1966-09-01 Starting carreer in Hessische Elektrizitäts?AG, Darmstadt
1975-11-01 Member of the board Hessische Elektrizitäts-AG
1998-03-25 Chief Executive Officer of Hessische Elektrizitäts-AG and HEAG Versorgungs-AG
National and international committees and associations
1973 - 1994 German member in the study committee „Distribution“ at International Union of Producers and Distributors of Electrical Energy (UNIPEDE)
1985 - 1994 Chairman
1982 - 1995 Founder and chairman of the group of experts DISCAB in the study committee "Distribution" of UNIPEDE
1991 - 1997 Member of the Steering Committee 2 der UNIPEDE (Power Supply and Distribution)
1994 - 1997 Chairman
1975 - 1987 German member of CIRED International Conference for the distribution networks
1981 - 1983 President of CIRED
since 1983 German member of International Electro-technical Commission - IEC TC 20 "Cables" und TC 20A "Power Cables"
since 1985 Member of ICC (Insulated Conductors Committee) and Transnational Activities Subcommittee, SC-13 (IEEE)
since 1975 Member of the cable committee of VDEW Chairman since 1984
1979 - 1990 Member of the directing committee of DKE
1979 - 1991 Advisor for generation, transmission and distribution of electrical energy in developing countries (Brazil, Dominican Republic, Ecuador, Israel, Paraguay, Peru, Philippines, Syria, Vietnam) at the Kreditanstalt für Wiederaufbau, Frankfurt am Main (German development bank)
since 89/90 Technical University of Darmstadt Institute for High voltage and measurement engineering Professor for „Energy cabel and installations“
President, organisator and chairman of national and international conferences. (UNIPEDE, Cired, Jicable, VDEW, etc.)
Author of technical books, essais and articles in ETZ, EW, ET, MEDIAWATT etc.
Lectures in Germany and foreign countries, e.g. USA, Paraguay, Mexico, Spain, Austria, France, Great-Britain, Italy, Belgium.