EXHIBIT 10.5

 
                         JACOBS ENGINEERING GROUP INC.

                      1991 EXECUTIVE DEFERRAL PLAN 
                                     (EDP)


                            Effective June 1, 1991

 
                               TABLE OF CONTENTS

                                                                            Page
                                                                            ----

Purpose      ...............................................................  1

Article 1 -  Definitions ...................................................  1

Article 2 -  Eligibility ...................................................  4
    2.1      Eligibility and Participation .................................  4
    2.2      Enrollment Requirements .......................................  4

Article 3 -  Deferral Commitments ..........................................  4
    3.1      Minimum Deferral ..............................................  4
    3.2      Maximum Deferral ..............................................  4
    3.3      Fixed Deferral Amount .........................................  4
    3.4      Deferral Commitment Period ....................................  5
    3.5      Withholding of Deferral Amounts ...............................  5
    3.6      FICA Taxes ....................................................  5
    3.7      Interest Crediting Prior to Distribution ......................  5
    3.8      Hardship ......................................................  6

Article 4 -  Pre-Retirement Distribution ...................................  6
    4.1      Eligibility for Pre-Retirement Distribution ...................  6
    4.2      Amount of Distribution ........................................  6

Article 5 -  Retirement Benefit ............................................  7
    5.1      Eligibility for Retirement Benefit ............................  7
    5.2      Retirement Benefit - Payment ..................................  7
    5.3      Retirement Benefit - Amount ...................................  7
    5.4      Death Prior to Completion of Retirement Benefit ...............  8

Article 6 -  Survivor Benefit ..............................................  8
    6.1      Eligibility for Survivor's Benefit ............................  8
    6.2      Survivor's Benefit - Method of Payment ........................  8
    6.3      Survivor's Benefit - Amount ...................................  8
    6.4      Suicide .......................................................  8

Article 7 -  Termination Benefit ...........................................  9
    7.1      Eligibility for Termination Benefit ...........................  9
    7.2      Termination Benefit ...........................................  9

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Article 8 -  Disability ....................................................  9
    8.1      Eligibility for Disability Waiver .............................  9
    8.2      Benefits ...................................................... 10
    8.3      Long-Term Disability - Termination ............................ 10

Article 9 -  Beneficiary ................................................... 10
    9.1      Beneficiary ................................................... 10
    9.2      Beneficiary Designation; Change ............................... 10
    9.3      Acknowledgment ................................................ 10
    9.4      No Beneficiary Designation .................................... 10
    9.5      Doubt as to Beneficiary ....................................... 10
    9.6      Discharge of Obligations ...................................... 10

Article 10 - Leave of Absence .............................................. 11
    10.1     Authorized Leave of Absence ................................... 11

Article 11 - Employer/Participant Liability ................................ 11
    11.1     General Assets ................................................ 11
    11.2     Employer's Liability .......................................... 11
    11.3     Limitation of Obligation ...................................... 11
    11.4     Participant Cooperation ....................................... 11
    11.5     Unsecured General Creditor .................................... 11

Article 12 - No Guarantee of Employment .................................... 12
    12.1     No Guarantee of Employment .................................... 12

Article 13 - Termination, Amendment or Modification of the Plan ............ 12
    13.1     Termination ................................................... 12
    13.2     Amendment ..................................................... 12
    13.3     Termination of Plan Agreement ................................. 12
    13.4     Change in Control ............................................. 12
    13.5     Termination, Modification or Amendment Following 
              Change in Control ............................................ 14
    13.6     Legal Fees To Enforce Rights After Change in Control .......... 14
    13.7     Vesting ....................................................... 15

Article 14 - Other Benefits and Agreements ................................. 15
    14.1     Coordination with Other Benefits .............................. 15

Article 15 - Restrictions on Alienation of Benefits ........................ 15
    15.1     Nonassignability .............................................. 15

                                     -ii-

 
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Article 16 - Administration of the Plan .................................... 15
    16.1     Committee Administration ...................................... 15
    16.2     Committee Authority ........................................... 15
    16.3     Committee Indemnity ........................................... 15
    16.4     Employer's Obligations to the Committee ....................... 16
    16.5     Committee Discretion in Payment Schedule ...................... 16
 
Article 17 - Claims Procedures ............................................. 16
    17.1     Presentation of Claim ......................................... 16
    17.2     Notification of Decision ...................................... 16
    17.3     Review of a Denied Claim ...................................... 17
    17.4     Decision on Review ............................................ 17
 
Article 18 - Trust ......................................................... 17
    18.1     Establishment of the Trust .................................... 17
    18.2     Interrelationship of the Plan and the Trust ................... 17
 
Article 19 - Miscellaneous ................................................. 18
    19.1     Notice ........................................................ 18
    19.2     Successors .................................................... 18
    19.3     Spouse's Interest ............................................. 18
    19.4     Governing Law ................................................. 18
    19.5     Pronouns ...................................................... 18
    19.6     Headings ...................................................... 18
    19.7     Validity ...................................................... 18
                                     -iii-

 
                            EXECUTIVE DEFERRAL PLAN

                                      OF

                         JACOBS ENGINEERING GROUP INC.


                                    Purpose

The purpose of this plan is to provide specified benefits to a select group of
key employees who contribute materially to the continued growth, development and
future business success of JACOBS ENGINEERING GROUP INC. and its subsidiaries.

                                   Article 1 
                                  Definitions

For purposes hereof, unless otherwise clearly apparent from the context, the
following phrases or terms shall have the following indicated meanings:

1.1  "Account Balance" shall mean the sum of (i) the Deferral Amount and (ii)
     interest credited in accordance with all the applicable interest crediting
     provisions of this Plan, less all distributions made in accordance with the
     Plan.

1.2  "Annual Bonus" shall mean any compensation paid under the Employer's
     Incentive Bonus Plan.

1.3  "Base Annual Salary" shall mean the annual compensation that is to be paid
     to a Participant for each Plan Year, determined as of the first day of that
     year, excluding bonuses, commissions, overtime and non-monetary awards for
     employment services to the Employer.

1.4  "Beneficiary" shall mean the person or persons, or the estate of a
     Participant, designated in accordance with Article 9, who is entitled to
     receive benefits under this Plan upon the death of a Participant.

1.5  "Beneficiary Designation Form" shall mean the form established from time to
     time by the Board that a Participant completes, signs and returns to the
     Committee to designate one or more Beneficiaries.

1.6  "Board" shall mean the Board of Directors of the Company.

1.7  "Change in Control" shall have the meaning set forth in Section 13.4.

1.8  "Claimant" shall have the meaning set forth in Section 17.1.

                                      -1-

 
1.9  "Committee" shall mean the administrative committee appointed to manage and
     administer the Plan in accordance with the provisions of Article 16.

1.10 "Company" shall mean JACOBS ENGINEERING GROUP INC.

1.11 "Continuing Director" shall mean a director described in Section 13.4(b).

1.12 "Deferral Amount" shall be the sum of all of a Participant's Base Annual
     Salary deferrals, Annual Bonus deferrals and, if applicable, Directors Fees
     deferrals.

1.13 "Deferral Commitment Period" shall mean the period described in Section 3.4
     of this Plan.

1.14 "Director" shall mean any member of the Board.

1.15 "Directors Fees" shall mean the annual fees paid by the Company, including
     retainer fees and meetings fees, as compensation for serving on the Board.

1.16 "Disability" shall mean a period of disability during which a Participant
     qualifies for benefits under the Company's or any of its subsidiaries' 
     long-term disability program.

1.17 "Election Form" shall mean the form established from time to time by the
     Board that a Participant completes, signs and returns to the Committee to
     make an election under the Plan.

1.18 "Employee" shall mean any person who is in the regular full-time employment
     of an Employer as determined by the personnel policies and practices of the
     Employer.

1.19 "Employer" shall mean the Company and any subsidiaries of the Company that
     have been selected by the Board to participate in the Plan.

1.20 "Moody's Rate" shall mean the interest rate determined and announced by the
     Committee at any time before the commencement of each Plan Year. The
     Moody's Rate for a Plan Year shall be the most current monthly "Seasoned
     Corporate Bond" rate published by Moody's Investors Service, Inc., or any
     successor to that service, available prior to the announcement by the
     Committee. For the first Plan Year, the Moody's Rate shall be 9.43%. The
     Seasoned Corporate Bond rate is an economic indicator, based on an
     arithmetic average of the yields of representative bonds, including
     industrials, public utilities, Aaa, A, and Baa bonds, and is calculated as
     a monthly average of the composite yield.

1.21 "Participant" shall mean any Employee or Director who (i) is selected to
     participate in the Plan, (ii) elects to participate in the Plan, (iii)
     signs a Plan Agreement, an Election Form and a Beneficiary Designation
     Form, (iv) the signed Plan Agreement, Election Form and Beneficiary
     Designation Form are returned to and accepted by the Committee and (v)
     neither the Plan nor the Plan Agreement has terminated.

                                      -2-

 
1.22 "Participation Year" shall mean with respect to any Participant, any Plan
     Year in which a Participant is at any time during such year a Participant.
     Notwithstanding the previous sentence, "Participation Year" shall not
     include any years prior to the first Plan Year in which a Participant
     actually has any amount deferred under this Plan.

1.23 "Plan" shall mean the 1991 Executive Deferral Plan of the Employer which is
     defined by this instrument and by each Plan Agreement.

1.24 "Plan Agreement" shall mean the form of written agreement which is entered
     into by and between the Employer and a Participant. Each Plan Agreement
     executed by a Participant shall provide for the entire benefit to which
     such Participant is entitled to under the Plan, and the Plan Agreement
     bearing the latest date shall govern such entitlement.

1.25 The "Plan Year" shall, for the first Plan Year, begin on June 1, 1991, and
     end on December 31, 1991. For each Plan Year thereafter, the Plan Year
     shall begin on January 1 of each year and continue through December 31 of
     the same year.

1.26 "Pre-Retirement Distribution" shall mean the distribution provided for in
     Article 4.

1.27 "Retirement Benefit" shall mean the retirement benefit provided for in
     Article 5.

1.28 "Retirement Date" shall be the earlier of the first day of the month in
     which the Participant (i) attains the age of sixty-five (65), (ii) is sixty
     (60) years of age or older and has completed ten (10) Years of Service, or
     (iii) is terminated as a result of a long-term disability under the
     Employer's policies and practices.

1.29 "Retirement Distribution Date" shall mean the last day of the month in
     which a Participant has both (i) reached or passed his or her Retirement
     Date and (ii) has actually ceased being an Employee or Director other than
     by death.

1.30 "Survivor's Benefit" shall mean the benefit provided for in Article 6.

1.31 "Termination Benefit" shall mean the termination benefit provided for in
     Section 7.2.

1.32 "Termination of Employment" shall mean with respect to an Employee or
     Director the cessation of employment or a Director's position, as the case
     may be, voluntarily or involuntarily, and, except as provided in Article 8
     and Article 10, shall exclude cessation as a result of an authorized leave
     of absence, retirement, Disability or death. If a Participant is both an
     Employee and a Director, Termination of Employment shall occur only upon
     the termination of last held position.

1.33 "Trust" shall mean the trust established pursuant to that certain Trust
     Agreement, dated as of June 1, 1991, between the Company and the Trustee
     named therein, as amended from time to time.

1.34 "Unforeseeable Financial Emergency" shall have the meaning set forth in
     Section 3.8(b).

                                      -3-

 
1.35 "Years of Service" shall mean the total number of years, that a Participant
     is an Employee or a Director, including, without limitation, periods of
     Disability and leaves of absence prior to Termination of Employment, as
     provided under Article 8 and Article 10.

                                   Article 2 
                                  Eligibility

2.1  Eligibility and Participation. The Committee, in its sole discretion, shall
     -----------------------------
     establish eligibility qualifications for participation in the Plan.
     Participation shall be limited to a select group of management and highly
     compensated employees of the Employer.

2.2  Enrollment Requirements. As a condition of participation, each Participant
     -----------------------
     so selected shall complete, sign and return to the Committee a Plan
     Agreement, an Election Form and a Beneficiary Designation Form, and shall
     comply with all further conditions that may be established by the
     Committee.

                                  Article 3 
                             Deferral Commitments
3.1  Minimum Deferral.  A Participant must defer during each Plan Year of the
     ----------------
     Deferral Commitment Period at least one of the following minimum amounts:

    (a)  In the case of an Employee, $2,000 of his or her Base Annual Salary; or

    (b)  In the case of a Director who is not an Employee, a percentage that is
         anticipated to equal $2,000 of his or her Directors Fees.

    A Participant shall not be permitted to defer any portion of his or her
    Annual Bonus unless he or she meets one of the minimum Deferral requirements
    set forth in this Section. If a Participant first becomes a Participant
    after the first day of a Plan Year, or in the case of the first Plan Year of
    the Plan itself, at the election of the Employee on the Election Form, the
    minimum deferral described in (a) shall be an amount equal to $2,000,
    multiplied by a fraction, the numerator of which is the number of complete
    months remaining in the Plan Year and the denominator of which is 12.

3.2  Maximum Deferral. For each Plan Year of the Deferral Commitment Period, a
     ----------------
     Participant may defer up to fifty percent (50%) of his or her Base Annual
     Salary, fifty percent (50%) of his or her Annual Bonus (except as noted in
     Section 3.5) and, if applicable, up to one hundred percent (100%) of his or
     her Directors Fees.

3.3  Fixed Deferral Amount. Except as provided in Section 3.5, the annual
     ---------------------
     deferral selected by a Participant shall be the same for each Plan Year of
     the Deferral Commitment Period. A Base Annual Salary deferral shall be a
     fixed dollar amount, and an Annual Bonus or Directors Fees deferral shall
     be a fixed percentage of the applicable annual bonus or fee.

                                      -4-

 
     In no event shall an annual deferral amount be decreased during the
     Deferral Commitment Period. An annual deferral amount may only be increased
     (i) prior to the commencement of the Plan Year to which such annual
     deferral amount relates and (ii) with the approval of the Committee.

3.4  Deferral Commitment Period. The "Deferral Commitment Period" for each
     --------------------------
     Participant shall be a fixed period of four (4) consecutive Plan Years
     commencing with the 1991 Plan Year unless otherwise designated by the
     Committee.

3.5  Withholding of Deferral Amounts. The portion of the Base Annual Salary
     -------------------------------
     elected to be deferred annually shall be withheld in equal amounts over the
     Plan Year. The portion of Annual Bonus and Directors Fees being deferred
     shall be withheld at the time the Annual Bonus or Directors Fees would
     otherwise be paid to the Participant. Notwithstanding the above, for such
     first Plan Year, Participants can elect to:

     (a)  Defer the total Base Annual Salary deferral in that first Plan Year,

     (b)  Defer an amount equal to the amount in Article 3.5(a) above multiplied
          by a fraction, the numerator of which is the number of complete months
          remaining in the first Plan Year, and the denominator of which is
          twelve (12).

     (c)  Defer from Base Annual Salary an amount equal to Article 3.5(b),
          above. In addition, the difference between Articles 3.5(a) and 3.5(b)
          would be deferred from the Annual Bonus for the first Plan Year (in
          addition to any Annual Bonus election). For the first Plan Year only,
          the total Annual Bonus deferral could exceed fifty percent (50%) by
          nature of this provision.

3.6  FICA Taxes. For each Plan Year of the Deferral Commitment Period, the
     ----------
     Employer shall ratably withhold from that portion of the Participant's Base
     Annual Salary and/or Annual Bonus that is not being deferred, the
     Participant's share of FICA taxes based on an amount equal to the Base
     Annual Salary and/or Annual Bonus before reduction by the amount deferred.
     If necessary, the Committee shall reduce the amount deferred in order to
     comply with this Section 3.6.

3.7  Interest Crediting Prior to Distribution.
     ----------------------------------------
     (a)  Except as provided in Section 3.7(b) and Section 3.7(c) below,
          interest shall be credited annually on a Participant's Account Balance
          at 125% of the Moody's Rate. For purposes of this crediting, all
          amounts deferred during a Plan Year shall be treated as having been
          deferred as of the beginning of the Plan Year. Such interest crediting
          shall be made up to the date of the Pre-Retirement Distribution, the
          Retirement Date, the date of the Participant's death or the date of
          Termination of Employment, depending on whether the benefit is paid
          under Article 4, 5, 6 or 7, respectively.

                                      -5-

 
     (b)  In the event of a Termination of Employment, interest shall be
          credited in the manner provided in Section 3.7(a), but at the rate
          provided for in Section 7.2.


     (c)  In the event of a Participant's suicide, interest shall be credited in
          accordance with Section 6.4.

3.8  Hardship.
     --------
     (a)  If a Participant experiences an Unforeseeable Financial Emergency as
          described in Section 3.8(b) below, the Participant may petition the
          Committee to (i) suspend any deferrals required by the Plan Agreement
          and/or (ii) receive a distribution from the Plan. Any approval of such
          a petition shall be made at the sole discretion of the Committee. If
          the Committee approves a distribution, the distribution shall be made
          within sixty (60) days of the date of approval. The distribution may
          not exceed the Participant's Account Balance as of the last day of the
          month prior to the date of the Committee's approval of the petition,
          calculated as if such Participant were receiving a Termination Benefit
          as of such date.

     (b)  An "Unforeseeable Financial Emergency" shall mean an unexpected need
          for cash arising from an illness, casualty loss, sudden financial
          reversal, transfer of place of employment or other such unforeseeable
          occurrence, all as determined in the sole discretion of the Committee.

                                   Article 4
                          Pre-Retirement Distribution

4.1  Eligibility for Pre-Retirement Distribution. A Participant may elect to
     -------------------------------------------
     receive a Pre-Retirement Distribution from the Plan to be received in or
     after the eighth Participation Year. This election shall be irrevocable and
     shall be made on the Election Form, which form is to be delivered to the
     Committee prior to the commencement of the Deferral Commitment Period.

4.2  Amount of Distribution. The amount of the Pre-Retirement Distribution shall
     ----------------------
     be any amount not to exceed the electing Participant's Account Balance at
     the end of the Participation Year prior to the Participation Year selected
     on the Election Form for the distribution. The Pre-Retirement Distribution
     may not be made prior to the eighth (8th) Participation Year. At the
     election of the Participant (on the Election Form), this amount shall be
     distributed or, in the case of installment payments, shall start
     distribution within ninety (90) days of the January 1st of the
     Participation Year selected on the Election Form in one of the following
     manners:

     (a)  In a lump sum equal to the Total Account Balance at the end of the
          Participation Year prior to the Participation Year selected on the
          Election Form for the distribution; or

                                      -6-

 
     (b)  In a lump sum equal to a fixed dollar amount. Such fixed dollar amount
          shall be chosen by the Participant on the Election Form. Any remaining
          amounts in the Account Balance, after completion of the Pre-Retirement
          Distribution, shall remain in the Plan to be paid under the other
          provisions of the Plan; or

     (c)  In four or fewer annual consecutive installments of a fixed dollar
          amount. Such fixed dollar amount shall be chosen by the Participant on
          the Election Form. Interest on the unpaid Account Balance shall be
          credited at 125% of Moody's. Any remaining amounts in the Account
          Balance, after completion of the Pre-Retirement Distribution, shall
          remain in the Plan to be paid under the other provisions of the Plan;
          or

     (d)  In four or fewer annual consecutive installments so that the total
          Account Balance is completely distributed over the elected installment
          period. Interest on the unpaid Account Balance shall be credited at
          125% of Moody's.

     If the amount of Pre-Retirement Distribution elected by the Participant
     exceeds the total Account Balance at any time during the Pre-Retirement
     Distribution period, only the amount remaining in the Account Balance shall
     be distributed to the Participant and the Employer shall have no further
     liability under the Plan.

                                   Article 5
                              Retirement Benefit

5.1  Eligibility for Retirement Benefit. If the Participant ceases to be an
     ----------------------------------
     Employee or a Director for any reason other than death, including without
     limitation, retirement or a Termination of Employment after the Retirement
     Date, the Employer shall pay the Retirement Benefit to the Participant (or
     his or her Beneficiary) as provided in Section 5.2 and Section 5.3 below.

5.2  Retirement Benefit - Method of Payment. The Retirement Benefit may be paid
     --------------------------------------
     in a lump sum, or in installments over a period of 60, 120, or 180 months
     at the sole discretion of the Committee. The lump sum payment shall be
     made, or installment payments shall commence, within sixty (60) days of the
     Retirement Distribution Date and in the case of installment payments, shall
     continue until the Retirement Benefit is paid in full.

5.3  Retirement Benefit - Amount. If the Retirement Benefit is paid in a lump
     ---------------------------
     sum, it shall be the retired Participant's Account Balance determined as of
     the Retirement Distribution Date. If the Retirement Benefit is paid in
     installments, it shall be a constant monthly payment, determined at the
     beginning of each Plan Year by monthly amortization of the remaining
     Account Balance over the remaining payment period. Interest on the unpaid
     balance will be credited for the remaining periods at 125% of the Moody's
     Rate established for each of the subsequent Plan Years. 

                                      -7-

 
5.4  Death Prior to Completion of Retirement Benefit. If the Participant dies
     -----------------------------------------------
     after the Retirement Date and prior to the completion of the Retirement
     Benefit payments, the retired Participant's designated Beneficiary will
     receive any unpaid Retirement Benefit payments due the Participant, either
     at the times they were to be received by the Participant, or in a lump sum,
     as determined by the Committee in its sole discretion. If this Section 5.4
     applies, a designated Beneficiary shall not be entitled to any benefits
     provided for under Article 6.

                                   Article 6
                               Survivor Benefit

6.1  Eligibility for Survivor's Benefit. If a Participant dies before the
     ----------------------------------
     Retirement Date and before Termination of Employment, the Employer shall
     pay the Survivor's Benefit to the deceased Participant's Beneficiary,
     provided that all of the following conditions are met:

     (a)  the Participant's death was determined not to be from a bodily or
          mental cause or causes, the information about which was withheld,
          knowingly concealed, or falsely provided by the Participant, when
          requested by the Employer to furnish evidence of good health; and

     (b)  proof of the Participant's death is furnished to the Committee in such
          form as determined acceptable by the Committee.

6.2  Survivor's Benefit - Method of Payment. The Survivor's Benefit may be paid
     --------------------------------------
     in a lump sum, or in installments over a period of 60, 120, or 180 months
     at the sole discretion of the Committee. The lump sum payment shall be
     made, or installment payments shall commence within sixty (60) days of the
     date the Participant died and in the case of installment payments, shall
     continue until the Survivor's Benefit is paid in full.

6.3  Survivor's Benefit - Amount. If the Survivor's Benefit is paid in a lump
     ---------------------------
     sum, it shall be the retired Participant's Account Balance determined as of
     the date the Participant died. If the Survivor's Benefit is paid in
     installments, it shall be a constant monthly payment, determined at the
     beginning of each Plan Year by monthly amortization of the remaining
     Account Balance over the remaining payment period. Interest on the unpaid
     balance will be credited for the remaining periods at 125% of the Moody's
     Rate established for each of the subsequent Plan Years.

6.4  Suicide. In the event of a Participant's suicide within twenty-four months
     -------
     of the first deferral of any Deferral Commitment Period, the Employer shall
     be obligated to pay to the Participant's designated Beneficiary the
     Participant's portion of the Deferral Amount, without interest, and no
     other Survivor's Benefit shall be payable. 

                                      -8-

 
                                   Article 7
                              Termination Benefit

7.1  Eligibility for Termination Benefit. If a Participant experiences a
     -----------------------------------
     Termination of Employment prior to the Retirement Date, the Employer shall
     pay to the Participant the Termination Benefit.

7.2  Termination Benefit. The Termination Benefit is a sum equal to the
     -------------------
     Participant's Account Balance determined as provided in this Section 7.2,
     as of the date of Termination of Employment, and shall be paid in a lump
     sum within ninety (90) days following the Termination of Employment. In
     determining the Account Balance for purposes of this Article 7 only,
     interest shall be calculated in the manner provided in Section 3.7(a)
     above, but using the applicable interest rate set forth in the following
     schedules:

               Number of                                  Interest
           Participation Years                         Crediting Rate
           -------------------                         --------------

For Employees:
- ------------- 

            Less than 2 years                                 0
        More than 2 but less than 7                      Moody's Rate
                 7 or more                           125% of Moody's Rate
 
For Directors:
- ------------- 

                 All years                           125% of Moody's Rate
 
 
     In the event a Participant is both an Employee and Director, interest 
     shall be credited under the Employee schedule.

                                   Article 8
                                  Disability

8.1  Eligibility for Disability Waiver. If a Participant suffers a Disability
     ---------------------------------
     during any Plan Year during the Deferral Commitment Period, the
     Participant's annual deferral amount for that Plan Year or any subsequent
     Plan Year shall, except as provided in this Section 8.1, be as set forth in
     his or her Election Form for the first six (6) months that a Participant
     suffers from a Disability, and the withholding of the Participant's monthly
     deferral amounts, calculated in accordance with Section 3.5, shall be met
     from the Participant's taxable portion of the disability benefit under the
     Employer's long-term disability program. Should the monthly deferral amount
     exceed one hundred percent (100%) of the taxable disability benefit, the
     Participant's deferral obligation shall be excused to the extent of that
     excess. If a Participant's Disability exceeds six (6) consecutive months,
     the Participant

                                      -9-

 
     shall be excused from making any additional deferrals while he or she is 
     suffering from a Disability.

8.2  Benefits. A Participant suffering a Disability, but not terminated as a
     --------     
     result of long-term disability under the Employer's policies and practices,
     shall continue to be considered a Participant and shall be eligible for the
     benefits provided for in Articles 4, 5, 6 or 7 in accordance with the
     provisions of those Articles.

8.3  Long-Term Disability - Termination. For a Participant who is terminated as
     ----------------------------------
     a result of disability under the Employer's policies and practices, the
     provisions of Article 5 shall apply for purposes of Account Balance
     distribution and interest crediting.

                                   Article 9
                                  Beneficiary

9.1  Beneficiary. Each Participant shall have the right, at any time, to
     -----------
     designate any person or persons as his or her Beneficiary or Beneficiaries
     (both primary as well as contingent) to receive any benefits payable under
     the Plan to a Beneficiary upon the death of a Participant.

9.2  Beneficiary Designation; Change. A Participant shall designate his or her
     -------------------------------
     Beneficiary or Beneficiaries by completing and signing the Beneficiary
     Designation Form, and returning it to the Committee. A Participant shall
     have the right to change a Beneficiary by completing, signing and otherwise
     complying with the terms of the Beneficiary Designation Form.

9.3  Acknowledgment. No designation or change in designation of a Beneficiary
     --------------
     shall be effective until received, accepted and acknowledged in writing by
     the Committee.

9.4  No Beneficiary Designation. If a Participant fails to designate a
     --------------------------
     Beneficiary as provided above, or if all designated Beneficiaries
     predecease the Participant or die prior to complete distribution of the
     Participant's benefits, then the Participant's designated Beneficiary shall
     be deemed to be his or her surviving spouse. If the Participant has no
     surviving spouse, the benefits remaining under the Plan to be paid to a
     Beneficiary shall be payable to the executor or personal representative of
     the Participant's estate.

9.5  Doubt as to Beneficiary. If the Committee has any doubt as to the proper
     -----------------------
     Beneficiary to receive payments pursuant to this Plan, they shall have the
     right to withhold such payments until this matter is resolved to their
     satisfaction.

9.6  Discharge of Obligations. The payment of benefits under the Plan to a
     ------------------------
     Beneficiary shall fully and completely discharge the Employer from all
     further obligations under this Plan with respect to the deceased
     Participant and all of his or her Beneficiaries. 

                                     -10-

 
                                  Article 10
                               Leave of Absence

10.1 Authorized Leave of Absence. If a Participant is authorized by the Employer
     ---------------------------
     for any reason to take a paid leave of absence from employment, such
     Participant shall continue to be considered employed as an Employee or
     Director and shall be required to maintain the level of deferrals set forth
     in his or her Plan Agreement in order to keep the Plan Agreement in full
     force and effect. If such leave of absence is unpaid, the Participant shall
     continue to be considered employed as an Employee or Director and will be
     excused from making deferrals until the unpaid leave of absence ends;
     provided, however, that if the unpaid leave of absence continues beyond
     three consecutive months, the Participant shall be treated as having
     incurred a Termination of Employment as of the end of such three month
     period and the Participant shall receive the Termination Benefit in
     accordance with Article 7. In the case of a conflict between this Article
     10 and Article 8, Article 8 shall prevail.

                                  Article 11
                        Employer/Participant Liability

11.1  General Assets.  Amounts payable to a Participant shall be paid from the
      --------------
      general assets of the Employer exclusively.

11.2  Employer's Liability.  The Employer's liability for the payment of
      --------------------
      benefits shall be defined only by this Plan, as entered into between the
      Employer and a Participant.

11.3  Limitation of Obligation.  The Employer shall have no obligation to a
      ------------------------
      Participant under the Plan, except as expressly provided for in the Plan.

11.4  Participant Cooperation. The Participant must cooperate with the Employer
      -----------------------
      and the Committee in furnishing all information requested by the Employer
      and/or Committee in order to facilitate the payment of benefits, and the
      administration and operations of this Plan. Such information may include
      taking a physical examination, or other actions, and such cooperation
      shall extend beyond the termination of the Plan Agreement and the
      Employee's Participation in the Plan.

11.5  Unsecured General Creditor. Participants, their Beneficiaries and their
      --------------------------
      permitted heirs, successors and assigns shall have no legal or equitable
      rights, interest or claims in any property or assets of the Employer. Any
      and all of the Employer's assets shall be, and remain, the general,
      unpledged unrestricted assets of the Employer. The Employer's obligations
      under the Plan shall be merely that of an unfunded and unsecured promise
      of the Employer to pay money in the future. 

                                     -11-

 
                                  Article 12
                          No Guarantee of Employment

12.1  No Guarantee of Employment. Nothing in this Agreement shall be construed
      --------------------------
      as altering in any manner the employment relationship with an Employee or
      Director, which is hereby acknowledged to be an "at will" employment
      relationship that can be terminated at any time for any reason, with or
      without cause, unless otherwise expressly provided in a written employment
      agreement. All terms and conditions of an Employee's or Director's current
      employment shall remain the same. Nothing in this Plan creates, or is
      meant to create, any obligation on the part of the Employer to keep an
      Employee or Director employed by the Employer or not to terminate an
      Employee or Director at any time and for any reason.

                                  Article 13
              Termination, Amendment or Modification of the Plan

13.1  Termination. The Company reserves the right to terminate the Plan at any
      -----------
      time. Upon termination of the Plan, the Participant's Account Balance
      shall be paid out in accordance with the benefits that the Participant
      would receive if there had occurred a Termination of Employment with
      respect to the Participant on the date of Plan termination or, if such
      termination occurs after the Retirement Date, the Participant had retired
      on the date of Plan termination. Notwithstanding the above, the
      termination of the Plan shall not affect any Participant or Beneficiary
      who has become entitled to the payment of benefits under the Plan as of
      the date of termination.

13.2  Amendment. The Company may, at any time, amend or modify the Plan in whole
      ---------
      or in part, provided, however, that no amendment or modification shall be
      effective to decrease or restrict a Participant's Account Balance in
      existence at the time the amendment or modification is made, calculated as
      if there had occurred a Termination of Employment with respect to such
      Participant as of the effective date of the amendment or, if such
      amendment occurs after the Retirement Date, the Participant had retired as
      of the effective date of the amendment. The amendment or modification of
      the Plan shall not affect any Participant or Beneficiary who has become
      entitled to the payment of benefits under the Plan as of the date of the
      amendment or modification.

13.3  Termination of Plan Agreement. Absent the earlier termination,
      -----------------------------
      modification or amendment of the Plan, the Plan Agreement of any
      Participant shall terminate upon the full payment of the applicable
      benefit provided under Articles 4, 5, 6, or 7, as the case may be.

13.4  Change in Control.
      -----------------
      (a)  All benefits accrued under the Plan as of the date of a Change of
           Control shall thereafter be paid in accordance with the terms and
           conditions of this Plan. However, if at any time during a period of
           three years following a Change of Control 

                                     -12-

 
          of the Company, the employment of a participant by the Employer is
          terminated (i) by the Employer for any reason other than for Cause, or
          (ii) by the Participant for just reason, then all benefits, including
          all interest at the full 125% of Moody's rate shall apply and not at
          the rates applicable in Section 7.2. Such amounts will thereupon be
          immediately due and payable in full, less any withholdings required by
          law, to such Participant, and within ten business days thereafter the
          Employer, or any successor corporation of the Employer shall deliver
          payment of such Account Balance to such Participant.

          A Participant shall be deemed to have terminated his or her employment
          for just reason if he or she resigns voluntarily after a demotion, a
          material reduction in his or her authority or responsibility or any
          reduction in his or her compensation or after being notified of a
          relocation of his or her work place that would materially increase the
          commuting distance from his or her then current principal residence.

         A Participant shall be deemed to have been terminated by the Employer
         for cause only if such participant has been terminated by reason of (i)
         a willful failure by such Participant to substantially perform his or
         her duties other than a failure resulting from the Participant's
         incapacity due to physical or mental illness, or (ii) a willful act by
         the Participant that constitutes gross misconduct and is materially
         injurious to the Employer. No act or failure to act by a Participant
         shall be considered "willful" unless committed without good faith and
         without a reasonable belief that the act of omission was in the best
         interests of the Employer.

      (b)  As used in this Plan, "Change of Control" means the occurrence of any
           of the following events:

           (i)   Any "person" (as such term is used in Sections 13(d) and 14(d)
                 of the Securities Exchange Act of 1934, hereinafter "Person")
                 becomes the beneficial owner, directly or indirectly, of
                 securities of the Company representing twenty-five percent 
                 (25%) or more of the combined voting power of the Company's 
                 then outstanding securities ordinarily (and apart from rights
                 accruing under special circumstances) having the right to vote
                 at elections of directors;

           (ii)  A change in the composition of the Board as a result of which
                 fewer than two-thirds (2/3rds) of the incumbent directors are
                 Continuing Directors; or

           (iii) A change of control that would be required to be reported in a
                 proxy statement pursuant to Item 5(f) of Schedule 14A of
                 Regulation 14A under the Securities Exchange Act of 1934.

           An individual shall be considered a "Continuing Director" on a
           particular date if he or she either (i) had been a member of the
           Board twenty-four (24) months prior to such date or (ii) was elected,
           or nominated for election, to the Board with the affirmative votes of
           at least a majority of the members of the Board twenty-four  

                                     -13-

 
          (24) months prior to such date and who were still in office at
               the time of the election or nomination.

13.5  Termination, Modification or Amendment Following Change in Control.
      ------------------------------------------------------------------
      Following a Change in Control, neither the Company, any subsidiary of the
      Company nor any corporation, trust or other Person that succeeds to all or
      any substantial portion of the assets of the Company shall have the right
      to terminate, modify, or amend a Plan Agreement in effect prior to such
      Change in Control, and all benefits under such Plan Agreement shall
      thereafter be paid in accordance with the terms of such Plan Agreement as
      in effect immediately prior to such Change in Control. Any provision of
      this Plan to the contrary shall be construed in accordance with this
      Section 13.5.

13.6  Legal Fees To Enforce Rights After Change in Control. The Company is aware
      ----------------------------------------------------
      that upon the occurrence of a Change in Control, the Board (which might
      then be composed of new members) or a shareholder of the Company or of any
      successor corporation might then cause or attempt to cause the Company or
      such successor to refuse to comply with its obligations under the Plan and
      might cause or attempt to cause the Company 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. It is the intent of the Company that Participants not be
      required to incur the expenses associated with the enforcement of their
      rights under the Plan by litigation or other legal action, because the
      cost and expense thereof would substantially detract from the benefits
      intended to be extended to Participants hereunder, and that Participants
      not be bound to negotiate any settlement of their rights under the Plan
      under threat of incurring such expenses. Accordingly, if, following a
      Change in Control, it should appear to any Participant that the Company
      has failed to comply with any of its obligations under the Plan or any
      agreement thereunder or, if the Company or any other Person takes any
      action to declare the Plan or any agreement hereunder 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 to each Participant under the Plan, and such Participant
      has substantially complied with all of his or her obligations under the
      Plan and any such agreement, then the Company irrevocably authorizes such
      Participant from time to time to retain counsel of his or her choice at
      the expense of the Company to represent such Participant in connection
      with the initiation or defense of any litigation or other legal action,
      whether by or against the Company or any director, officer, shareholder or
      other person affiliated with the Company or any successor thereto in any
      jurisdiction. Notwithstanding any existing or prior attorney-client
      relationship between the Company and such counsel, the Company irrevocably
      consents to each Participant's entering into an attorney-client
      relationship with such counsel, and in that connection the Company and
      each Participant agree that a confidential relationship shall exist
      between each such Participant and his counsel. The Company shall pay or
      reimburse each Participant for all reasonable fees and expenses of counsel
      selected by such Participant from time to time on a regular, periodic
      basis from presentation of a statement or statements prepared by such
      counsel in accordance with its customary practices up to a maximum
      aggregate amount of $500,000.

                                     -14-

 
13.7  Vesting. Notwithstanding anything that may be construed to the contrary in
      -------
      this Plan, a Participant shall at all times be 100% vested in his or her
      Deferral Amount.

                                  Article 14
                         Other Benefits and Agreements

14.1  Coordination with Other Benefits. The benefits provided for a Participant
      --------------------------------
      and Participant's Beneficiary under the Plan are in addition to any other
      benefits available to such Participant under any other plan or program for
      employees of the Employer. The Plan shall supplement and shall not
      supersede, modify or amend any other such plan or program except as may
      otherwise be expressly provided.

                                  Article 15
                    Restrictions on Alienation of Benefits

15.1  Nonassignability. Neither a Participant nor any other person shall have
      ----------------
      any right to commute, sell, assign, transfer, pledge, anticipate, mortgage
      or otherwise encumber, transfer, hypothecate or convey in advance of
      actual receipt, the amounts if any, payable hereunder, or any part
      thereof. No part of the amounts payable shall, prior to actual payment, be
      subject to any claims of creditors and, in particular, they shall not be
      subject to attachment, garnishment, seizure or sequestration by any
      creditor for the payment of any debts, judgments, obligations, alimony or
      separate maintenance owed by a Participant.

                                  Article 16
                          Administration of the Plan

16.1  Committee Administration. The general administration of this Plan, as well
      ------------------------
      as construction and interpretation thereof, shall be the responsibility of
      the Committee, the number of members of which shall be designated and
      appointed from time to time by, and shall serve at the pleasure of the
      Board.

16.2  Committee Authority. Subject to the Plan, the Committee shall from time to
      -------------------
      time establish rules, forms and procedures for the administration of the
      Plan. Except as otherwise expressly provided, the Committee shall have the
      exclusive right to interpret the Plan and to decide any and all matters
      arising thereunder. The Committee's decisions shall be conclusive and
      binding upon all persons having or claiming to have any right or interest
      under the Plan.

16.3  Committee Indemnity. No member of the Committee shall be liable for any
      -------------------
      act or omission of any other member of the Committee, nor for any act or
      omission on his own part, excepting his or her own willful misconduct. The
      Employer shall indemnify and save harmless each member of the Committee
      against any and all expenses and liabilities

                                     -15-

 
      arising out of his or her membership on the Committee, with the exception
      of expenses and liabilities arising out of his or her own willful
      misconduct.

16.4  Employer's Obligations to the Committee. To enable the Committee to
      ---------------------------------------
      perform its functions, each Employer shall supply full and timely
      information to the Committee on all matters relating to the compensation
      of all Participants, their retirement, death, Disability or Termination of
      Employment, and such other pertinent facts as the Committee may require.

16.5  Committee Discretion in Payment Schedule. The Committee shall also have
      ----------------------------------------
      the power, at its sole discretion, to change the manner and timing of
      payments to be made to a Participant or Participant's Beneficiary from
      that set forth in the Participant's Plan Agreement, if requested to do so
      by such Participant or Beneficiary.

                                  Article 17
                               Claims Procedures

17.1  Presentation of Claim. Any Participant or Beneficiary of a deceased
      ---------------------
      Participant (such Participant or Beneficiary being referred to below as a
      "Claimant") may deliver to the Committee a written claim for a
      determination with respect to the amounts (i) credited to (or deducted
      from) such Claimant's Participant's Account Balance, or (ii) distributable
      to such Claimant from the Plan. If such a claim relates to the contents of
      a notice received by the Claimant, the claim must be made within 60 days
      after such notice was received by the Claimant. The claim must state with
      particularity the determination desired by the Claimant.

17.2  Notification of Decision.  The Committee shall consider a Claimant's claim
      ------------------------
      within a reasonable time, and shall notify the Claimant in writing:

       (a)  that the Claimant's requested determination has been made, and that
            the claim has been allowed in full; or

       (b)  that the Committee has reached a conclusion contrary, in whole or in
            part, to the Claimant's requested determination, and such notice
            must set forth in a manner calculated to be understood by the
            Claimant:

            (i)    the specific reason(s) for the denial of the claim, or any 
                   part of it;

            (ii)   specific reference(s) to pertinent provisions of the Plan 
                   upon which such denial was based;

            (iii)  a description of any additional material or information
                   necessary for the Claimant to perfect the claim, and an
                   explanation of why such material or information is necessary;
                   and

                                     -16-

 
            (iv)  an explanation of the claim review procedure set forth in 
                  Section 17.3.

17.3  Review of a Denied Claim. Within sixty (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 thirty (30) days after the review procedure
      began, the Claimant (or the Claimant's duly authorized representative):

      (a)  may review pertinent documents;

      (b)  may submit written comments or other documents; and/or

      (c)  may request a hearing, which the Committee, in its sole discretion, 
           may grant.

17.4  Decision on Review. The Committee shall render its decision on review
      ------------------
      promptly, and not later than sixty (60) days after the filing of a written
      request for review of the denial, unless a hearing is held or other
      special circumstances require additional time, in which case the
      Committee's decision must be rendered within 120 days after such date.
      Such decision must be written in a manner calculated to be understood by
      the Claimant, and it must contain:

      (a)  specific reasons for the decision;

      (b)  specific reference(s) to the pertinent Plan provisions upon which the
           decision was based; and

      (c)  such other matters as the Committee deems relevant.

                                  Article 18
                                     Trust

18.1  Establishment of the Trust. The Company shall establish the Trust. The
      --------------------------
      Employer shall at least annually transfer over to the Trust such assets as
      the Committee determines, in its sole discretion, are necessary to provide
      for the Employer's future liabilities created with respect to the Deferral
      Amounts and interest credits for that year.

18.2  Interrelationship of the Plan and the Trust. The provisions of the Plan
      -------------------------------------------
      and the Plan Agreement shall govern the rights of a Participant to receive
      distributions pursuant to the Plan. The provisions of the Trust shall
      govern the rights of the Employer, Participant and the creditors of the
      Employer to the assets transferred to the Trust. The Employer shall at all
      times remain liable to carry out its obligations under the Plan. The
      Employer's obligations under the Plan may be satisfied with Trust assets
      distributed pursuant to the terms of the Trust.

                                     -17-

 
                                  Article 19
                                 Miscellaneous

19.1  Notice.  Any notice given under the Plan shall be in writing and shall be
      ------
      mailed to:
                         JACOBS ENGINEERING GROUP INC.
                               Employee Benefits
                             251 South Lake Avenue
                          Pasadena, California  91101

19.2  Successors. The Plan shall be binding upon the Employer and its respective
      ----------
      successors or assigns, and upon a Participant, the Participant's
      Beneficiaries and the Participant's permitted assigns, heirs, executors
      and administrators.

19.3  Spouse's Interest. The interest in the benefits hereunder of a spouse of a
      -----------------
      Participant who has predeceased the Participant shall automatically pass
      to the Participant and shall not be transferable by such spouse in any
      manner including but not limited to such spouse's will, nor shall such
      interest pass under the laws of intestate succession.

19.4  Governing Law. The Plan and Plan Agreement shall be governed by and
      -------------
      construed under the laws of the State of California, as in effect at the
      time of their adoptions and executions, respectively.

19.5  Pronouns.  Masculine pronouns wherever used shall include feminine
      --------
      pronouns and the singular shall include the plural.

19.6  Headings. The headings of the articles, sections and paragraphs of this
      --------
      Plan are for convenience only and shall not control or affect the meaning
      or construction of any of its provisions.

19.7  Validity. In the event any provision of this Plan shall be illegal or
      --------
      invalid for any reason, the illegality or invalidity of that provision
      shall not affect the remaining parts hereof, but this Plan shall be
      construed and enforced as if such illegal and invalid provision had never
      been inserted herein.

     IN WITNESS WHEREOF JACOBS ENGINEERING GROUP INC. has signed this Plan 
document this 31st day of May, 1991.
              
                         "Company"

                         JACOBS ENGINEERING GROUP INC.
 
                         By:    /s/ John W. Prosser Jr. 
                                ------------------------------------------------

                         Title: Senior Vice President Finance and Administration
                                ------------------------------------------------
                                            (Officer of the Company)

                                     -18-