business in furtherance of the responsibilities and mission of NCIS. Organizational structure The Naval Criminal Investigative Service is headed by the director of NCIS who is directly responsible to the Secretary of the Navy for the operations of NCIS. The director is supervised by the Under Secretary of the Navy with the assistance of the General Counsel of the Navy and receives guidance from the NCIS Board of Directors, an advisory group chaired by the Under Secretary of the Navy that includes the General Counsel of the Navy, Vice Chief of Naval Operations, Assistant Commandant of the Marine Corps, and the director of NCIS. The director directs and supervises the activities of NCIS and exercises leadership through a strategic vision and exercises his/her direction through the deputy directors. The NCIS currently has two deputy directors, the deputy director of operations, who is responsible for the day-to-day oversight and management of the operational directorates, and the deputy director of operational support, who is responsible for the day-to-day oversight and management of the support directorates. The operational and support directorates are managed by an executive assistant director with the exception of some support directorates, which are managed by an assistant director. An assistant director is also assigned to some operational and support directorates to serve as the chief operations officer, responsible for assisting the EAD with the day-to-day oversight and management of the directorate. Headquarters NCIS Headquarters, Russell-Knox Building, Marine Corps Base Quantico, Virginia. The Russell-Knox Building also houses the headquarters of the United States Army Criminal Investigation Division, Department of the Air Force Office of Special Investigations, and the Defense Counterintelligence and Security Agency. Components of the Defense Intelligence Agency are also located at RKB. The Russell-Knox Building (RKB), named after U.S. Marine Corps Major General John Henry Russell, Jr. and U.S. Navy Commodore Dudley Wright Knox, was built based on the findings of the 2005 Base Realignment and Closure Commission. The commission authorized the project to build the RKB as there was a need to co-locate the headquarters of the different criminal investigative agencies of the U.S. military. Before the NCIS headquarters was moved to the Russell-Knox Building in 2011, it was located at the Washington Navy Yard in Washington, D.C. Office of the Director The Office of the director serves as the central administrative arm of the director. The office encompasses the director, the deputy directors, and the director's