 After World War II, Wilhelm Crinius worked in private industry, serving as a director in the German branch of the Dutch Philips GmbH.He was appointed chairman of the board of directors of the "Ernst Düllmann GmbH" in 1971.On 18 June 1989, as a pensioner, Crinius ran for the European Parliament in Hesse as candidate for the right-wing German People's Union ("Deutsche Volksunion").