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,
Chief Management Officer of the Department of Defense Chief Management Officer of the Department of Defense The Chief Management Officer (CMO) of the United States Department of Defense (DoD) is the third-in-command of the department after the Secretary of Defense and Deputy Secretary of Defense. The position's purpose is to reduce costs by improving the quality and productivity of DoD's business operations. The CMO's office contains six "reform leaders" in the areas of logistics and supply chains, real property, community services, human resources, and health care, and a Program Executive Officer for IT Business Systems. The office also oversees Washington Headquarters Services and Pentagon Force Protection Agency, and