Master Sergeant Jock was a veteran of World War II. In Korea, he was a member of Battery A, 955th Field Artillery Battalion, U.S. Army. He was listed as Missing in Action while fighting the enemy as a part of IX Corps Artillery north of Kumbwa, North Korea on July 14, 1953. He was presumed dead on July 15, 1954. His name is permanently inscribed on the Courts of the Missing at the Honolulu Memorial. MSGT Jock's remains were recovered and then identified in 2014.