Thomas Christie began his career in the Department of Defense and related positions in 1955. He retired from the Pentagon in February 2005 after four years as director of Operational Test & Evaluation. There he was responsible for advising the secretary of defense on policy and procedures for testing weapon systems and for providing independent evaluations of the test results to both the defense secretary and Congress. He earlier served as director of the Operational Evaluation Division at the Institute for Defense Analyses, where he was also intimately involved in DOD weapons testing. Between 1985 and 1989, he was director of program integration in the Office of the Secretary of Defense, responsible for developing processes for managing the defense acquisition system. Prior to that, he had served in two separate positions under the assistant secretary of defense (Program Analysis and Evaluation): director of tactical air division and deputy assistant secretary of defense for General Purpose Programs. Before coming to the Pentagon in 1973, Christie was the director of the Weapon System Analysis Division at the Air Force Armament Laboratory, Eglin Air Force Base, Fla., where he had begun his career as a weapons analyst.