USMA Class of 1948, Captain Hyman commanded Company A, 1st Battalion, 34th Infantry Regiment, 24th Infantry Division. He was listed as Missing in Action while fighting the enemy in South Korea on July 30, 1950. He was presumed dead on December 31, 1953. His remains were recovered in 2019. His name is inscribed on the Courts of the Missing at the Honolulu Memorial, he is buried at the Arlington National Cemetery.