2003 – present Technische Universität Darmstadt, Darmstadt, Germany Professor for Botany, Applied Plant Science. C4 position.
1996 – 2003 University of Würzburg, Würzburg, Germany Professor for Molecular Plant Physiology. Julius-von-Sachs-Institut für Biowissenschaften
1991 – 1996 University of Hannover, Hannover, Germany Assistant Professor
1989 – 1991 Max-Planck-Institute for Molecular Genetics, Berlin, Germany. Fellowship
1986 – 1989 University of Hannover, Hannover, Germany. PhD student.
1981 – 1986 University of Hannover, Hannover, Germany. Study of Biology. Temporary Employment Abroad
1995 – 1995 Osaka City University, Osaka, Japan. Fellowship of Yamada Science Foundation.
1994 - 1994 The Ohio State University, Columbus, USA. Guest scientist.

Honors and Awards
1980 Science award of the City of Hannover