PRESS RELEASE

Alexandria, Va., Jan. 5, 2010 - MANDIANT today announced it has increased its elite force of consultants by more than 65 percent in 2009, strengthening its leadership foothold as the Information Security industry's go-to provider of incident response and computer forensics services and solutions.

MANDIANT anticipates continued growth for both its services and software solution lines of business throughout 2010. MANDIANT clientele, primarily Fortune 500 corporations, government organizations and the defense industrial base, are confronted with persistent and increasingly sophisticated attacks that threaten enterprise infrastructure and national security.

"Our compelling growth is driven by the global prevalence and dangerous evolution of malware that permeates and threatens on a daily basis," said MANDIANT Executive Vice President and CFO Michael Malin. "Our best practices approach to incident response and computer forensics has dramatically reduced client downtime, mitigated financial loss, and protected the integrity of organizational infrastructure."

In addition to real-world experience as incident response and forensic analysts and federal investigators, MANDIANT consultants and principals have completed advanced degrees from some of the most prestigious computer science universities; authored seven books on incident response and computer forensics; and hold top government security clearances and industry certifications. MANDIANT also maintains a firm commitment to providing high-quality training and breakthrough freeware development.

MANDIANT Intelligent Response (MIR), the company's flagship software, is the security industry's first enterprise-grade incident response management solution. MIR accelerates the collection and analysis of data in support of incident response, electronic discovery and corporate investigations. Combining the knowledge of expert incident responders and enterprise software engineers, MIR enables precise data collection and advanced analysis in a highly scalable, multi-tier, modular appliance-based solution.

For the latest on MANDIANT's industry-leading service and solution offerings, dynamic career opportunities, and a wealth of company resources, visit the company's new and enhanced web site at http://www.mandiant.com.

About MANDIANT

MANDIANT is an information security company providing products, professional services and education to Fortune 500 companies, financial institutions, government agencies, domestic and foreign police departments and several leading U.S. law firms. MANDIANT security consultants are acknowledged experts in incident response, computer forensics, network security and application security. MANDIANT is VISA approved Qualified Incident Response Assessor. In addition to authoring seven books and numerous articles about computer forensics, incident response and rootkits, MANDIANT's consultants have been featured on news programs including CBS's 60 Minutes, CNN, NBC News and FOX News. MANDIANT operates offices in the Washington, DC area, New York City and Los Angeles. To learn more about MANDIANT, visit http://www.mandiant.com, or read M-unition, the company blog at http://blog.mandiant.com.