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
Assistant Secretary of Defense for Nuclear, Chemical & Biological Defense Programs Assistant Secretary of Defense for Nuclear, Chemical & Biological Defense Programs. The Deputy Assistant Secretary of Defense for Chemical and Biological Defense oversees development of Chemical, Biological, Radiological and Nuclear (CBRN) defenses to protect national interests at home and abroad, handling Department of Defense efforts related to: and The Deputy Assistant Secretary for Nuclear Matters is primarily the focal point for activities and initiatives related to sustaining a safe, secure, and effective nuclear deterrent and countering threats from nuclear terrorism and nuclear proliferation. This office serves as a primary point of contact for Congress, other agencies, and the public for