The United States secretary of defense (SecDef) is the head of the United States Department of Defense (DoD), the executive department of the U.S. Armed Forces, and is a high-ranking member of the federal cabinet. The secretary of defense's position of command and authority over the military is second only to that of the president of the United States, who is the commander-in-chief. This position corresponds to what is generally known as a defense minister in many other countries. The president appoints the secretary of defense with the advice and consent of the Senate, and is by custom a member of the Cabinet and by law a member of the National Security Council.
The secretary of war was a member of the U.S. president's Cabinet, beginning with George Washington's administration. A similar position, called either "Secretary at War" or "Secretary of War", had been appointed to serve the Congress of the Confederation under the Articles of Confederation between 1781 and 1789. Benjamin Lincoln and later Henry Knox held the position. When Washington was inaugurated as the first President under the Constitution, he appointed Knox to continue serving as Secretary of War.
The secretary of the Navy (SECNAV) is a statutory officer and the head of the Department of the Navy, a military department within the United States Department of Defense.
The Joint Chiefs of Staff (JCS) is the body of the most senior uniformed leaders within the United States Department of Defense, which advises the president of the United States, the secretary of defense, the Homeland Security Council and the National Security Council on military matters. The composition of the Joint Chiefs of Staff is defined by statute and consists of a chairman (CJCS), a vice chairman (VJCS), the chiefs of the Army, Marine Corps, Navy, Air Force, Space Force, and the chief of the National Guard Bureau. Each of the individual service chiefs, outside their JCS obligations, works directly under the secretaries of their respective military departments, e.g. the secretary of the Army, the secretary of the Navy, and the secretary of the Air Force.
The United States order of precedence is an advisory document maintained by the Ceremonials Division of the Office of the Chief of Protocol of the United States which lists the ceremonial order, or relative preeminence, for domestic and foreign government officials at diplomatic, ceremonial, and social events within the United States and abroad. The list is used to mitigate miscommunication and embarrassment in diplomacy, and offer a distinct and concrete spectrum of preeminence for ceremonies. Often the document is used to advise diplomatic and ceremonial event planners on seating charts and order of introduction. Former presidents, vice presidents, first ladies, second ladies, and secretaries of state and retired Supreme Court justices are also included in the list.
The secretary of the Air Force, sometimes referred to as the secretary of the Department of the Air Force, is the head of the Department of the Air Force and the service secretary for the United States Air Force and United States Space Force. The secretary of the Air Force is a civilian appointed by the president, by and with the advice and consent of the Senate. The secretary reports to the secretary of defense and/or the deputy secretary of defense, and is by statute responsible for and has the authority to conduct all the affairs of the Department of the Air Force.
The chief of staff of the Army (CSA) is a statutory position in the United States Army held by a general officer. As the highest-ranking officer assigned to serve in the Department of the Army, the chief is the principal military advisor and a deputy to the secretary of the Army. In a separate capacity, the CSA is a member of the Joint Chiefs of Staff and, thereby, a military advisor to the National Security Council, the secretary of defense, and the president of the United States. The CSA is typically the highest-ranking officer on active duty in the U.S. Army unless the chairman or the vice chairman of the Joint Chiefs of Staff are Army officers.
Peter Jan Schoomaker is a retired four-star general of the United States Army who served as the 35th Chief of Staff of the United States Army from June 2003 to April 2007. Schoomaker's appointment as Chief of Staff was unusual in that he was recalled and came out from retirement to assume the position. Schoomaker voluntarily retired from the Army for the second time in 2007 after completing the full four-year term as Chief of Staff.
Kenneth Claiborne Royall Sr. was a U.S. Army general and the last man to hold the office of Secretary of War, which was abolished in 1947. Royall served as the first Secretary of the Army from 1947 to 1949, until he was compelled into retirement for refusing to comply with President Harry S. Truman's Executive Order 9981 for the racial desegregation of the military forces of the United States.
The United States Department of the Army (DA) is one of the three military departments within the Department of Defense of the U.S. The Department of the Army is the federal government agency within which the United States Army (U.S.) is organized, and it is led by the secretary of the Army, who has statutory authority under 10 United States Code § 7013 to conduct its affairs and to prescribe regulations for its government, subject to the limits of the law, and the directions of the secretary of defense and the president.
The United States Department of the Air Force (DAF) is one of the three military departments within the Department of Defense of the United States of America. The Department of the Air Force was formed on September 18, 1947, per the National Security Act of 1947 and it is the military department within which the United States Air Force and the United States Space Force are organized.
Michael Luis Dominguez retired as the Principal Deputy Under Secretary of Defense for Personnel and Readiness within the United States Department of Defense. He has held that position since his confirmation by the United States Senate on July 11, 2006.
The United States under secretary of the Army is the second-highest-ranking civilian official of the United States Department of the Army, serving directly under the United States Secretary of the Army. The Secretary and Under Secretary, together with two military officers, the Chief of Staff of the United States Army and the Vice Chief of Staff of the United States Army, constitute the senior leaders of the United States Army.
The under secretary of the Air Force, sometimes referred to as the under secretary of the Department of the Air Force, is the second-highest ranking civilian official in the Department of the Air Force of the United States of America, serving directly under the secretary of the Air Force. In the absence of the secretary, the under secretary exercises all the powers and duties of the secretary and serves as acting secretary when the position of secretary is vacant. The under secretary of the Air Force is appointed by the President, by and with the advice and consent of the Senate.
Bernard Daniel Rostker was Principal Deputy Assistant Secretary of the Navy from 1977 to 1979; 5th Director of the Selective Service System from 1979 to 1981; Assistant Secretary of the Navy from 1994 to 1998; Under Secretary of the Army from 1998 to 2000; and Under Secretary of Defense for Personnel and Readiness in 2000–2001. From 1996 to 2001, he also served as Special Assistant to the Deputy Secretary of Defense for Gulf War Illnesses.
John William Shannon Sr. was United States Under Secretary of the Army from 1989 to 1993.
The Assistant Secretary of the Army (Manpower and Reserve Affairs), abbreviated as ASA(M&RA), is a civilian official in the United States Department of the Army.
The United States Department of Defense (DoD) has a complex organizational structure. It includes the Army, Navy, the Marine Corps, Air Force, Space Force, the Unified combatant commands, U.S. elements of multinational commands, as well as non-combat agencies such as the Defense Intelligence Agency and the National Security Agency. The DoD's annual budget was roughly US$496.1 billion in 2015. This figure is the base amount and does not include the $64.3 billion spent on "War/Non-War Supplementals". Including those items brings the total to $560.6 billion for 2015.
Judd Henry Lyons is a retired Army National Guard officer. After retiring from the military the rank of major general, he was appointed to the Senior Executive Service on August 7, 2017. Since 2018, he has served as Deputy Assistant Secretary of Defense. In this role, he is the principal advisor to the Assistant Secretary of Defense for Manpower and Reserve Affairs in support of the ASD's role of providing overall supervision of manpower and reserve affairs for the Department of Defense. He is responsible for both the integration of reserve affairs across the United States Department of Defense and strategic engagement on all Reserve Component matters.
