The National Geospatial-Intelligence Agency (NGA) is a combat support agency within the United States Department of Defense whose primary mission is collecting, analyzing, and distributing geospatial intelligence (GEOINT) in support of national security. Initially known as the National Imagery and Mapping Agency (NIMA) from 1996 to 2003, it is a member of the United States Intelligence Community.
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 Naval Criminal Investigative Service (NCIS) is the primary investigative law enforcement agency of the U.S. Department of the Navy. Its primary function is to investigate major criminal activities involving the Navy and Marine Corps, though its broad mandate includes national security, counterintelligence, counterterrorism, cyberwarfare, and the protection of U.S. naval assets worldwide. NCIS is the successor organization to the former Naval Investigative Service (NIS), which was established by the Office of Naval Intelligence after the Second World War.
Fort Walker, formerly Fort A.P. Hill, is a training and maneuver center belonging to the United States Army located near the town of Bowling Green, Virginia. The center focuses on arms training and is used by all branches of the U.S. Armed Forces, independent of any post.
Washington Headquarters Services (WHS) is a Department of Defense (DoD) Field Activity, created on October 1, 1977, to provide administrative and management support to multiple DoD components and military departments in the National Capital Region and beyond.
Second Army was most recently located at Fort Belvoir, Virginia as a Direct Reporting Unit to Headquarters U.S. Army, Chief Information Officer (CIO)/G-6. Under the CIO/G-6, Second Army served as the single point of contact for Army missions and functions related to reporting on, assessing, planning, coordinating, integrating, synchronizing, directing and conducting Army network operations. This mission ended after a 2017 reorganization, when the Second Army was deactivated.
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 Under Secretary of Defense (Comptroller)/Chief Financial Officer, abbreviated USD(C)/CFO, is a high level civilian official in the United States Department of Defense. The Under Secretary of Defense (Comptroller) is the principal staff assistant and adviser to both the Secretary of Defense and the Deputy Secretary of Defense for all budgetary and fiscal matters, including the development and execution of the Defense Department's annual budget.
The United States Army Installation Management Command (IMCOM) is a support formation of the United States Army responsible for the day-to-day management of Army installations around the globe. Army garrisons are communities that provide many of the same types of services expected from any small city. IMCOM is a major subordinate command of U.S. Army Materiel Command (AMC). IMCOM is headquartered at Fort Sam Houston.
The structure of the United States Army is complex, and can be interpreted in several different ways: active/reserve, operational/administrative, and branches/functional areas.
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 U.S. Army Cyber Command (ARCYBER) conducts information dominance and cyberspace operations as the Army service component command of United States Cyber Command.
The Assistant Secretary of the Army for Installations, Energy and Environment is a civilian office within the United States Department of the Army.
The United States Army Information Technology Agency (ITA) is one of the administrative service organizations aligned under the Office of the Administrative Assistant to the Secretary of the Army (OAA). OAA has three fundamental functions. The primary mission of the organization is to provide direct support to the Secretary of the Army and other Army political appointees. The second mission is to provide administrative support to the Headquarters, Department of the Army (HQDA). The third mission is to provide base operations support to a diverse group of Army and Department of Defense (DoD) customers. OAA is organized into four major divisions: the U.S. Army Resources and Programs Agency (RPA), the U.S. Army Headquarters Services (AHS), the U.S. Army Information Technology Agency (ITA), and the U.S. Army Center of Military History (CMH). These divisions support OAA primarily in areas of IT, logistics, training, and human resources support.
The United States Army Special Operations Aviation Command (USASOAC) provides command and control, executive oversight, and resourcing of U.S. Army Special Operations Command (USASOC) aviation assets and units in support of national security objectives. USASOAC is responsible for service and component interface; training, doctrine, and proponency for Army Special Operations Aviation (SOA); system integration and fleet modernization; aviation resource management; material readiness; program management; and ASCC oversight. USASOAC was established 25 March 2011 consisting of 135 headquarters soldiers and subordinate units totaling more than 3,300 personnel, include the 160th Special Operations Aviation Regiment (Airborne), (160th SOAR (A)) which features 4 Aviation Battalions, the USASOC Flight Company, the Special Operations Aviation Training Battalion, the Systems Integration Management Office, and the Technology Application Projects Office. The first commander of USASOAC was Brig Gen. Kevin Mangum.
The United States Space Force is organized by different units: the Space Staff, the field commands, and the space deltas.
A deputy chief of space operations is a senior leadership position in the United States Space Force. There are four deputy chiefs of space operations in the Space Force, staffed either by a lieutenant general or a senior executive service personnel. They are the service's equivalent to the Army's and Air Force's deputy chiefs of staff, the Marine Corps' deputy commandants, and the Navy's deputy chiefs of naval operations. They are part of the Office of the Chief of Space Operations and hold office at the Pentagon.
The Chief Information Officer (CIO) is the principal adviser to the United States Secretary of the Army on information resource management. Created from the Army Chief Information Officer/G-6, an office which reports both to the Secretary of the Army and the Chief of Staff of the United States Army. The roles were realigned in 2020, and split into two separate positions: CIO and G6. Leonel Garciga has served as the Chief Information Officer since June 2023.
United States Army 
