| 1966 | Bachelor's degree (kandidaatsexamen) in Mathematics & Physics with Astronomy, University of Amsterdam. |
| 1970 | Master's degree (doctoraalexamen) in Pure Mathematics (cum laude), University of Amsterdam. |
| 1975 | Doctor's degree in Pure Mathematics, University of Amsterdam. Thesis title: Elliptic curves defined over imaginary quadratic number fields. A diophantine approach. Thesis supervisor: Prof. dr F. Oort. Much of the research done for this dissertation took place during my stay at the Mathematical Institute of Oxford University (UK) in 1969. |
| 1966 - 1971 | Lecturer of Pure Mathematics, Department of Mathematics, The University of Manchester, Manchester, UK |
| 1969 (Spring and Summer) | Visitor of the Mathematical Institute of Oxford University (UK) as PhD student of Prof. B.J. Birch, MA, PhD, FRS |
| 1971 - 1975 | Assistant Professor of Mathematics, Econometric Institute, Erasmus University Rotterdam, NL |
| 1975 - 2005 | Associate Professor of Mathematics, Econometric Institute, Erasmus University Rotterdam, NL |
| 2005 - present | Emeritus Associate Professor of Mathematics, Econometric Institute, Erasmus University Rotterdam, NL |
| 1987 (Summer) | Visiting Professor of Mathematics & Computer Studies, Department of Mathematics, Webster University, St. Louis, Missouri, USA |
| 1984 - present | Adjunct Professor of Mathematics and Computer Science, Webster University, Leiden campus, Leiden, NL |
| 1996 | Umbra Erasmi penning (medal), Erasmus University. |
| 2004 | Certificate of Appreciation for 20 years of dedicated and successful teaching, Webster University. |
| 2005 | Koninklijke onderscheiding (Queen's Honours for Service to Mathematics): Ridder in de Orde van Oranje-Nassau. |
