Press Release

RadiSys To Present At The 12th Annual Needham & Company Growth Conference On January 12, 2010

HILLSBORO, Ore. —December 18, 2009 — RadiSys® Corporation (NASDAQ: RSYS), a leading global provider of advanced embedded solutions, announced that it will participate in the 12th Annual Needham & Company Growth Conference to be held on January 12, 2010 in New York, NY. Brian Bronson, RadiSys Chief Financial Officer, will present an overview of the Company's business and strategy on Tuesday, January 12, 2010 at 9:20 a.m. ET.

A live audio webcast and a replay of the event will be available on the Company's investor relations website at http://investor.radisys.com/.

For more information, contact:

Brian Bronson
Chief Financial Officer
1–503–615–1281
brian.bronson@radisys.com

Holly Stephens
Finance and Investor Relations Manager
1–503–615–1321
holly.stephens@radisys.com