URS CORPORATION 1991 STOCK INCENTIVE PLAN

                       NONSTATUTORY STOCK OPTION AGREEMENT


         This  NONSTATUTORY  STOCK OPTION AGREEMENT (the  "Agreement"),  entered
into as of March 23, 1999, between URS CORPORATION,  a Delaware corporation (the
"Company"), and MARTIN M. KOFFEL (the "Optionee"),

                                   WITNESSETH

         WHEREAS,  the  Company's  Board of Directors  has  established  the URS
Corporation 1991 Stock Incentive Plan in order to provide selected employees and
consultants of the Company and its  Subsidiaries  with an opportunity to acquire
Common Shares of the Company; and

         WHEREAS,  the  Committee  has  determined  that it would be in the best
interests of the Company and its  stockholders to grant the  Nonstatutory  Stock
Option  described in this  Agreement to the Optionee as an  inducement  to enter
into  or  remain  in  the  service  of  the  Company  and  as an  incentive  for
extraordinary efforts during such service.

         NOW, THEREFORE, it is agreed as follows:

I.       GRANT OF OPTION.

A. Option.  On the terms and conditions  stated below, the Company hereby grants
to the Optionee the option to purchase Three Hundred  Thousand  (300,000) Common
Shares for the sum of fifteen dollars and seventy-five cents ($15.75) per Common
Share,  which is agreed to be 100% of the fair market value  thereof (as defined
in the  Plan) as of the Date of Grant.  This  option  is not  intended  to be an
Incentive Stock Option.

B. Stock Plan. This option is granted  pursuant to the Plan, a copy of which the
Optionee  acknowledges having received,  read and understood.  The provisions of
the Plan are incorporated into this Agreement by this reference.

II.      NO TRANSFER OR ASSIGNMENT OF OPTION.

         Except as  otherwise  provided in this  Agreement,  this option and the
rights and  privileges  conferred  hereby  shall not be  transferred,  assigned,
pledged or  hypothecated  in any way (whether by operation of law or  otherwise)
and shall not be subject to sale under execution, attachment or similar process.
Upon any attempt to transfer,  assign, pledge,  hypothecate or otherwise dispose
of this option, or of any right or privilege  conferred hereby,  contrary to the
provisions hereof, or upon any attempted sale under any execution, attachment or
similar process upon the rights and privileges conferred hereby, this option and
the rights and privileges  conferred  hereby shall  immediately  become null and
void.

                                       1.


III.     RIGHT TO EXERCISE.

         A. Vesting.  Subject to the conditions stated herein, this option shall
become exercisable in installments as follows:

                  Date                             Percentage Exercisable

              March 23, 2000                               20%

              March 23, 2001                               40%

              March 23, 2002                               60%

              March 23, 2003                               80%

              March 23, 2004                              100%

In addition,  this option shall become  exercisable in its entirety in the event
that (i) a Change in Control  occurs  with  respect  to the  Company or (ii) the
Optionee's employment as a Key Employee terminates by reason of his death, Total
and Permanent Disability or retirement at or after age 65.

         B. Minimum Number. This option shall not be exercised for less than 100
Common  Shares at any one time,  except that it may be exercised  for all of the
Common Shares then remaining subject to option, if less than 100 Common Shares.

IV.      EXERCISE PROCEDURES.

         A. Notice of Exercise.  The Optionee or the  Optionee's  representative
may  exercise  this  option by giving  written  notice to the  Secretary  of the
Company  pursuant to Section XI.D hereof.  The notice shall specify the election
to exercise  this  option and the number of Common  Shares for which it is being
exercised.  The notice shall be signed by the person or persons  exercising this
option.  In the event that this option is being exercised by the  representative
of the Optionee,  the notice shall be accompanied by proof  (satisfactory to the
Company) of the representative's  right to exercise this option. The Optionee or
the Optionee's  representative shall deliver to the Secretary of the Company, at
the time of giving the notice,  payment in a form  described in Section V hereof
for the full amount of the Purchase Price.

         B. Issuance of Shares. After receiving a proper notice of exercise, the
Company shall cause to be issued a certificate  or  certificates  for the Common
Shares as to which this option has been exercised, registered in the name of the
person  exercising this option (or in the names of such person and his spouse as
community property or as joint tenants with right of survivorship).  The Company
shall cause such  certificate  or  certificates  to be  delivered to or upon the
order of the person exercising this option.

                                       2.


V.       PAYMENT FOR STOCK.

         The entire  Purchase  Price shall be paid in lawful money of the United
States of America or in one of the forms  described in Sections 6.2, 6.3 and 6.4
of the Plan.

VI.      TERM AND EXPIRATION.

         A. Basic  Term.  This option  shall in any event  expire on the date 10
years after the Date of Grant.

         B. Termination of Service (Except by Death). If the Optionee's  service
as a Key Employee  terminates for any reason other than death,  then this option
shall expire on the earliest of the following occasions:

                  1. The expiration date  determined  pursuant to Subsection (a)
above;

                  2.  The  date  three  months  after  the  termination  of  the
Optionee's  service as a Key Employee for any reason other than  retirement from
the  Company  on or after  the date the  Optionee  attains  age 65 or Total  and
Permanent Disability;

                  3. The date 12 months after the  termination of the Optionee's
service as a Key Employee because of his Total and Permanent Disability; or

                  4. The date three years after the Optionee's  retirement  from
the Company if such retirement occurs on or after the date on which the Optionee
attains age 65.

The  Optionee  may  exercise  all or part of this  option at any time before its
expiration under the preceding sentence, but only to the extent that this option
had  become  exercisable  before the  Optionee's  service  terminated  or became
exercisable  as a result of the  termination.  The balance of this option  shall
lapse when the  Optionee's  service as a Key Employee  terminates.  In the event
that the  Optionee  dies  after  the  termination  of  service  but  before  the
expiration of this option, all or part of this option may be exercised (prior to
expiration) by the executors or  administrators  of the Optionee's  estate or by
any person who has acquired  this option  directly from the Optionee by bequest,
beneficiary designation or inheritance,  but only to the extent that this option
had become exercisable before the Optionee's service terminated.

         C. Death of Optionee. If the Optionee dies as a Key Employee, then this
option shall expire on the earlier of the following dates:

                  1. The expiration date determined  pursuant to Subsection VI.A
above; or

                  2. The date 12 months after the Optionee's death.

All or part of this option may be  exercised  at any time before its  expiration
under  the  preceding  sentence  by  the  executors  or  administrators  of  the
Optionee's  estate or by any person who has acquired  this option  directly from
the Optionee by bequest, beneficiary designation or inheritance, but only to the
extent that this option had become  exercisable  before the Optionee's

                                       3.


death or became  exercisable as a result of the Optionee's death. The balance of
this option shall lapse when the Optionee dies.

         D. Leaves of Absence. For purposes of this Section VI, the Key Employee
relationship  shall be deemed to continue during any period when the Optionee is
on  military  leave,  sick  leave or other  bona fide  leave of  absence  (to be
determined in the sole discretion of the Committee).

VII.     LEGALITY OF INITIAL ISSUANCE.

         No Common  Shares  shall be issued  upon the  exercise  of this  option
unless and until the Company has determined that:

                  a. It and the  Optionee  have taken any  actions  required  to
register the Common Shares under the  Securities  Act or to perfect an exemption
from the registration requirements thereof;

                  b. Any applicable listing requirement of any stock exchange on
which Common Shares are listed has been satisfied; and

                  c. Any other applicable  provision of state or federal law has
been satisfied.

VIII.    NO REGISTRATION RIGHTS.

         The Company may, but shall not be obligated to, register or qualify the
sale of Common Shares under the Securities Act or any other  applicable law. The
Company shall not be obligated to take any affirmative  action in order to cause
the sale of Common Shares under this Agreement to comply with any law.

IX.      RESTRICTIONS ON TRANSFER OF SHARES.

         A. Restrictions.  Regardless of whether the offering and sale of Common
Shares under the Plan have been registered under the Securities Act or have been
registered or qualified under the securities laws of any state,  the Company may
impose  restrictions  upon the sale,  pledge or other  transfer  of such  Common
Shares  (including the placement of appropriate  legends on stock  certificates)
if, in the  judgment of the  Company  and its  counsel,  such  restrictions  are
necessary or desirable in order to achieve  compliance  with the Securities Act,
the securities laws of any state or any other law or with  restrictions  imposed
by the Company's underwriters.

         B. Investment Intent at Exercise.  In the event that the sale of Common
Shares  under  the  Plan  is not  registered  under  the  Securities  Act but an
exemption is available  which  requires an  investment  representation  or other
representation,  the Optionee shall  represent and agree at the time of exercise
that the Common  Shares being  acquired  upon  exercising  this option are being
acquired  for  investment,  and  not  with a view to the  sale  or  distribution
thereof,  and shall make such other  representations  as are deemed necessary or
appropriate by the Company and its counsel.

                                       4.


         C. Legend. In the event that certificates  evidencing Common Shares are
acquired under this Agreement in an  unregistered  transaction,  they shall bear
the  following  restrictive  legend (and such other  restrictive  legends as are
required or deemed advisable under the provisions of any applicable law):

         "THE  SHARES  REPRESENTED  HEREBY  HAVE NOT BEEN  REGISTERED  UNDER THE
         SECURITIES ACT OF 1933, AS AMENDED,  AND MAY NOT BE SOLD,  PLEDGED,  OR
         OTHERWISE  TRANSFERRED WITHOUT AN EFFECTIVE  REGISTRATION THEREOF UNDER
         SUCH ACT OR AN OPINION OF COUNSEL,  SATISFACTORY TO THE COMPANY AND ITS
         COUNSEL, THAT SUCH REGISTRATION IS NOT REQUIRED."

         D.  Removal  of  Legends.  If, in the  opinion of the  Company  and its
counsel,  any legend placed on a stock  certificate  representing  Common Shares
sold under this Agreement is no longer required,  the holder of such certificate
shall be entitled to exchange such  certificate  for a certificate  representing
the same number of Common Shares but lacking such legend.

         E. Administration.  Any determination by the Company and its counsel in
connection  with  any of the  matters  set  forth  in this  Section  IX shall be
conclusive and binding on the Optionee and all other persons.

X.       SHARES AND ADJUSTMENTS.

         A. General.  In the event of a subdivision  of the  outstanding  Common
Shares, a declaration of a dividend payable in Common Shares, a declaration of a
dividend  payable  in a form other than  Common  Shares in an amount  that has a
material effect on the price of Common Shares, a combination or consolidation of
the outstanding Common Shares (by  reclassification  or otherwise) into a lesser
number of Common Shares, a recapitalization,  a spinoff or a similar occurrence,
the  Committee  shall  make  appropriate  adjustments  in one or both of (1) the
number of Common Shares covered by this option or (2) the Exercise Price.

         B.  Reorganizations.  In the  event  that the  Company  is a party to a
merger or other reorganization, this option shall be subject to the agreement of
merger or reorganization.  Such agreement may provide,  without limitation,  for
(1) the  assumption of this option by the surviving  corporation  or its parent,
(2) its continuation by the Company, if the Company is a surviving  corporation,
(3) the acceleration of its  exercisability  or (4) payment of a cash settlement
equal to the difference between the amount to be paid for one Common Share under
such agreement and the Exercise Price.

         C.  Reservation  of Rights.  Except as provided in this  Section X, the
Optionee shall have no rights by reason of (1) any subdivision or  consolidation
of shares of stock of any  class,  (2) the  payment of any  dividend  or (3) any
other  increase or  decrease in the number of shares of stock of any class.  Any
issue by the Company of shares of stock of any class, or securities  convertible
into shares of stock of any class, shall not affect, and no adjustment by reason
thereof  shall be made with  respect  to,  the number or  Exercise  Price of the
Common Shares subject to this option.  The grant of this option shall not affect
in  any  way  the  right  or  power  of  the   Company   to  make   adjustments,
reclassifications,  reorganizations  or  changes  of  its  capital  or  business

                                       5.


structure, to merge or consolidate or to dissolve,  liquidate,  sell or transfer
all or any part of its business or assets.

XI.      MISCELLANEOUS PROVISIONS.

         A. Withholding  Taxes. In the event that the Company determines that it
is required to withhold foreign,  federal, state or local tax as a result of the
exercise of this option,  the  Optionee,  as a condition to the exercise of this
option,  shall make  arrangements  satisfactory  to the  Company to enable it to
satisfy all withholding  requirements.  Share  withholding shall be available to
the extent provided in Section 11.2 of the Plan.  Notwithstanding the foregoing,
the Company shall not be authorized to withhold Common Shares at rates in excess
of the minimum  statutory  withholding rates for federal and state tax purposes,
including payroll taxes.

         B. Rights As a  Stockholder.  Neither the Optionee  nor the  Optionee's
representative shall have any rights as a stockholder with respect to any Common
Shares  subject to this option until such Common  Shares have been issued in the
name of the Optionee or the Optionee's representative.

         C. No Employment  Rights.  Nothing in this Agreement shall be construed
as giving the Optionee the right to be retained as a Key  Employee.  The Company
reserves  the right to terminate  the  Optionee's  service at any time,  with or
without cause (subject to any employment  agreement between the Optionee and the
Company).

         D. Notice.  Any notice required by the terms of this Agreement shall be
given in writing and shall be deemed  effective  upon personal  delivery or upon
deposit with the United States Postal  Service,  by registered or certified mail
with postage and fees prepaid and addressed to the party entitled to such notice
at the address shown below such party's signature on this Agreement,  or at such
other address as such party may designate by 10 days' advance  written notice to
the other party to this Agreement.

         E. Entire Agreement.  This Agreement and the Plan constitute the entire
contract between the parties hereto with regard to the subject matter hereof.

         F. Choice of Law. This Agreement shall be governed by, and construed in
accordance  with, the laws of the State of California,  as such laws are applied
to contracts entered into and performed in such State.

XII.     DEFINITIONS.

         "Agreement" shall mean this Nonstatutory Stock Option Agreement.

         "Change in Control"  shall mean the  occurrence of any of the following
events after the Date of Grant:

                  a. A change in control  required  to be  reported  pursuant to
Item 6(e) of Schedule 14A of Regulation 14A under the Exchange Act;

                                       6.


                  b. A change in the  composition  of the Board of  Directors of
the Company (the  "Board"),  as a result of which fewer than  two-thirds  of the
incumbent  directors  are  directors  who either (i) had been  directors  of the
Company 24 months prior to such change or (ii) were  elected,  or nominated  for
election,  to the Board with the affirmative votes of at least a majority of the
directors  who had been  directors of the Company 24 months prior to such change
and who were still in office at the time of the election or nomination; or

                  c. Any  "person"  (as such term is used in sections  13(d) and
14(d) of the Exchange Act) by the acquisition or aggregation of securities is or
becomes the  beneficial  owner,  directly or  indirectly,  of  securities of the
Company  representing  twenty percent (20%) 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 (the "Base Capital Stock"); except that:

                           (i) the  beneficial  ownership  by a person of twenty
percent  (20%) or more,  but less than a majority,  of the Base Capital Stock in
the ordinary course of such person's business and not with the purpose or effect
of changing  or  influencing  the control of the  Company,  and  otherwise  in a
situation  where the  person  is  eligible  to file a  short-form  statement  on
Schedule  13G under  Rule  13d-1  under the  Exchange  Act with  respect to such
beneficial ownership, shall be disregarded;

                           (ii) any change in the relative beneficial  ownership
of the Company's  securities by any person  resulting solely from a reduction in
the  aggregate  number of  outstanding  shares of Base  Capital  Stock,  and any
decrease  thereafter  in  such  person's  ownership  of  securities,   shall  be
disregarded  until such person increases in any manner,  directly or indirectly,
such person's beneficial ownership of any securities of the Company; and

                           (iii) the  beneficial  ownership by Richard C. Blum &
Associates,  Inc. ("RCBA") or any person "affiliated" (within the meaning of the
Exchange  Act) with RCBA  (collectively,  the "RCBA Group") of (w) shares of the
Company's  Series B Preferred Stock (x) additional  shares of Series B Preferred
Stock  issued in  payment of  dividends  on the Series B  Preferred  Stock,  (y)
additional  shares of the Company's  Common Stock issued upon the  conversion of
the Series B Preferred  Stock in  accordance  with its terms,  and (z) shares of
other  securities  of the Company  issued in exchange for the Series B Preferred
Stock in accordance with its terms (collectively, the "RCBA Preferred Investment
Shares"),  shall be  disregarded  unless  and until the RCBA Group  becomes  the
beneficial  owner,  directly  or  indirectly,   of  securities  of  the  Company
(including the RCBA Preferred  Investment  Shares)  representing more than fifty
percent (50%) of the Base Capital Stock;  provided that the beneficial ownership
of all or a portion of the RCBA  Preferred  Investment  Shares by a third person
who acquires such shares  through  purchase,  assignment or other  transfer from
RCBA or another  member of the RCBA Group,  and the  beneficial  ownership  by a
third person not affiliated with the RCBA Group as of the date of this Agreement
who acquires control of RCBA or the RCBA Group, shall not be disregarded.

         "Code" shall mean the Internal Revenue Code of 1986, as amended.

                                       7.


         "Committee"  shall  mean  the  committee  of  the  Company's  Board  of
Directors described in Article 2 of the Plan.

         "Common Share" shall mean one share of the common stock of the Company,
as adjusted in accordance with Section X (if applicable).

         "Date of Grant" shall mean the date on which the Committee  resolved to
grant this option,  which is also the date as of which this Agreement is entered
into.

         "Exchange  Act"  shall mean the  Securities  Exchange  Act of 1934,  as
amended.

         "Exercise  Price"  shall mean the amount for which one Common Share may
be purchased upon exercise of this option, as specified in Section I.A.

         "Incentive Stock Option" shall mean an employee  incentive stock option
described in section 422(b) of the Code.

         "Key Employee" shall mean (i) a key common-law  employee of the Company
or of a Subsidiary,  as  determined  by the  Committee or (ii) a consultant  who
provides  services to the Company or a Subsidiary as an  independent  contractor
and who is not a member of the Company's Board of Directors.

         "Plan" shall mean the URS Corporation  1991 Stock Incentive Plan, as in
effect on the Date of Grant.

         "Purchase Price" shall mean the Exercise Price multiplied by the number
of Common Shares with respect to which this option is being exercised.

         "Securities Act" shall mean the Securities Act of 1933, as amended.

         "Subsidiary"  shall mean any corporation,  if the Company and/or one or
more other Subsidiaries own not less than 50% of the total combined voting power
of all classes of outstanding stock of such corporation.

         "Total and Permanent Disability" shall mean that the Optionee is unable
to engage  in any  substantial  gainful  activity  by  reason  of any  medically
determinable  physical or mental  impairment  which can be expected to result in
death or which has lasted,  or can be expected to last, for a continuous  period
of not less than 12 months.

                                       8.


         IN WITNESS  WHEREOF,  the  Company  has  caused  this  Agreement  to be
executed on its behalf by its officer  duly  authorized  to act on behalf of the
Committee, and the Optionee has personally executed this Agreement.

OPTIONEE                                      URS CORPORATION


/s/ MARTIN M. KOFFEL                          By  /s/ JOSEPH MASTERS
- -----------------------------                 ----------------------------------
Martin M. Koffel                                       Joseph Masters



Optionee's Address:                           Company's Address:

2772 Scott Street                             100 California Street, Suite 500
San Francisco, California 94123               San Francisco, California 94111

                                       9.