitation, the Company may, at its sole discretion, defer the amount that would otherwise be paid to a Participant (or his or her Beneficiary). Any amounts so deferred will remain in the Participant’s Account Balance, and shall be entitled to continued crediting and debiting of additional amounts in

accordance with Section 3.4 below. The amounts so deferred and amounts credited thereon shall be distributed to the Participant or his or her Beneficiary at the earliest possible date, as determined by the Employer in good faith, on which the deductibility of compensation paid or payable to the Participant for the taxable year of the Employer during which the distribution is made will not be limited by Section 162(m), or if earlier, the effective date of a Change in Control. Notwithstanding anything to the contrary in this Plan, the Deduction Limitation shall not apply to distributions that become payable after a Change in Control.

Minimum and Maximum Deferral Commitment. For each Plan Year, a Participant may make an irrevocable election to defer, as his or her Annual Deferral Amount, an amount of Base Annual Salary, Annual Bonus and/or Director’s Fees

that may not be less than the minimum Annual Deferral Amount, nor more than the maximum Annual Deferral Amount, as announced by the Committee prior to the beginning of the Plan Year and set forth in the Election Form for the Plan Year.

Election of Measurement Funds. At the time an Employee becomes a Participant in the Plan, he or she shall designate one or more Measurement Funds which shall be used to determine what additional amounts are to be credited or debited, as the case may be, to his or her Account Balance. Such designations shall apply to the Annual Deferral Amount, as such amounts are deferred by the Participant, and shall remain in force until changed by the Participant in accordance with the policies and procedures as set forth by the Committee, from time to time, which policies and procedures may be changed, modified, and/or amended by the Committee, without prior notice, at the Committee’s sole discretion. Until changed by the Committee: (i) Measurement Fund allocation designations must be made in whole percentage points of 5%, or multiples thereof, not to exceed 100%; (ii) a Participant may change his or hers Measurement Fund allocation elections once per calendar quarter, at any time during such quarter, but no later than the third business day prior to the end of such calendar quarter, and (iii) a change in Measurement Fund allocations will take effect at the beginning of the first calendar quarter immediately

following the date of change. Notice of any change in Measurement Fund elections must be made to the Committee, or its designee, in a form acceptable to it as determined by it in its sole discretion.

Termination. Although it is anticipated that the Plan will continue for an indefinite period of time, there is no guarantee that the Company will continue the Plan. Accordingly, the Company reserves the right to discontinue its sponsorship of the Plan and/or to terminate the Plan at any time with respect to any Employer by action of the Board. Upon the termination of the Plan with respect to any Employer, the Plan Agreements of the affected Participants who are employed by that Employer, or in the service of that Employer as Directors, shall terminate and their Account Balances, determined as if they had experienced a Termination of Employment on the date of Plan termination or, if Plan termination occurs after the date upon which a Participant was eligible to Retire, then with respect to that Participant as if he or she had Retired on the date of Plan termination, shall be paid to the Participants as follows: Prior to a Change in Control, if the Plan is terminated with respect to all of its Participants, an Employer shall have the right, in its sole discretion, and notwithstanding any elections made by the Participant, to pay such benefits in a lump sum or pursuant to an Annual Installment Method of up to 15 years, with amounts credited and debited during the installment period as provided herein. If the Plan is terminated with respect to less than all of its Participants, an Employer shall be required to pay such benefits in a lump sum. After a Change in Control, the Employer shall be required to pay such benefits in a lump sum. The termination of the Plan shall not adversely affect any Participant or Beneficiary who has become entitled to the payment of

any benefits under the Plan as of the date of termination; provided however, that the Employer shall have the right to accelerate installment payments without a premium or prepayment penalty by paying the Account Balance in a lump sum or pursuant to an Annual Installment Method using fewer years (provided that the present value of all payments that will have been received by a Participant at any given point of time under the different payment schedule shall equal or exceed the present value of all payments that would have been received at that point in time under the original payment schedule).

Committee Duties. Except as otherwise provided in this Article 12, this Plan shall be administered by a Committee appointed by the Board, which Committee may consist, in part or in full, of persons who are not on the Board. Members of the Committee may be Participants under this Plan. The Committee shall also have the discretion and authority to (i) make, amend, interpret, and enforce all appropriate rules and regulations for the administration of this Plan and (ii) decide or resolve any and all questions including

interpretations of this Plan, as may arise in connection with the Plan. Any individual serving on the Committee who is a Participant shall not vote or act on any matter relating solely to himself or herself. When making a determination or calculation, the Committee shall be entitled to rely on information furnished by a Participant or the Company.

Employer Information. To enable the Committee and/or Administrator to perform its functions, the Company and each Employer shall supply full and timely information to the Committee and/or Administrator, as the case may be, on all matters relating to the

compensation of its Participants, the date and circumstances of the Retirement, Disability, death or Termination of Employment of its Participants, and such other pertinent information as the Committee or Administrator may reasonably require.

Review of a Denied Claim. Within 60 days after receiving a notice from the Committee that a claim has been denied, in whole or in part, a Claimant (or the Claimant’s duly authorized representative) may file with the Committee a written request for a review of

the denial of the claim. Thereafter, but not later than 30 days after the review procedure began, the Claimant (or the Claimant’s duly authorized representative):

Incompetent. If the Committee determines in its discretion that a benefit under this Plan is to be paid to a minor, a person declared incompetent or to a person incapable of handling the disposition of that person’s property, the Committee may direct payment of such benefit to the guardian, legal representative or person having the care and custody of such minor, incompetent or incapable person. The Committee may require proof of minority, incompetence, incapacity or guardianship, as it may deem appropriate prior to distribution

of the benefit. Any payment of a benefit shall be a payment for the account of the Participant and the Participant’s Beneficiary, as the case may be, and shall be a complete discharge of any liability under the Plan for such payment amount.

Legal Fees to Enforce Rights After Change in Control. The Company and each Employer is aware that upon the occurrence of a Change in Control, the Board or the board of directors of a Participant’s Employer (which might then be composed of new members) or a shareholder of the Company or the Participant’s Employer, or of any successor corporation might then cause or attempt to cause the Company, the Participant’s Employer or such successor to refuse to comply with its obligations under the Plan and might cause or attempt to cause the Company or the Participant’s Employer to institute, or may institute, litigation seeking to deny Participants the benefits intended under the Plan. In

these circumstances, the purpose of the Plan could be frustrated. Accordingly, if, following a Change in Control, it should appear to any Participant that the Company, the Participant’s Employer or any successor corporation has failed to comply with any of its obligations under the Plan or any agreement thereunder or, if the Company, such Employer or any other person takes any action to declare the Plan void or unenforceable or institutes any litigation or other legal action designed to deny, diminish or to recover from any Participant the benefits intended to be provided, then the Company and the Participant’s Employer irrevocably authorize such Participant to retain counsel of his or her choice at the expense of the Company and the Participant’s Employer (who shall be jointly and severally liable) to represent such Participant in connection with the initiation or defense of any litigation or other legal action, whether by or against the Company, the Participant’s Employer or any director, officer, shareholder or other person affiliated with the Company, the Participant’s Employer or any successor thereto in any jurisdiction.