He has been head of the media and technology program of De Balie, Centre for Culture and Politics in Amsterdam since 1999. He taught theory of interactive media and technological culture for a variety of academic institutions, including the University of Amsterdam, the University of Professional Education of Amsterdam, Academy Minerva Postgraduate Studies in Groningen, and he was a scientific staff member of the Academy of Media Arts Cologne. Recent publications include The Book of Imaginary Media (2006), Delusive Spaces (2008) and the theme issues of Open, Journal for Art and the Public Domain, “Hybrid Space” (2006), and “(Im)Mobility” (2011).

Next to an extensive series of festivals and public events he was project leader for the practice based research trajectory “The Living Archive” at De Balie (2004 – 2010) and currently is Editor in Chief of the Tactical Media Files, an on-line documentation resource for Tactical Media practices worldwide.