Research and development engineer Brown Boveri Cie, Baden, Switzerland, 1959-1963, CONTRAVES, Zuerich, Switzerland, 1963-1964. With European Space Science and Tech.Ctr, Delft/Noordwijk, Netherlands, 1964-1972, test director, launch operations manager, 1968-1972. Study manager space laboratory phase A, European Space Agency, Paris, 1972-1973, mission manager ASSESS 1 and 2, 1973-1976.
Head operations and crew activities European Space Agency-SPICE, Porz-Wahn, West Germany, 1976-1979. Consultant on German spacelab utilization program DFVLR, Porz-Wahn, 1979-1981. Consultant on peaceful uses of outer space to United Nations, New York City, 1981-1982.
With European Space Agency, Office of Director General, Overath, West Germany, 1982, project manager Meteosat Exploitation Project, since 1983.