ManTech International Corporation (NASDAQ: MANT) has named Daniel J. Keefe President and Chief Operating Officer of its Technical Services Group. Brigadier General Keefe, U.S. Army (Ret) was previously Executive Vice President and general manager of the group. The Technical Services Group is the largest operational unit within ManTech and provides mission-critical technology services and solutions globally, to include all aspects of C4ISR, systems sustainment, logistics and systems engineering to the Department of Defense and Department of State. Keefe replaces Louis M. Addeo, who will be promoted to Executive Vice President for Corporate Development and Strategic Acquisitions. In this new role, Mr. Addeo will have responsibility for expanding the business portfolio beyond markets currently served by the corporation. Both Keefe and Addeo will report directly to Chairman and Chief Executive Officer, George J. Pedersen. “Our excellent performance on behalf of our customers and their mission, management depth and strong balance sheet ensure we enter 2013 well positioned for long-term growth,” said Pedersen. “ManTech enjoys a long history of successfully adapting quickly to new markets and changing environments, and these new assignments for Dan and Lou further our efforts to maximize our growth potential.” About ManTech International Corporation ManTech is a leading provider of innovative technologies and solutions for mission-critical national security programs for the intelligence community; the Department of Defense, including its health organizations; the departments of State, Homeland Security, Energy and Justice, including the Federal Bureau of Investigation (FBI); the space community; and other U.S. federal government customers. We provide support to critical national security programs for approximately 60 federal agencies through approximately 1,000 current contracts. ManTech's expertise includes command, control, communications, computers, intelligence, surveillance and reconnaissance (C4ISR) lifecycle support; cyber security; global logistics support; intelligence/counter-intelligence support; information technology (IT) modernization and sustainment; systems engineering; test and evaluation; and health IT. ManTech supports major national missions, such as military readiness, terrorist threat detection, information security and border protection. Additional information on ManTech can be found at www.mantech.com. Forward-Looking Information Statements and assumptions made in this press release, which do not address historical facts, constitute "forward-looking" statements that ManTech believes to be within the definition in the Private Securities Litigation Reform Act of 1995 and involve risks and uncertainties, many of which are outside of our control. Words such as "may," "will," "expect," "intend," "anticipate," "believe," or "estimate," or the negative of these terms or words of similar import are intended to identify forward-looking statements.