FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * BOWSHER CHARLES A   2. Issuer Name and Ticker or Trading Symbol SI INTERNATIONAL INC [SINT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O SI INTERNATIONAL, INC., 12012 SUNSET HILLS ROAD, SUITE800 3. Date of Earliest Transaction (Month/Day/Year) 12/29/2008 (Street) RESTON, VA 20190 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 12/29/2008   D   1,875 (1) D $ 32 0 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Employee Stock Option (Right to Buy)

$ 8.22

12/29/2008

D

10,000

(2)

04/25/2013

Common Stock

10,000

$ 23.78

0

D

Employee Stock Option (Right to Buy)

$ 16.55

12/29/2008

D

2,500

(3)

01/16/2014

Common Stock

2,500

$ 15.45

0

D

Employee Stock Option (Right to Buy)

$ 25.8

12/29/2008

D

2,500

(4)

02/11/2015

Common Stock

2,500

$ 6.2

0

D

Employee Stock Option (Right to Buy)

$ 28.61

12/29/2008

D

1,875

(5)

08/04/2016

Common Stock

1,875

$ 3.39

0

D

Employee Stock Option (Right to Buy)

$ 28.22

12/29/2008

D

1,875

(6)

03/07/2017

Common Stock

1,875

$ 3.78

0

D

Employee Stock Option (Right to Buy)

$ 23.55

12/29/2008

D

1,875

(7)

02/22/2018

Common Stock

1,875

$ 8.45

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
BOWSHER CHARLES A C/O SI INTERNATIONAL, INC. 12012 SUNSET HILLS ROAD, SUITE800 RESTON, VA 20190	X

Signatures

James E. Daniel by Power of Attorney		12/31/2008
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Disposed of in connection with the merger (the "Merger") of Matador Acquisition Corporation, a Delaware corporation ("Merger Sub"), with and into the issuer, as contemplated by that certain Agreement and Plan of Merger by and among the issuer, Serco Group plc, a public limited company organized under the laws of England and Wales, Serco Inc., a New Jersey corporation and Merger Sub, dated as of August 26, 2008. In connection with the Merger, the shares of common stock listed were exchanged for the right to receive $32.00 per share in cash.
(2)	This option, which fully vested on December 31, 2005, was canceled in the Merger in exchange for a cash payment of $237,800.00, representing an amount equal to the number of shares of common stock underlying the option multiplied by the difference between the per share exercise price and the per share merger consideration of $32.00.
(3)	This option, which fully vested on December 31, 2005, was canceled in the Merger in exchange for a cash payment of $38,625.00, representing an amount equal to the number of shares of common stock underlying the option multiplied by the difference between the per share exercise price and the per share merger consideration of $32.00.
(4)	This option, which fully vested on December 31, 2005, was canceled in the Merger in exchange for a cash payment of $15,500.00, representing an amount equal to the number of shares of common stock underlying the option multiplied by the difference between the per share exercise price and the per share merger consideration of $32.00.
(5)	This option, which provided for vesting in three equal annual installments beginning on August 4, 2007, was canceled in the Merger in exchange for a cash payment of $6,356.25, representing an amount equal to the number of shares of common stock underlying the option multiplied by the difference between the per share exercise price and the per share merger consideration of $32.00.
(6)	This option, which provided for vesting in three equal annual installments beginning on March 7, 2008, was canceled in the Merger in exchange for a cash payment of $7,087.50, representing an amount equal to the number of shares of common stock underlying the option multiplied by the difference between the per share exercise price and the per share merger consideration of $32.00.
(7)	This option, which provided for vesting in three equal annual installments beginning on February 22, 2009, was canceled in the Merger in exchange for a cash payment of $15,843.75, representing an amount equal to the number of shares of common stock underlying the option multiplied by the difference between the per share exercise price and the per share merger consideration of $32.00.

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