Diploma-Ing., Technology University, Darmstadt, Germany, 1961. Doctor of Philosophy, University California-Berkeley, 1967.
Senior technical specialist Northrop Corporation, Hawthorne, California, 1962—1963. Research assistant University California, Berkeley, 1963—1967, assistant & associate professor Santa Barbara, 1967—1972. Project leader Fraunhofer Research Association, Karlsruhe, Germany, 1972—1977.
Research director Internet service provider Institute for Systems Research and Forecasting, Hannover, Germany, 1977—1979. Associate & full professor environmental systems analysis University Kassel, Germany, 1979—1997, director environmental systems analysis group and center environmental systems research Germany, 1979—1997. Research project leader & consultant research foundations, European Union, federal and state government, 1967—2006.
Elected representative and city council member Municipal Government, Zierenberg, Germany, since 2001. Member and advisor Council on Environmental Issues, Protestant Church of Germany, Hannover, 1975—1985. Member National Committee for International Institute for Systems Analysis, Vienna, 1974—1980.
Co-founder, member Institute Ecology, Freiburg, Germany, 1977—2006. Science member Unesco Working Group Global Modelling, Paris, France (including Monaco), 1974—1987, Unesco Working Group Research and Human Needs, Paris, France (including Monaco), 1975—1987. Member board directors Balaton Group (International Network of Resource Information Centers), Durham, New Hampshire, 1981—2001.
Chairman, educational policy committee University California, Santa Barbara, 1969—1972.
Married Rika Gerlind Rueckert, November 3, 1961. Children: Derk, Karen, Kendrik.