Diplom-physiker, University Rheinisch-Westfälische Technische Hochschule Aachen.
Member UA1 Group European Organization of Nuclear Research, Geneva, Switzerland, 1978-1983. Founder, owner Engineering Consultancy, 1983-1991. Teacher Polytechnic of Aachen, Germany, since 1985.
1st director president's office, head Wuppertal (Germany) Institute Climate, Environment and Energy, 1991-2000. Founder, owner Sustainable Solutions and Innovations Consultancy, since 2000. Vice president Eurosolar, since 2000.
Member Conseil Solaire Europeen, since 1993. Member European Board Eurosolar, since 1994. Member round table for renewable energies Ministry of Economy, North-Rhine-Westfalia, since 1994.
Member European board European Business Council Sustainable Energy Future, 1996-2000. Advisor in field.