The Office of the Secretary of Defense Identification Badge is a military badge issued to members of the United States armed forces who are permanently assigned to the Office of the Secretary of Defense (OSD) and its subordinate offices, and in addition, to some of the Defense Agencies and Department of Defense Field Activities.
The badge was first created in 1949 and was referred to as the "National Military Establishment Identification Badge." In 1950, the badge was renamed as "Department of Defense Identification Badge." On December 20, 1962 the badge was given its current name.
It is issued as a permanent decoration and is to be worn for the remainder of an individual's military career, provided that a service member served at least one year (two years for Reserve personnel not on active duty) in or in support of OSD. Personnel who are awarded the badge include all military personnel, when they are assigned on a permanent basis to any of the following organizational elements: