Private First Class Valdiviez was a member of the 31st Infantry Regiment, 7th Infantry Division. He was Killed in Action while fighting the enemy in South Korea on 14 January 1951.

Valdiviez was awarded 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.