Partner Otto Wolff, Cologne, 1940-1966. Chairman, board management Otto Wolff AG, 1966-1986, chairman supervisory board, 1986-1990. Board directors The Germany Fund, Incorporated, New York York, Alusingen GmbH, Singen.
Chairman Association German Chambers of Commerce and Industry, Bonn, 1969-1988, Cologne Chamber of Commerce and Industry, 1987-1990, German East-West Trade Committee, since 1956. Chairman Advisory council Deutsche Bank AG, Frankfurt, 1976-1988. Advisory council United Technologies, Hartford, Connecticut, since 1983, Creditanstalt Bankverein, Austria, since 1983, Allianz Versicherungs AG, Munich, since 1980, International Business Machines Corporation Europe S.A., Paris, 1974-1988.