Sourcefire® Expands Board of Directors with Addition of Veteran Industry and Military Leaders; Ciena Chief Financial Officer to Chair Audit Committee; Former Air Force Inspector General to Chair Nominating and Corporate Governance Committee

Business Wire, Sept 12, 2006

COLUMBIA, Md. -- Open source innovator, Sourcefire, Inc., a leader in network intrusion prevention, today announced that it has added Joseph R. Chinnici, Senior Vice President, Finance, and Chief Financial Officer at Ciena Corporation, and retired Air Force Lieutenant General Steven R. Polk, to the Sourcefire Board of Directors.

"Sourcefire's achievements in the highly competitive network security industry are a credit to the company's exceptionally strong Board of Directors. Joe and Steve add to this strength and will be critical contributors to our continued success," said Wayne Jackson, CEO of Sourcefire. "Their diverse skills will enable the company to refine its financial and governance structures and processes, while maintaining the agility we have demonstrated over the last five years."

Joseph R. Chinnici has been with Ciena Corporation since 1994. He has served as Senior Vice President, Finance and Chief Financial Officer since August 1997. He previously served as Vice President, Finance and Chief Financial Officer from May 1995 and as Controller when he joined the company in September 1994. With nearly 30 years of experience in finance, Mr. Chinnici previously held a variety of accounting and finance positions at Halston Borghese Inc. and Playtex Apparel, Inc. (now a division of Sara Lee Corporation).

A thirty-eight year Air Force veteran, Lieutenant General Steven R. Polk retired in February 2006 after serving as Inspector General of the Air Force since 2003. In this role he led a team of over 2,500 professionals with missions that included evaluating the combat readiness of the Air Force combat force; managing criminal investigations and counter-intelligence activities; and resolving complaints. Previously, General Polk served as Vice Commander, Pacific Air Forces, the number two officer in the command responsible for Air Force operations in the Pacific Rim region. In that capacity, he oversaw 45,000 personnel, ten bases and over 300 aircraft based principally in Hawaii, Alaska, Guam, Korea and Japan.

About Sourcefire

Sourcefire, Inc., a world leader in intrusion prevention, is transforming the way organizations manage and minimize network security risks with its 3D Approach - Discover, Determine, Defend - to securing real networks in real-time. The company's ground-breaking network defense system unifies intrusion and vulnerability management technologies to provide customers with superior network security. Founded in 2001 by the creator of Snort(R), Sourcefire is headquartered in Columbia, MD and has been consistently recognized for its innovation and industry leadership by customers, media, and industry analysts alike - with more than 18 awards and accolades since January 2005 alone. Recently, the company was positioned in the Leaders Quadrant of Gartner's "Magic Quadrant for Network Intrusion Prevention System Appliances" report and the Sourcefire 3D System was named "Best Security Solution," at the 2006 SC Magazine Awards. At work in leading Fortune 1000 and government agencies, the names Sourcefire and founder Martin Roesch have grown synonymous with innovation and intelligence in network security.

For more information about Sourcefire, please visit http://www.sourcefire.com.

Sourcefire is a registered trademark of Sourcefire, Inc.