| 1988 – 2012 | Project Manager, Managing Director, Member of the Board
Walter Mäder AG, Switzerland Killwangen Mäder Aqualack AG, Hamm Mäder Groupe, Lille France |
| 1986 – 1987 | Head of Laboratory, R & D department
Streit AG, Switzerland Frauenfeld |
| 1985 – 1986 | Head of Laboratory; Application technical department
Bayer AG, Krefeld Uerdingen |
| 1984 – 1985 | Lab manager, paint chemist
BASF Farben + Fasern AG, Würzburg |
| 1981 – 1984 | Lab manager, paint chemist
BASF Farben + Fasern AG, Münster |
| 1979 – 1981 | Study of paint chemistry |
| 1976 – 1979 | Paint production
Herberts GmbH, Wuppertal |