ASGN Inc — Director's Dealing 2012

Jan 5, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ON ASSIGNMENT INC (ASGN)
CIK: 0000890564
Period of Report: 2012-01-02

Reporting Person: Brouse Mark (President, Vista Staffing)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-01-02	Common Stock	D	2368	$11.18	Disposed	153525	Direct
2012-01-03	Common Stock	D	1014	$11.02	Disposed	152511	Direct
2012-01-04	Common Stock	D	1773	$11.05	Disposed	150738	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	8500	Indirect

Footnotes

F1: Executive officer elected to satisfy tax withholding obligations upon vesting by having On Assignment, Inc. withhold a number of vested shares equal to that of the employee's tax liability.