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) is a leading provider of embedded wireless infrastructure solutions for telecom, aerospace, defense and public safety applications. Radisys’ market-leading ATCA, IP Media Server and COM Express platforms coupled with world-renowned Trillium software, services and market expertise enable customers to bring high-value products and services to market faster with lower investment and risk. Radisys solutions are used in a wide variety of 3G & 4G / LTE mobile network applications including: Radio Access Networks (RAN) solutions from femtocells to picocells and macrocells, wireless core network applications, Deep Packet Inspection (DPI) and policy management; conferencing and media services including voice, video and data, as well as customized mobile network applications that support the aerospace, defense and public safety markets.

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