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. |