Frank Carlucci Frank Carlucci Frank Charles Carlucci III (October 18, 1930 – June 3, 2018) was an American politician and diplomat who served as the United States Secretary of Defense from 1987 to 1989 in the administration of President Ronald Reagan. Carlucci served in a variety of senior-level governmental positions, including Director of the Office of Economic Opportunity in the Richard Nixon administration, Deputy Director of the CIA in the Jimmy Carter administration, and Deputy Secretary of Defense and National Security Advisor in the Reagan administration. Carlucci was born in Scranton, Pennsylvania, the son of Roxanne (née Bacon) and Frank Charles Carlucci,
United States Secretary of Defense Department of Defense, "the principal assistant to the President in all matters relating to Department of Defense", and has "authority, direction and control over the Department of Defense". Because the Constitution vests all military authority in Congress and the President, the statutory authority of the Secretary of Defense is derived from their constitutional authorities. Since it is impractical for either Congress or the President to participate in every piece of Department of Defense affairs, the Secretary of Defense, and the Secretary's subordinate officials generally exercise military authority. As the head of DoD, all officials, employees and service members are "under"