• 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)