ASGN Inc — Director's Dealing 2010

May 7, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ON ASSIGNMENT INC (ASGN)
CIK: 0000890564
Period of Report: 2010-05-07

Reporting Person: McGowan Michael (CEO - Oxford Global Resources)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-07	Common Stock	P	121	$5.94	Acquired	263625	Direct
2010-05-07	Common Stock	P	200	$5.955	Acquired	263825	Direct
2010-05-07	Common Stock	P	200	$5.96	Acquired	264025	Direct
2010-05-07	Common Stock	P	800	$5.97	Acquired	264825	Direct
2010-05-07	Common Stock	P	1200	$5.98	Acquired	266025	Direct
2010-05-07	Common Stock	P	400	$5.985	Acquired	266425	Direct
2010-05-07	Common Stock	P	1400	$5.99	Acquired	267825	Direct
2010-05-07	Common Stock	P	200	$5.995	Acquired	268025	Direct
2010-05-07	Common Stock	P	15479	$6	Acquired	283504	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	5000	Indirect