DynCorp

                            2000 Edmund Halley Drive
                           Reston, Virginia 20191-3436

             Voting Instructions for Annual Meeting of Stockholders
                                  July 1, 1998

These  instructions  are solicited by the Trustees of the DynCorp Savings and 
Retirement Plan Trust.

The  undersigned  hereby  directs the  Trustees of the  DynCorp  Savings and
Retirement  Plan Trust, and each of them, to vote all shares of DynCorp  Common
Stock  allocated  to the  undersigned's  account  in such  Trust,  at the Annual
Meeting  of  Stockholders  of  DynCorp  on  Wednesday,  July  1,  1998,  or  any
adjournment  thereof,  upon  the  matters  set  forth  on the  reverse  side and
described in the accompanying  Proxy Statement and upon such other matters which
may properly come before the meeting or any adjournment thereof.

Please  mark  this  card  as  indicated  on the  reverse  side  to  give  voting
instructions  on any item. If you wish to vote in  accordance  with the Board of
Directors'  recommendations,  please sign the reverse  side; no boxes need to be
checked.


                                 (reverse side)

Vote shares allocated to
my account in the DynCorp
Savings and Retirement
Plan Trust as follows:

                     FOR AGAINST WITHHOLD                FOR   AGAINST WITHHOLD
                                 AUTHORITY                             AUTHORITY

1.  Re-election of   |_|  |_|     |_| 2. Ratification of |_|    |_|        |_|
    the following                        Arthur Andersen
    nominees as                          LLP as 
    Class I Directors:                   independent            
                                         public 
      Dan R. Bannister                   accountants
      Paul G. Kaminski                   1998                       
      David L. Reichardt                                              
                                                 
     
Withhold  Authority;  (to withhold
authority to vote for an individual
nominee, write that nominee's name
below.)




                                           Common

                               The shares represented hereby will be voted as
                               directed by this proxy; if no direction is
                               made they will be voted FOR all items. The Board
                               of Directors recommends a vote FOR all nominees
                               and for ratification.


Signature                                                Date
NOTE:  Please sign as name appears hereon.

             To ensure your vote is counted, please detach the above
                 proxy/instruction card and mail to ChaseMellon
                 Shareholders Services, L.L.C. by June 29, 1998

                     Use the enclosed postage free envelope