· Full Professor in Multimedia Information Analysis, University of Amsterdam1994–
· Professor, University of Amsterdam1994–1989
· Associate Professor, University of Amsterdam1989–1995
· Full Professor in Biological Image Processing, University of Amsterdam1989–1995
· Associate Professor of Medical Informatics, Erasmus University Rotterdam1984–1989
· Associated Professor in Medical Image Analysis, Vrije Universiteit Amsterdam1984–1989
· PhD Student, Leiden University1981–1983
· M.Sc., Delft Technical University1977–