Cologne Opera
After World War I he became conductor at the Kammerspiele Hamburg, and was répétiteur and later Kapellmeister at the Cologne Opera under Otto Klemperer between 1919 and 1923. In 1923 he became Kapellmeister at the Staatstheater Mainz and from 1925 Principal Kapellmeister at the Städtische Oper Berlin under Bruno Walter.