Private First Class Jiricek was a member of Weapons Company, 2nd Battalion, 5th Marines, 1st Marine Division. He was Killed in Action while fighting the enemy in Korea on 4 November 1952.

Jiricek was awarded the Purple Heart, the Combat Action Ribbon, 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.