 He worked at the saving and loans bank in Hohenhausen as an employee from Easter 1938 until November 1938.In the summer of 1939, Crinus served in the compulsory labour service ("Reichsarbeitsdienst"), working in an construction unit on the "Westwall", a fortified defensive line on the Germanys western border.In January 1940, Crinius joined the Luftwaffe and was trained as a pilot.