Master Sergeant Harmor was a veteran of World War II. In Korea, he was a member of Company G, 2nd Battalion, 7th Infantry Regiment, 3rd Infantry Division. He was listed as Missing in Action while fighting the enemy in North Korea on 3 December 1950. He was presumed dead on 31 December 1953. His name is inscribed on the Courts of the Missing at the Honolulu Memorial.

Harmor was awarded the Purple Heart with Oak Leaf Cluster, the Combat Infantryman's Badge, the Korean Service Medal, the United Nations Service Medal, the National Defense Service Medal, the Korean Presidential Unit Citation, the Republic of Korea War Service Medal, the World War II Victory Medal and the European Theater of Operations Medal.