Colonel Andrew Lech Irzyk was commissioned an Infantry Officer upon graduation from Officer Candidate School class 9-64 on 27 October 1964. His first duty assignment was as Commander Operational Detachment Alpha 27, Company C, 3rd Special Forces Group (Airborne). | His subsequent duty assignments include: Commander, Operational Detachment Alpha 4, Company A, 10th Special Forces Group (Airborne), Bad Toelz, Germany; Executive Officer, Operational Detachment Alpha 255, Company B, 5th Special Forces Group (Airborne), Plei Me, Vietnam; Executive Officer, Operational Detachment Alpha 253, II Corps Mike Force, 5th Special Forces Group (Airborne), Pleiku, Vietnam; Assistant Intelligence Officer, Company B, 5th Special Forces Group (Airborne), Pleiku, Vietnam; Commander, Company C, 5th Battalion, 2nd Basic Combat Training Brigade, U.S. Army Training Center, Fort Leonard Wood, Missouri; Executive Officer, 5th Battalion, 2nd Basic Combat Training Brigade, U.S. Army Training Center, Fort Leonard Wood, Missouri; Commander, Company C, 1st Battalion 327 Infantry, 101st Airborne Division, Gia Le, Vietnam; Commander, Headquarters Company 1st Battalion, 327 Infantry, 101st Airborne Division, Gia Le, Vietnam; Senior Army Instructor, Howe Military Academy, Howe, Indiana; Logistics Officer, Special Forces Detachment (Airborne) Europe, Bad Toelz, Germany; Commander, Company A, 1st Battalion, 10th Special Forces Group (Airborne), Bad Toelz, Germany; Senior Operations and Training Advisor, 94th Army Reserve Command, Bedford, Massachusetts; Assistant Senior Army Advisor, 94th Army Reserve Command, Bedford, Massachusetts; Commander, 1st Special Warfare Training Battalion (Airborne) United States Army John F. Kennedy Special Warfare Center, Fort Bragg, North Carolina; Chief Low Intensity Conflict Division, United States Army John F. Kennedy Special Warfare Center, Fort Bragg, North Carolina; Director Special Operations, Advanced Skills Department, United States Army John F. Kennedy Special Warfare Center, Fort Bragg, North Carolina; Deputy Chief Special Projects Branch, Supreme Headquarters Allied Powers Europe, Casteau, Belgium; and Chief Joint Training and Exercise Division, United States Special Operations Command, MacDill Air Force Base, Florida. | Colonel Andrew Lech Irzyk is a graduate of the Basic Airborne Course, Jumpmaster Course, Infantry Officer Advanced Course, Special Forces Qualification Course, Command and General Staff College, Foreign Area Officer Course, United States Army War College. | His military awards include: Legion of Merit, Bronze Star w/ Oak Leaf Cluster, Meritorious Service Medal, Air Medal, Army Commendation Medal w/ Silver Oak Leaf Cluster, Good Conduct Medal, National Defense Service Medal, Vietnam Service Medal w/ Seven Campaign Stars, Humanitarian Service Medal, Armed Forces Expeditionary Service Medal, Republic of Vietnam Campaign Medal, Army Service Ribbon, Overseas Service Ribbon w/ Four Device, Republic of Vietnam gallantry Cross w/ Palm Unit Citation, Republic of Vietnam Civil Action Medal Unit Citation, Combat Infantryman Badge, Master Parachutist Badge, Special Forces Tab, Vietnamese, German and Italian Parachute Badges.