Retired Navy Capt. Clement D. Hamm Jr., 53, a veteran of the Vietnam conflict who retired from the service in August as deputy director of the Naval Council of Personnel Boards, died of cancer Sept. 10 at the Bethesda Naval Hospital. He lived in McLean.

Capt. Hamm served in Vietnam during the late 1960s, as assistant plans officer of the commander of U.S. Naval Forces in Vietnam, and as a naval advisor to the South Vietnamese Navy.

He came to Washington in 1973 and joined the information systems division of the Office of the Chief of Naval Operations. He then became chief of the readiness, operations, and planning systems division of the Joint Chiefs of Staff. He was inspector general of the Naval Automation Command before joining the Council of Personnel Boards.

Capt. Hamm was a native of Henderson, N.C. He was a 1953 graduate of the U.S. Naval Academy at Annapolis, the Naval Postgraduate School, and the Naval War College. He earned a master's degree in international relations at George Washington University. His shipboard assignments included tours aboard destroyers and cruisers.

His decorations included the Legion of Merit, Distinguished Service Medal, and the Defense Meritorious Service Medal.

Capt. Hamm was a member of the McLean Presbyterian Church.

Survivors include his wife, Helen White Hamm of McLean; a son, Eugene Cory Hamm of Norfolk; a daughter, Margaret Lee Cassidy of Falls Church; his father, Clement D., of Henderson, and a sister, Margaret Goodrich of Camden, S.C.