On Assignment, Inc. (NASDAQ: ASGN), a leading global provider of diversified professional staffing solutions, announced today that it has rebranded its U.S. clinical research division under the name Valesta Clinical Research Solutions.

This change was made to best promote the company's global presence in clinical research and its range of service offerings - from contract and direct hire placements to functional outsourcing for clinical trials. The new name also leverages the strength of the existing Valesta clinical research brand within Western Europe - a company acquired by On Assignment in February 2011.

"By unifying the brand we can effectively communicate our enhanced global services that offer new ways to meet the needs of our customers," said Emmett McGrath, president of On Assignment's Life Sciences and Allied Healthcare divisions. "We are excited about the new opportunities this brings for both our clients and employees."

Valesta Clinical Research Solutions operates in the United States, Belgium, Netherlands, and Spain. Learn more at http://www.valesta.com.

About On Assignment

On Assignment, Inc. (NASDAQ: ASGN), is a leading global provider of highly skilled, hard-to-find professionals in the growing life sciences, healthcare, and technology sectors, where quality people are the key to success. The company goes beyond matching résumés with job descriptions to match people they know into positions they understand for temporary, contract-to-hire, and direct hire assignments. Clients recognize On Assignment for their quality candidates, quick response, and successful assignments. Professionals think of On Assignment as career-building partners with the depth and breadth of experience to help them reach their goals.

On Assignment was founded in 1985 and went public in 1992. The corporate headquarters are located in Calabasas, California, with a network of approximately 78 branch offices throughout the United States, Canada, United Kingdom, Netherlands, Ireland, Spain, and Belgium. Additionally, physician placements are made in Australia and New Zealand. To learn more, visit http://www.onassignment.com.

On Assignment, Inc.
Jim Brill
SVP, Finance and Chief Financial Officer
818-878-7900