FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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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(Print or Type Responses)

1. Name and Address of Reporting Person *   Veatch Jeffrey E. 2. Date of Event Requiring Statement (Month/Day/Year) 05/15/2012 3. Issuer Name and Ticker or Trading Symbol ON ASSIGNMENT INC [ASGN] (Last) (First) (Middle) 211 N. UNION STREET, SUITE 220 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) __X__ Other (specify below) Non-Exec Observer of OAI Board 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) ALEXANDRIA, VA 22314 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 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 (1) 3,730,230 (2) D Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Veatch Jeffrey E. 211 N. UNION STREET, SUITE 220 ALEXANDRIA, VA 22314	Â	Â	Â	Non-Exec Observer of OAI Board

Signatures

By: Power of Attorney, James L. Brill, CFO For: Jeffrey E. Veatch		05/17/2012
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Par Value $.01 per share
(2)	Of the aggregate number of shares reported, 291,874 shares are held in escrow in connection with the transactions contemplated by the Agreement of Merger, dated as of March 20, 2012, by and among On Assignment, Inc., a Delaware corporation, OA Acquisition Corp., a Virginia corporation and a wholly-owned subsidiary of On Assignment, Inc., Apex Systems, Inc., a Virginia corporation, and Jeffrey E. Veatch as representative of the shareholders of Apex Systems, Inc.

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