United States Department of Defense United States Department of Defense The Department of Defense (DoD, USDOD, or DOD) is an executive branch department of the federal government charged with coordinating and supervising all agencies and functions of the government concerned directly with national security and the United States Armed Forces. The department is the largest employer in the world, with nearly 1.3 million active duty servicemen and women as of 2016. Adding to its employees are over 826,000 National Guardsmen and Reservists from the four services, and over 742,000 civilians bringing the total to over 2.8 million employees. Headquartered at the Pentagon in Arlington, Virginia,
Ballston, Arlington, Virginia including The Nature Conservancy, the Navy-Marine Corps Relief Society, and the National Rural Electric Cooperative Association (NRECA), are located in Ballston, as are several government contractors and high tech companies, including CACI, Leidos and the headquarters of ESI International. In 2011, Accenture agreed to move its offices from Reston, Virginia, to a new facility on the corner of Wilson Boulevard and North Glebe Road in Ballston. The neighborhood is home to Washington-Lee High School. Ballston is also home to several university facilities, including: Ballston, Arlington, Virginia Ballston is a neighborhood in Arlington County, Virginia and is home to the Ballston-MU