Scientist at the Institute of Toxicology and Pharmacology of the University of Marburg, Germany
1980 - 1985
Scientist at the German Cancer Research Center in Heidelberg, Germany
1985 - 1986
Senior Toxicologist in the Department of Agrochemical Toxicology of Sandoz Ltd in Muttenz, Switzerland
1986 - 1992
Head of the General Toxicology Department and Member of the Directorate at RCC, Research and Consulting Company Ltd in Itingen, Switzerland
1992 - present
Independent Consultant in Toxicology in Pratteln, Switzerland (1992 - 1998) and Sissach, Switzerland (1998-2002), now based in Zutphen, the Netherlands
