Crystal City, Arlington, Virginia Crystal City, Arlington, Virginia Crystal City is an urban neighborhood in the southeastern corner of Arlington County, Virginia, south of downtown Washington, D.C. Due to its extensive integration of office buildings and residential high-rise buildings using underground corridors, travel between stores, offices, and residences is possible without going above ground; thus, a large part of Crystal City is an underground city. Crystal City includes offices of numerous defense contractors, the United States Department of Labor, the United States Marshals Service and many satellite offices for The Pentagon. It is also the location of Ronald Reagan Washington National Airport. Crystal City
Department of the Army Civilian Police "Department of Defense Police" is a catch-all phrase that refers to any civilian engaged in police duties for the Department of Defense and its component branches of the US Armed Forces. There is no such unified agency that goes under the title "Department of Defense Police". A Fort Irwin Department of the Army Civilian Police Officer is assigned the federal occupational series code "0083", the code reserved for police and federal protective officers in the U.S. Government civil service. This occupational series code applies regardless of what specific agency of the officer works for. Individual installations conduct the hiring process