
- 1979-82: project medewerker Institute of Sonology (Univ of Utrecht)
- 1981-82: assistent researcher, Dept of Philosophy, UvA
- 1996-90: assistent researcher, CWI
- 1990-..: universitair docent, FEW/Informatica/IM&SE, VU
- 1998-2000: senior researcher, CWI (part-time, in exchange with VU)
- dec 2008 - juli 2011 -- (part-time) professor creative technology / new media (UTwente/EWI)