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Department of Defense HQ (DOD HQ)

Headquartered in Arlington, Va.

| Official Web site

The Department of Defense (DOD) was first established as the National Military Establishment by the National Security Act of 1947 and redesignated as a department by the amendments of 1949. It is an executive department (10 U.S.C. 111) headed by the secretary of defense. The DOD is responsible for providing the military forces needed to deter war and protect the security of the United States. The major elements of these forces are the Army, Navy, Marine Corps and Air Force, consisting of about 1.3 million men and women on active duty. They are backed, in case of emergency, by the 825,000 members of the Reserve and National Guard. In addition, there are about 600,000 civilian employees in the DOD.

Source: Adapted from U.S. government regulations, "U.S. Government Manual", and "An Overview of the U.S. Intelligence Community"
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Top Secret Work
Number of Work Locations

80

Number of Contracting Clients

291

Types of Work (15)  
Types of Work
The Post has divided Top Secret work into ten categories. Companies' work for the government falls under the type(s) shown. For a detailed description of a category, click on the function or type it into one of our searches.
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