Wegener joined the Nazi Party in 1930 and the Sturmabteilung (SA) in 1931. He became Kreisleiter for Bremen in 1933 and a delegate to the Reichstag for Weser-Ems that same year.[1] Wegener served as a party bureaucrat employed at the Office of the Deputy Führer where his efficiency impressed Martin Bormann.[2] When Wilhelm Kube was removed as Gauleiter of Gau March of Brandenburg after clashing with Walter Buch, he was replaced by Emil Stürtz with Wegener appointed as deputy Gauleiter.[2]