ManTech International Corporation (Nasdaq:MANT), a leading provider of innovative technologies and solutions focused on mission-critical national security programs for the Intelligence Community and the Departments of Defense, State, Homeland Security, Justice and other federal government customers announced today that Ronald R. Spoehel is resigning his management and director roles and will join ICX Technologies, Inc. Kevin M. Phillips, the company's Corporate Vice President and Chief of Staff has been named interim Chief Financial Officer while a search for a replacement is conducted. The Audit Committee of ManTech's Board of Directors will lead the formal search for Mr. Spoehel's permanent replacement and has retained a search firm to assist the Board in conducting a national search. <br /><br />"Ron has played an instrumental role in our success during a period of strong growth for the company," said George J. Pedersen, Chairman of the Board and Chief Executive Officer, ManTech International Corporation. "We appreciate his efforts and wish him continued success in his future endeavors."