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About United States Department of Defense

No matter how you measure it, by aircraft, ships, or active-duty military personnel, the US Department of Defense (DoD) is big. Except for Social Security, the Department of Defense -- comprising the Army, Navy (of which the Marine Corps is a component), and Air Force-- is the largest component of US government spending. The 2019 budget for the Department of Defense is more than $685 billion, 10% of which will be used to fund the ongoing military engagements in Afghanistan and Iraq. The DoD maintains a force of more than 2.1 million active duty service members and operates thousands of facilities around the world.

Geographic Reach

The Department of Defense is headquartered at the Pentagon, located in Arlington, Virginia. The company operates in more than 160 countries in seven continents, with approximately 4,800 defense sites.


The company's strategic goals are: rebuild military readiness and build a more lethal joint force; strengthen its alliances & attract new partners; and reform the Department's business practices for greater performance and affordability.

The Department developed an acquisition strategy to support the issuance of the Defense Enterprise Office Solution (DEOS) RFQ. The DEOS contract will create an enterprise collaboration capability for the Department to enable the migration of over 3.1 million Non-classified Internet Protocol Router (NIPR) Network users and over 600 thousand Secret Internet Protocol Router (SIPR) Network users to an enterprise collaboration solution.

Company Background

The Army, Navy, and Marine Corps were established in 1775, in concurrence with the American Revolution. In 1789, the War Department was established and was precursor to what is now the Depart of Defense. The Coast Guard (part of the Department of Homeland Security during peace time) was established in 1790. 

The National Security Act of 1947 renamed the Department of War as the Department of the Army, created the Department of the Air Force, and unified command of the Military Departments under the "National Military Establishment" headed by a Secretary of Defense. The Department of Defense Reorganization Act of 1958 established the Combatant Commands.

United States Department of Defense

1000 Defense Pentagon STE 3
Washington, DC 20301-1000
Phone: 1 (703) 692-7100

Firm Stats

Employer Type: Privately Owned
Employees (This Location): 5,000
Employees (All Locations): 1,369,022

Major Office Locations

Washington, DC