536th Ordnance (Heavy Maintainance,Tank) Co.
His Military Occupational Specialty (MOS), "Artillery Mechanic, Light" indicates he worked on guns, probably tank guns. Almost certainly a tank crew member also. Could have belonged to one of hundreds of tank battalions that saw service in the European-African-Middle Eastern Theater of Operations. You can use his name and service number to order a Statement of Service. See Message #5192 for address.