- Law Studies, Zürich University; 1967 Doctoral Thesis: Raumfahrt und Völkerrecht (Space Flight and International Law); 1968-1971: Expert on space matters, Federal Department of Foreign Affairs, Bern; 1971-1980: Permanent Swiss Delegate to ESRO and ESA, Swiss Embassy, Paris; 1980-1988: Head, Scientific Affairs Section, Federal Department of Foreign Affairs, Bern; 1988-1997: Advisor on European Space Cooperation, Federal Department of Foreign Affairs, Bern; Head of Swiss Delegation to ESA Council; Swiss Delegate to ESO Council; 1998-2002: Head of Swiss Space Office (SSO), Head of Swiss Delegation to ESA Council. - Chairmanship: 1972-1975: Chairman, Administrative and Finance Committee, ESRO; 1974-1975: Chairman, Legal Working Group on ESA Convention, ESC; 1975-1978: Chairman, Industrial Policy Committee, ESA; 1978-1981: Chairman, Ariane Launcher Programme Board, ESA; 1987-1990: Vice-Chairman, ESA Council; 1989-1990: Chairman, Intergovernmental Committee on Renegotiation of the Ariane Series Production Declaration; 1994-1996: President, European Southern Observatory; 1993-2002: Chairman, Long-Term Space Policy Committee, ESA.