This is a partial list of Agencies under the United States Department of Defense (DoD) which was formerly and shortly known as the National Military Establishment . Its main responsibilities are to control the Armed Forces of the United States. The department was established in 1947 and is currently divided into three major Departments—the Department of the Army , Navy and Air Force —and has a military staff of 1,418,542 (553,044 US Army ; 329,304 US Navy ; 202,786 US Marine Corps ; 333,408 US Air Force ). The DoD is headed by the Secretary of Defense . Currently, the DoD is led by defense secretary Lloyd Austin .
6-760: The Defense Counterintelligence and Security Agency ( DCSA ) is a federal security and defense agency of the United States Department of Defense (DoD) that reports to the Under Secretary of Defense for Intelligence . DCSA is the largest counterintelligence and security agency in the federal government and is responsible for providing personnel vetting, critical technology protection, counterintelligence , training, education and certification. DCSA services over 100 federal entities, oversees 10,000 cleared companies, and conducts approximately 2 million background investigations each year. The agency
12-443: A mission director and contain various subcomponents. DCSA Industrial Security Representatives, Counterintelligence Agents, Background Investigators, and Information System Security Professionals are credentialed Special Agents . DCSA also uses a number of contract investigators and staff to help support DCSA's various missions. The DCSA headquarters is located on Marine Corps Base Quantico . DCSA also has 167 field offices across
18-549: The Under Secretary of Defense for Intelligence . DCSA administers the NISP on behalf of the Department of Defense and 35 other federal agencies . DCSA provides oversight to approximately 10,000 cleared contract companies to ensure they are adequately protecting facilities, personnel, and associated Information Technology systems from attacks and vulnerabilities. DCSA is organized into five directorates, each of which are led by
24-422: The federal government , supervises industrial security, provides counterintelligence support to the cleared defense industrial base , and performs security education and training. DCSA also provides the uniformed US military services, Department of Defense agencies, 35 federal agencies , and approximately 10,000 cleared government contractor facilities with security support services. The Director of DCSA reports to
30-539: The United States. US military investigative organizations [REDACTED] Media related to Defense Security Service at Wikimedia Commons List of U.S. Department of Defense agencies Army Commands (MACOMs) Major Commands (MAJCOMs) Field Commands The United States has eleven Combatant Commands (COCOM); seven Geographical Combatant Commands (GCC) & four Functional Combatant Commands (FCC). GCCs: FCCs: Most information on this list
36-586: Was originally established as the Defense Investigative Service and was created on January 1, 1972. In 1999, the agency changed its name to the Defense Security Service. In July 2019, DSS was reorganized as DCSA, in conjunction with the transfer of responsibility for conducting background investigations from OPM 's National Background Investigations Bureau . DCSA conducts personnel security investigations for 95% of
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