| 1986/87 | Postdoctoral position, Massachusetts Institute of Technology, USA
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| 1987-91 | Scientific assistent, University of Kaiserslautern)
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| 1992-95 | Private lecturer, University of Kaiserslautern
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| 1994/95 | Substitute professor for Inorganic Chemistry, University of Würzburg
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| 1995-98 | University lecturer, University of Kaiserslautern
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| since 2002 | Associated Professor, University of Kaiserslautern
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| 06/1999 | Visiting professor, Université de Bourgogne, Dijon
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| SS 2000 | Visiting professor, Seoul National University
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| 07/2002 | Visiting professor, Seoul National University
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| 09/2004 | Visiting professor, Seoul National University
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| 10/2011 | Visiting professor, Al-Farabi Kazakh National University, Almaty
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