Corporal Aguilar was a Heavy Weapons Infantryman with Company M, 3rd Battalion, 35th Infantry Regiment, 25th Infantry Division. He was listed as Missing in Action while fighting the enemy along the Kuryong River near Ipsok, North Korea, on 28 November 1950. He was presumed dead on 31 December 1953. His remains were not recovered. His name is inscribed on the Courts of the Missing at the Honolulu Memorial.

For his leadership and valor, Corporal Aguilar was awarded the Bronze Star Medal, the Purple Heart, the Combat Infantryman's Badge, the Korean Service Medal, the United Nations Service Medal, the National Defense Service Medal, the Korean Presidential Unit Citation and the Republic of Korea War Service Medal.