The Office of the Chief of Army Reserve (OCAR) is located at Fort Belvoir, Virginia, and provides the Chief of Army Reserve (CAR) with a staff of functional advisors who develop and execute Army Reserve plans, policies and programs, plus administer Army Reserve personnel, operations and funding.

OCAR is made up of specialized groups that advise and support the CAR on a wide variety of issues.

The Chief, US Army Reserve (CAR), Major General William Ward became the first USARC commander.

During the tenure of MG Sandler the five continental Armys (CONUSAS) transferred their previous command and management responsibilities to the USARC, putting total command and control of the subordinate units under the USARC.

The two eagles' heads of the shoulder sleeve insignia for OCAR are in reference to the motto of United States Army Reserve Command, "Twice the Citizen", and its mission.