United States Secretary of Defense to die was Frank Carlucci (1987–1989), on 3 June 2018. United States Secretary of Defense The Secretary of Defense (SecDef) is the leader and chief executive officer of the United States Department of Defense, the executive department of the Armed Forces of the United States. The Secretary of Defense's position of command and authority over the United States' military is second only to that of the President and Congress, respectively. This position corresponds to what is generally known as a Defense Minister in many other countries. The Secretary of Defense is appointed by the President with the advice and consent
Under Secretary of Defense for Acquisition and Sustainment Under Secretary of Defense for Acquisition and Sustainment The Under Secretary of Defense for Acquisition and Sustainment, or USD(A&S), is a senior civilian official in the Office of the Secretary of Defense within the Department of Defense. USD(A&S) is the principal staff assistant and advisor to the Secretary of Defense and the Deputy Secretary of Defense for all matters concerning Departmental acquisition and sustainment. The Under Secretary is appointed from civilian life by the President with the consent of the Senate to serve at the pleasure of the President. Ellen Lord became the first Under Secretary of Defense for Acquisition