ManTech Schedules Fourth Quarter Fiscal Year 2012 Earnings Release And Conference Call For Feb. 20, 2013

ManTech International Corporation (NASDAQ: MANT) will issue its fourth quarter fiscal year 2012 earnings press release after close of market Wednesday, Feb. 20, 2013. Management will discuss financial results in a conference call beginning at 5 p.m. Eastern.

Analysts may participate in the conference call by dialing 877-440-7573 (domestic) or 253-237-1144 (international) and entering pass code 87087548. The conference call will be webcast simultaneously to the public through a link on the Investor Relations section of the ManTech website ( http://investor.mantech.com).

A replay of the conference call will be available by telephone approximately two hours after conclusion of the call through Feb. 27, 2013, by dialing 855-859-2056 (domestic) or 404-537-3406 (international) and entering pass code 87087548. In addition, a replay of the webcast will be available on the ManTech website approximately two hours after the conclusion of the conference call.

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.

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