 Until 1941 he was responsible for the vocational training schools of the Reichsvereinigung der Juden in Deutschland and adviser on the training relating to crafts of Jewish Germans.From September 1941 Wollheim worked at a transportation equipment factory in Lichtenberg, Berlin.On March 8, 1943 Wollheim with his sister Ruth Wollheim (born in 1910), his wife Rosa (née Mandelbrod, born in 1912) and their son Peter Uriel (born in 1939) were arrested by the Gestapo and brought to the gathering point for Jews in the in Berlin, Germany.