- MD, Erasmus University Rotterdam, the Netherlands (1969).
- PhD Thesis on Gestational Diabetes, University of Utrecht, the Netherlands (1980).
- Residency Internal Medicine and Gynaecology/Obstetrics, University Hospital Leiden and University Hospital Utrecht, the Netherlands (1969-1976).
- Fellowship Centre for Research in Reproductive Biology, University of Michigan, Ann Arbor, USA (1974).
- Board Certification Gynaecology/Obstetrics, the Netherlands (1976).
- Head of Obstetrical Department, thereafter Head of Reproductive Endocrinology, Department of Obstetrics/Gynecology, University Hospital Utrecht, the Netherlands (1976-1985).
- Gynaecologist, Juliana Hospital Veenendaal, the Netherlands (1985-1987).
- Global Executive VP of Clinical Development in Reproductive Medicine (RM), Organon, Oss, the Netherlands (1987-1997).
- Global Executive VP RM: responsible for R&D and pipeline in RM, Organon, Oss, the Netherlands (1997-2000).
- Professor Reproductive Medicine, Dutch speaking Free University Brussels (1997-2007).
- Founder of Pantarhei Bioscience on December 28, 2000.
- CEO and President at Pantarhei Bioscience and Pantarhei Oncology (2000-2018).
- President at Pantarhei Bioscience and Pantarhei Oncology (2019-present)