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|   | (a) | Article      1 of the Loan Agreement is hereby amended by deleting the following      definitions of “2008 Reserve” and “EBITDA” contained    therein: |
|--------|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| Trailing Four Quarter Period Ended  | Maximum 2008 Reserve  Amount |
|-----------------------------------------------|------------------------------|
| September      30, 2008                  | $14,819,000.00               |
| December      31, 2008                   | $14,819,000.00               |
| March      31, 2009                      | $6,000,000.00                |
| June      30, 2009                       | $6,000,000.00                |

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|   | (b) | Section      6.27(b) of the Loan Agreement is hereby amended by deleting the following      text appearing therein in itsentirety: |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------|

|   | (c) | Section      8.10 of the Loan Agreement is hereby amended by deleting the following      text appearing therein in itsentirety: |
|--------|-----|---------------------------------------------------------------------------------------------------------------------------------|

|   | (d) | Exhibit      6-17 to the Loan Agreement is hereby deleted and replaced with the text      attached hereto as Exhibit      A. |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------|

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|   | (a) | This      First Amendment shall have been duly executed and delivered by the      Borrowers, the Administrative Agent and the Lenders and the Administrative      Agent shall have received a fully executed copy  hereof. |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (b) | The      Administrative Agent shall have received such other documents,      instruments, and certificates relating to the transactions contemplated by      this First Amendment as may be reasonably requested by the Administrative      Agent. |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (c) | The      Administrative Agent shall have received the Amendment Fee from the      Borrowers. |
|--------|-----|----------------------------------------------------------------------------------------------|

|   | (d) | No      default or Event of Default shall be continuing immediately after giving      effect to the execution of this FirstAmendment. |
|--------|-----|---------------------------------------------------------------------------------------------------------------------------------------|

|   | (a) | This      First Amendment may be executed in several counterparts and by each party      on a separate counterpart, each of which when so executed and delivered      shall be an original, and all of which together shall constitute one      instrument. |
|--------|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (b) | This      First Amendment expresses the entire understanding of the parties with      respect to the transactions contemplated hereby.  No prior      negotiations or discussions shall limit, modify, or otherwise affect the      provisions hereof. |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (c) | Any      determination that any provision of this First Amendment or any      application hereof is invalid, illegal or unenforceable in any respect and      in any instance shall not affect the validity, legality, or enforceability      of such provision in any other instance, or the validity, legality or      enforceability of any other provisions of this First      Amendment. |
|--------|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (d) | The      Borrowers each warrant and represent that each such Borrower has consulted      with independent legal counsel of such Borrower’s selection in connection      with this First Amendment and is not relying on any representations or      warranties of the Agents or the Lenders, or their respective counsels, in      entering into this First Amendment. |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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|   | (e) | Except      as expressly provided herein, the amendments set forth herein shall be      effective as of the date of this First  Amendment. |
|--------|-----|--------------------------------------------------------------------------------------------------------------------------------------------|

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|   | DYNAMICS      RESEARCH CORPORATON               |
|--------|-------------------------------------------------|
|   | (“Lead      Borrower and Borrower”) |
|   |                                            |   |   |
|   | By:                                             | /s/      David Keleher |   |
|   | Name:                                           | David      Keleher |   |
|   | Title:                                          | Senior      Vice President - Finance,  |
|   |                                            | CFO      and Treasurer |   |
|   |                                            |   |   |
|   | DRC      INTERNATIONAL CORPORATON               |
|   | (“Borrower”)                        |
|   |                                            |   |   |
|   | By:                                             | /s/      David Keleher |   |
|   | Name:                                           | David      Keleher |   |
|   | Title:                                          | Vice      President - Finance CFO  |
|   |                                            |   |   |
|   | H.J.      FORD ASSOCIATES, INC.                 |
|   | (“Borrower”)                        |
|   |                                            |   |   |
|   | By:                                             | /s/      David Keleher |   |
|   | Name:                                           | David      Keleher |   |
|   | Title:                                          | Treasurer,      CFO and Assistant  |
|   |                                            | Secretary |   |
|   |                                            |   |   |
|   | KADIX      SYSTEMS, LLC                         |
|   | (“Borrower”)                        |
|   |                                            |   |   |
|   | By:                                             | /s/      David Keleher |   |
|   | Name:                                           | David      Keleher |   |
|   | Title:                                          | Manager |   |

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|   | BROWN      BROTHERS HARRIMAN & CO.               |
|--------|------------------------------------------------------|
|   | (“Administrative Agent and      Lender”) |
|   |                                                 |   |   |
|   | By:                                                  | /s/      Daniel G. Head, Jr. |   |
|   | Name:                                                | Daniel      G. Head, Jr. |   |
|   | Title:                                               | S.V.P. |   |
|   |                                                 |   |   |
|   |                                                 |   |   |
|   | TD      BANK, N.A.                                   |
|   | (“Documentation Agent and      Lender”)  |
|   |                                                 |   |   |
|   | By:                                                  | /s/      Jeffrey R. Westling |   |
|   | Name:                                                | Jeffrey      R. Westling |   |
|   | Title:                                               | SVP |   |
|   |                                                 |   |   |
|   |                                                 |   |   |
|   | BANK      OF AMERICA, N.A.                           |
|   | (“Syndication Agent and      Lender”)    |
|   |                                                 |   |   |
|   | By:                                                  | /s/      Thomas F. Brennan |   |
|   | Name:                                                | Thomas      F. Brennan |   |
|   | Title:                                               | SVP |   |

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