Philip F. Plummer, 59, a civilian official of the Navy Department who had served on active duty with that service for more than 20 years before retiring as a commander in 1969, died of cancer Oct. 22 at the Hospice of Northern Virginia. He lived in Arlington.

Cmdr. Plummer was a native of Tyrone, Pa., and a 1946 graduate of the U.S. Naval Academy at Annapolis. During his years on active duty, he was a pilot in an attack squadron aboard the carrier Midway, a flight instructor at Pensacola, and served on the staffs of the Supreme Allied Commander, Atlantic, and the Joint Chiefs of Staff.

He became a civilian employe of the Navy in 1969, as deputy comptroller of the old Naval Command Systems Support Activity. At the time of his death, he was head of the management support directorate of the Navy Regional Data Automation Center (NARDAC) at the Washington Navy Yard.

Cmdr. Plummer was a member of the Cherrydale Methodist Church in Arlington. He was a member of the American Legion, Retired Officers Association, and the Army Navy Country Club.

Survivors include his wife, Kathleen, and a daughter, Kimberly, both of Arlington; a brother, William A., of Oldsmar, Fla., and a sister, Ruth Fagan of Bloomsburg, Pa.