During 1939–41 he worked for Austrian automobile factory Steyr, subsequently moving to Daimler-Benz in Stuttgart constructing turbine engines there between 1941 and 1945.
Během let 1939–1941 pracoval pro rakouskou automobilku Steyr-Daimler-Puch, potom pro Daimler-Benz ve Stuttgartu, kde v letech 1941–1945 navrhoval turbínové motory.