 Krupinski entered the "Amt Blank" (Blank Agency), named after Theodor Blank, the forerunner of the German Federal Ministry of Defense on 15 December 1952.Given the rank of major in 1957, Krupinski went to lead "Jagdbombergeschwader" 33 (JaBoG 33—Fighter-Bomber Wing 33) the first postwar German jet fighter wing.In 1966 Krupinski took command of the German forces of the "Luftwaffen-Ausbildungs-Kommando" in Fort Bliss, Texas with the rank of brigadier general.