Radisys Announces New Board Member

HILLSBORO, OR — March 15 , 2011— Radisys® Corporation (NASDAQ: RSYS), a leading provider of innovative hardware and software platforms for next generation IP-based wireless, wireline and video networks, announced the appointment of David Nierenberg to its Board of Directors, effective March 16, 2011. Mr. Nierenberg has extensive experience in corporate strategy, corporate governance, management consulting and venture capital and public company investing. Mr. Nierenberg is the President of Nierenberg Investment Management Company, which is a long-term shareholder of Radisys.

Commenting on the appointment, Scott Grout, Radisys President and CEO stated, “I am very pleased that David has agreed to serve as a member of our Board of Directors. As our largest shareholder over the past six plus years, David has provided valuable insight in a number of strategic areas, and we are excited to now bring him on as part of the Board. David brings experience in business strategy, capital markets and M&A and is an active member of other public and private companies.”

David Nierenberg is the founder and President of Nierenberg Investment Management Company, Inc. He currently serves on the Board of Directors of Electro Scientific Industries along with other private companies. Previously, Mr. Nierenberg was with venture capital firms Trinity Ventures and G.E. Venture Capital. He started his career in management consulting with Bain & Company, eventually becoming a partner. He holds both a Bachelor of Arts and Juris Doctor from Yale University.

About Radisys

Radisys (NASDAQ: RSYS), a global leader in open telecom solutions, enables service providers to drive disruption with new open architecture business models. Radisys’ innovative disaggregated and virtualized enabling technology solutions leverage open reference architectures and standards, combined with open software and hardware to power business transformation for the telecom industry, while its world-class services organization delivers systems integration expertise necessary to solve communications and content providers’ complex deployment challenges.

Radisys, Continuous Computing and Trillium are registered trademarks of Radisys Corporation.