1. Chercheur Institute for Sales and Account Management
2. Professeur émérite et directeur Institute for Sales and Account Management Department of Marketing, School of Economics, Erasmus University Rotterdam
3. Professeur de marketing Dwight F. Benton
4. Maître de conférences en marketing Stephen M. Ross School of Business University of Michigan
5. Radiologue
6. Maître de conférences Department of Radiology, Erasmus MC-University Medical Centre Rotterdam