| 2001 - | Faculty member, Dept. of Chemistry, University of Waterloo |
| 2000-2001 | Research Scientist, Dept. of Medical Biochemistry & Genetics, Texas A&M University, College Station (TX) |
| 1995-2000 | C1 (corresponding to assistant professor), Institute of Medical Microbiology and Hygiene, University of Mainz, Germany |
| 1991-1995 | Postdoctoral Scientist, Institute of Medical Microbiology and Hygiene, University of Mainz, Germany |
| 1990-1991 | Visiting Scientist, Institut Pasteur, Paris, France |
| 1988-1989 | Military service, German Army |
| 1987-1988 | Working toward MD thesis, Institute of Microbiology and Molecular Biology, University of Giessen, Germany |
| 1980-1987 | Medical School, University of Giessen , Germany |
| 1980 | graduated from the Johanneum Lueneburg, Germany |