Mail Stop 3561 					June 27, 2005 Mr. Ronald W. Rudolph Executive Vice President and Chief Financial Officer On Assignment, Inc. 26651 West Agoura Road Calabasas, CA 91302 	RE:	On Assignment, Inc. Form 10-K for the fiscal year ended December 31, 2004 	Filed March 16, 2005 	File No. 000-20540 Dear Mr. Rudolph: 	We have completed our review of your Form 10-K and related filings and do not, at this time, have any further comments. 								Sincerely, 								Larry Spirgel 								Assistant Director ?? ?? ?? ?? Mr. Robin N. Dickson Harmonic Inc. Page 1