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 part of its Defense Reform Initiative) that the position should be eliminated. Congress insisted that the Pentagon maintain the office, arguing it was necessary to ensure appropriate senior-level policy oversight and implementation guidance within the Department of Defense. In January 2011, President Obama signed the National Defense Authorization Act for FY 2011, renaming the Assistant to the Secretary of Defense for Nuclear & Chemical & Biological Defense Programs the Assistant Secretary of Defense for Nuclear, Chemical & Biological Defense Programs. The table below includes both the various titles of this post over time, as well as all the holders of