UNITED STATES SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 4
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
( ) Check this box if no longer subject to Section 16.
Form 4 or Form 5 obligations may continue. See Instructions 1(b).
1. Name and Address of Reporting Person
   McCabe, Thomas E.
   1900 Gallows Road
   Vienna, VA  22182
   U.S.
2. Issuer Name and Ticker or Trading Symbol
   GRC International, Inc.
   GRH
3. IRS or Social Security Number of Reporting Person (Voluntary)

4. Statement for Month/Year
   12/31/99
5. If Amendment, Date of Original (Month/Year)

6. Relationship of Reporting Person(s) to Issuer (Check all applicable)
   ( ) Director ( ) 10% Owner (X) Officer (give title below) ( ) Other
   (specify below)
   Senior Vice President
7. Individual or Joint/Group Filing (Check Applicable Line)
   (X) Form filed by One Reporting Person
   ( ) Form filed by More than One Reporting Person
<TABLE>
<CAPTION>
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 Table I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned                                                 |
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1. Title of Security       |2.    |3.    |4.Securities Acquired (A)         |5.Amount of        |6.Dir |7.Nature of Indirect       |
                           | Transaction |  or Disposed of (D)              |  Securities       |ect   |  Beneficial Ownership     |
                           |      |      |                                  |  Beneficially     |(D)or |                           |
                           |      |    | |                  | A/|           |  Owned at         |Indir |                           |
                           | Date |Code|V|    Amount        | D |    Price  |  End of Month     |ect(I)|                           |
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<S>                        <C>    <C>  <C><C>               <C> <C>         <C>                 <C>    <C>
Common Stock, $.10 par valu|12/14/|M   | |27                |(A)|$7.24      |                   |      |                           |
e                          |99    |    | |                  |(1)|           |                   |      |                           |
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Common Stock, $.10 par valu|12/14/|F   | |22                |(D)|$11.031    |                   |      |                           |
e                          |99    |    | |                  |(1)|           |                   |      |                           |
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Common Stock, $.10 par valu|12/14/|M   | |69                |(A)|$8.57      |                   |      |                           |
e                          |99    |    | |                  |(1)|           |                   |      |                           |
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Common Stock, $.10 par valu|12/14/|F   | |61                |(D)|$11.031    |                   |      |                           |
e                          |99    |    | |                  |(1)|           |                   |      |                           |
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Common Stock, $.10 par valu|12/14/|M   | |393               |(A)|$9.43      |                   |      |                           |
e                          |99    |    | |                  |(1)|           |                   |      |                           |
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Common Stock, $.10 par valu|12/14/|F   | |363               |(D)|$11.031    |                   |      |                           |
e                          |99    |    | |                  |(1)|           |                   |      |                           |
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Common Stock, $.10 par valu|12/14/|M   | |127               |(A)|$5.67      |                   |      |                           |
e                          |99    |    | |                  |(1)|           |                   |      |                           |
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Common Stock, $.10 par valu|12/14/|F   | |94                |(D)|$11.031    |                   |      |                           |
e                          |99    |    | |                  |(1)|           |                   |      |                           |
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Common Stock, $.10 par valu|12/14/|M   | |39                |(A)|$5.07      |                   |      |                           |
e                          |99    |    | |                  |(1)|           |                   |      |                           |
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Common Stock, $.10 par valu|12/14/|F   | |28                |(D)|$11.031    |2,664.8809(2)      |(D)   |                           |
e                          |99    |    | |                  |(1)|           |                   |      |                           |
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Common Stock, $.10 par valu|      |    | |                  |   |           |18,469.426(3)      |(I)   |                           |
e                          |      |    | |                  |   |           |                   |      |                           |
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<CAPTION>
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 Table II -- Derivative Securitites Acquired, Disposed of, or Beneficially Owned                                                   |
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1.Title of Derivative |2.Con-  |3.   |4.    |5.Number of De |6.Date Exer|7.Title and Amount  |8.Price|9.Number    |10.|11.Nature of|
  Security            |version |Transaction | rivative Secu |cisable and|  of Underlying     |of Deri|of Deriva   |Dir|Indirect    |
                      |or Exer |     |      | rities Acqui  |Expiration |  Securities        |vative |tive        |ect|Beneficial  |
                      |cise    |     |      | red(A) or Dis |Date(Month/|                    |Secu   |Securities  |(D)|Ownership   |
                      |Price of|     |      | posed of(D)   |Day/Year)  |                    |rity   |Benefi      |or |            |
                      |Deriva- |     |      |               |Date |Expir|                    |       |ficially    |Ind|            |
                      |tive    |     |      |           | A/|Exer-|ation|   Title and Number |       |Owned at    |ire|            |
                      |Secu-   |     |    | |           | D |cisa-|Date |   of Shares        |       |End of      |ct |            |
                      |rity    |Date |Code|V|  Amount   |   |ble  |     |                    |       |Month       |(I)|            |
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<S>                   <C>      <C>   <C>  <C><C>        <C> <C>   <C>   <C>          <C>     <C>     <C>          <C> <C>
Employee Stock Option |$15.44  |     |    | |           |   |(4)  |11/4/|Common Stock|10,000 |       |10,000      |(D)|            |
(right to buy)        |        |     |    | |           |   |     |04   |            |       |       |            |   |            |
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Employee Stock Option |$23.19  |     |    | |           |   |(4)  |9/21/|Common Stock|10,000 |       |10,000      |(D)|            |
(right to buy)        |        |     |    | |           |   |     |05   |            |       |       |            |   |            |
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Employee Stock Option |$34.25  |     |    | |           |   |(4)  |3/28/|Common Stock|5,000  |       |5,000       |(D)|            |
(right to buy)        |        |     |    | |           |   |     |06   |            |       |       |            |   |            |
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Employee Stock Option |$18.31  |     |    | |           |   |(4)  |9/26/|Common Stock|25,000 |       |25,000      |(D)|            |
(right to buy)        |        |     |    | |           |   |     |06   |            |       |       |            |   |            |
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Employee Stock Option |$5.50   |     |    | |           |   |(4)  |7/24/|Common Stock|12,500 |       |12,500      |(D)|            |
(right to buy)        |        |     |    | |           |   |     |07   |            |       |       |            |   |            |
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Stock Option (right to|$4.844  |     |    | |           |   |(4)  |9/17/|Common Stock|20,000 |       |20,000      |(D)|            |
 buy)                 |        |     |    | |           |   |     |08   |            |       |       |            |   |            |
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Employee Stock Option |$9.156  |A    |    | |30,000     |A  |(5)  |9/23/|Common Stock|30,000 |       |30,000      |(D)|            |
(right to buy)        |        |     |    | |           |   |     |09   |            |       |       |            |   |            |
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Cash Comp Repl Option |(6)     |M    |    | |655        |D  |(7)  |(7)  |Common Stock|655    |       |247         |(D)|            |
(right to buy)        |        |     |    | |           |   |     |     |            |       |       |            |   |            |
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                      |        |     |    | |           |   |     |     |            |       |       |            |   |            |
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</TABLE>
Explanation of Responses:
(1) On December 14, 1999,  Mr. McCabe exercised options to purchase 655 shares
of stock under the Cash
Compensation Replacement Plan.  Mr. McCabe paid the exercise price by
trading-in a total of 491 shares and paid
the tax withholding by the Company's retention of 77 shares, leaving him a
total of 87 new shares; (2) Includes
 .8809 shares held in the Company's Employee Stock Purchase Plan; (3) Units of
the GRC International Stock Fund
held in the Company's Deferred Income Plan; (4) 50% exercisable 2 years after
grant; 75% exercisable 3 years
after grant; and 100% exercisable 4 years after grant; (5) 1/3 exercisable 1
year after grant; 2/3 exercisable 2
years after grant; and 100% exercisable 3 years after grant; (6) Exercise
prices ranging frm $3.267 to $9.429; (7)
Options granted in lieu of salary or bonus otherwise payable.  80% exercisable
upon grant; 90% exercisable 2
years after grant; 95% exercisable 3 years after grant; and 100% exercisable 4
years after grant, no fixed
expiration, expires 3 years after employee's
termination.