USMTM is a Joint Command composed of officers and enlisted personnel from the Army, Navy, Air Force and Marine Corps. The head of USMTM carries the title of "Chief" and is also designated the senior U.S. Defense Representative (USDR) for the Kingdom of Saudi Arabia.[1] USMTM is the primary liaison between U.S. Armed Forces and the Saudi Arabian Ministry of Defense and Aviation (MODA), the Saudi counterpart to the American Joint Chiefs of Staff.