| 1982-1988 | Studied general electrical engineering, Wuppertal, Germany |
| 1989-1995 | Research Assistant, Bergische Universität Wuppertal, Germany |
| 1994 | Doctorate in electrical engineering, Bergische Universität Wuppertal, Germany |
| 1995-1996 | Head, Control Center, Energieversorgung Offenbach AG, Offenbach, Germany |
| 1996-1998 | Head, Technical Planning Department, Energieversorgung Offenbach AG, Offenbach, Germany |
| 1998 | SVP Energy Technology, Elektrizitätswerk Wesertal GmbH, Hameln, Germany |
| 1998-2000 | Managing Director, Elektrizitätswerk Wesertal GmbH, Hameln, Germany |
| 2000-2001 | Chairman, Elektrizitätswerk Wesertal GmbH, Hameln, Germany |
| 2001-2003 | Member, Board of Management, E.ON Avacon AG, Helmstedt, Germany |
| 2003-2006 | Chairman, Board of Management, E.ON Avacon AG, Helmstedt, Germany |
| 2006-2007 | Member, Board of Management, E.ON Energie AG, Munich, Germany |
| 2007-2010 | Chairman, Board of Management, E.ON Energie AG, Munich, Germany |
| since 2008 | Honorary Professor, Technische Universität Clausthal, Germany |
| since 2010 | Member, Board of Management E.ON AG, Düsseldorf, Germany |
