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 United States National Security Council (NSC) is the national security council used by the president of the United States for consideration of national security, military, and foreign policy matters. Based in the White House, it is part of the Executive Office of the President of the United States, and composed of senior national security advisors and Cabinet officials.
The National Security Act of 1947 was a law enacting major restructuring of the United States government's military and intelligence agencies following World War II. The majority of the provisions of the act took effect on September 18, 1947, the day after the Senate confirmed James Forrestal as the first secretary 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 secretary of the Army is a senior civilian official within the United States Department of Defense, with statutory responsibility for all matters relating to the United States Army: manpower, personnel, reserve affairs, installations, environmental issues, weapons systems and equipment acquisition, communications and financial management.
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 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.
A unified combatant command, also referred to as a combatant command (CCMD), is a joint military command of the United States Department of Defense that is composed of units from two or more service branches of the United States Armed Forces, and conducts broad and continuing missions. There are currently 11 unified combatant commands, and each is established as the highest echelon of military commands, in order to provide effective command and control of all U.S. military forces, regardless of branch of service, during peace or during war time. Unified combatant commands are organized either on a geographical basis or on a functional basis, e.g., special operations, force projection, transport, and cybersecurity. Currently, seven combatant commands are designated as geographical, and four are designated as functional. Unified combatant commands are "joint" commands and have specific badges denoting their affiliation.
Robert Michael Kimmitt was United States Deputy Secretary of the Treasury under President George W. Bush. He was nominated by President Bush on June 29, 2005. The United States Senate unanimously confirmed him on July 29, 2005, and he was sworn into office on August 16, 2005. Kimmitt served through the end of the Bush administration, leaving office on January 20, 2009.
William E. "Kip" Ward is a retired United States Army three-star general who served as the inaugural Commander of United States Africa Command from 1 October 2007 to 8 March 2011. During his long career in public service, he has taught international affairs and relations at West Point, US Military Academy; served as Commander of Stabilization Force, Operation Joint Forge, Sarajevo, Bosnia; was appointed the Secretary of State's Security Coordinator to the Israel - Palestinian Authority; Deputy Commander, Headquarters US European Command, Stuttgart, Germany; and many other progressively responsible assignments. He later retired and served as President and chief operating officer of the logistics, IT, and engineering business, Vectrus.
The United States Department of Defense is an executive branch department of the federal government of the United States charged with coordinating and supervising all agencies and functions of the U.S. government directly related to national security and the United States Armed Forces. As of November 2022, the U.S. Department of Defense is the second largest employer in the world after India, with over 1.4 million active-duty service personnel, including soldiers, marines, sailors, airmen, and guardians. The Department of Defense also maintains over 778,000 National Guard and reservists, and over 747,000 civilians, bringing the total to over 2.91 million employees. Headquartered at the Pentagon in Arlington County, Virginia, just outside Washington, D.C., the Department of Defense's stated mission is "to provide the military forces needed to deter war and ensure our nation's security".
The Under Secretary of Defense for Acquisition and Sustainment, or USD (A&S), is the Principal Staff Assistant (PSA) and advisor to the Secretary of Defense for all matters relating to acquisition and sustainment in the Department of Defense. This includes the DoD Acquisition System; system design and development; production; logistics and distribution; installation maintenance, management, and resilience; military construction; procurement of goods and services; material readiness; maintenance; environment and energy resilience ; utilities; business management modernization; International Armaments Cooperation, Cooperative Acquisition and International Agreements, Promoting exportability of military components to allies and partners; nuclear, chemical and biological defense programs; and nuclear command, control, and communications.
The Assistant Secretary of the Air Force (SAF/AQ) is a civilian position in the Department of the Air Force that is appointed by the president of the United States and confirmed by the United States Senate. This position is established under Title 10 US Code Section 9016 and is one of five Assistant Secretary positions under the Secretary of the Air Force. The Assistant Secretary reports to the Secretary of the Air Force.
Joseph Francis Dunford Jr. is a retired United States Marine Corps general who served as the 19th chairman of the Joint Chiefs of Staff from 1 October 2015 to 30 September 2019. He was the 36th commandant of the Marine Corps. Dunford is the first Marine Corps officer to serve in four different four-star positions; the others include commander of the International Security Assistance Force and United States Forces – Afghanistan from February 2013 to August 2014, and as the thirty-second assistant commandant of the Marine Corps from 23 October 2010 to 15 December 2012. He has commanded several units, including the 5th Marine Regiment during the 2003 invasion of Iraq.
The Under Secretary of Defense for Research and Engineering, abbreviated USD (R&E), is a senior official of the United States Department of Defense. The USD (R&E) is charged with the development and oversight of technology strategy for the DoD. The post has at various times had the titles Assistant Secretary of Defense for Research and Engineering, or Director of Defense Research and Engineering (DDR&E). The latter title has itself historically varied between the rank of under secretary and that of assistant secretary.
The Military Secretary to the Commandant of the Marine Corps is the senior advisor and task manager for the Commandant of the Marine Corps. Personally selected by the Commandant, the Military Secretary is an active duty colonel who reports directly to the Commandant. The exact duties of the Military Secretary have varied based on the needs and preferences of each Commandant. There are no existing manuals or orders that dictate the exact role of the Military Secretary. They run the day-to-day operations of the Office of the Commandant, supervises the schedule of the Commandant, and performs other duties as the Commandant may direct. In order to perform the multi-faceted duties of the Military Secretary, the Marine must be well versed in all aspects of the United States Marine Corps, the United States Department of Defense, and the United States Government.
The Assistant Secretary of Defense for Indo-Pacific Security Affairs, or ASD (IPSA), is the principal advisor to the Under Secretary of Defense for Policy (USD(P)) and the Secretary of Defense on international security strategy and policy on issues of DoD interest that relate to the governments and defense establishments of the nations and international organizations within the Indo-Pacific region. It primarily includes the entire region from India to Japan, and the region where ASEAN is located. The position was originally titled Assistant Secretary of Defense for Asian and Pacific Security Affairs but was renamed by the first Trump Administration alongside the renaming of the United States Indo-Pacific Command.
