1. Name and Address of Reporting Person * CACI, INC.-FEDERAL	2. Date of Event Requiring Statement (MM/DD/YYYY) 7/25/2011	3. Issuer Name and Ticker or Trading Symbol Paradigm Holdings, Inc [PDHO.OB]
(Last)        (First)        (Middle) 1100 N. GLEBE ROAD	4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                            ___ X ___ 10% Owner _____ Officer (give title below)          _____ Other (specify below)
(Street) ARLINGTON, VA 22201        (City)              (State)              (Zip)	5. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) ___ Form filed by One Reporting Person _ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	0   (1)	I	See Explanation of Responses   (2) (3)

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:
(1)	This Form 3 is filed jointly by CACI, Inc. - Federal and CACI International Inc (collectively the "Reporting Persons"). Each of the Reporting Persons may be deemed to have voting power with respect to (and therefore may beneficially own within the meaning of Rule 13d-3 under the Securities Exchange Act of 1934 ("Exchange Act")) in excess of 10% of the Issuer's outstanding shares of common stock ("Paradigm Common Stock"). See footnotes 2 and 3 below.
(2)	In connection with the Agreement and Plan of Merger ("Merger Agreement"), dated as of July 25, 2011, by and among Paradigm Holdings, Inc., a Nevada corporation ("Paradigm"), CACI, Inc.-Federal, a Delaware corporation ("Parent"), a wholly-owned subsidiary of CACI International Inc ("CACI"), and CACI Newco Corporation, a Nevada corporation and wholly-owned subsidiary of Parent, Parent entered into Stockholder Support Agreements with certain of Paradigm's stockholders (the "Stockholders"), each dated as of July 25, 2011, whereby, among other things, the Stockholders agreed to appoint Parent or its designee as such Stockholder's proxy and attorney-in-fact to vote such Stockholder's Paradigm Common Stock, and as applicable certain other securities, in favor of the merger, the Merger Agreement and the transactions contemplated by the Merger Agreement and against any adverse proposal. (Continued in footnote 3)
(3)	By reason of receipt of the proxy, CACI and Parent may be deemed to each have shared voting power with respect to (and therefore beneficially own within the meaning of Rule 13d-3 under the Exchange Act) greater than 10% of the Paradigm Common Stock outstanding as of July 25, 2011. Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that CACI or Parent is, for purposes of Section 13(d) or Section 16 of the Exchange Act or otherwise, the beneficial owner of any shares of Paradigm Common Stock referred to herein, and such beneficial ownership is expressly disclaimed. Neither CACI nor Parent has any pecuniary interest in the Paradigm Common Stock and therefore neither has beneficial ownership of any shares of Paradigm Common Stock within the meaning of Rule 16a-1(a)(2) under the Exchange Act.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
CACI, INC.-FEDERAL 1100 N. GLEBE ROAD ARLINGTON, VA 22201		X
CACI INTERNATIONAL INC /DE/ 1100 N. GLEBE ROAD ARLINGTON, VA 22201		X

Signatures
/s/ Arnold D. Morse, Sr. VP, Chief Legal Officer and Secretary for CACI, INC. - FEDERAL		8/3/2011
** Signature of Reporting Person		Date
/s/ Arnold D. Morse, Sr. VP, Chief Legal Officer and Secretary for CACI International Inc		8/3/2011
** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 5(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).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.