2011
* Lecture at St Lucas Academy, Gent. Curated by Esther Venrooy.
2010
* curation of ‘Panels. An inquiry into the spatial, the sonic and the public’. With Karin Bijsterveld, Eran Sachs, Emre Erkal, Wim Langenhoff, Brandon Labelle, Raviv Ganchrow, Basak Senova, Justin Bennett, Esther Venrooy, Kees Tazelaar, Janek Schaefer and Armeno Alberts. At NAiM/Bureau Europa, Maastricht
* lecture at ‘For Real’, ABK Maastricht
* lecture at ‘Watt’, CBK Den Bosch.
* lecture at the academy of Copenhagen: Masters of Architecture.
* workshop at the Fachhochschule Salzburg. Masters of mediadesign.
* forum at the CBK Dordrecht. Organisation by Ina Boiten. Lecture: “De Stad, De Tempel en De Zaal”
2009
* STRP festival, forum about the ‘Poème Electronique’, Eindhoven.
* founded: KENDO BAHN ORCHESTRA. With drummer Roy Moonen.
2006 - 2009
* Researcher / advisor lectorship “autonomy and the public sphere” Zuyd University, Maastricht, lector: Peter Peters (before: Chiel Kattenbelt, Maarten Doorman.)
2008
* ”Het Sprekende Gebouw” article Ex Animo, Academy for fine Arts, Maastricht.
* “Een geluidskunstmuseum” article in national newspaper NRC Handelsblad. Co-written by Peter Peters.
* “Radio MOAB” for Radio Zero, Lisbon, curated by Paolo Raposo.
* 230 volt, Concertzender, Amsterdam and internet. Curated by Hessel Veldman
* Soundtrack to Roy Villevoyes video “Dead, Dead, Dance”, Museum Boymans van Beuningen.
2007
* “Kijken naar geluid” (watching sound) video- and soundwork-curation “Sonic Screen””. Lumière Cinema Maastricht. 
* Lecture “Soundsouvenirs”, University Maastricht.
2006
* “Something about Wapke” soundtrack to a video by Anne Lise Stenseth, RAM Galeriet, Oslo, Sørlandets Kunstmuseum Kristiansand (NO).
2005
* “You Don’t Love Me Yet” project Johanna Billing. Soundpiece with Ramzy Oulad (MC Ramses). Performance Veenfabriek, Leiden (NL).
2004
* lecture “Atelier Nord” Oslo.
* lecture Northwestern University, music department, Chicago, Ill.
* soundtrack to video “Winner” Marianne Heier, Sørlandets Art Museum, Kristiansand.
2002/2003
* two soundtracks to stopmotion movies Manon Bovenkerk.
2002
* ”Soundlab” artstudents ABK Maastricht working in public on soundart at Museum Het Domein, Sittard with lectures of Natasa Petersin, Jay Allen Yim and Marlena Novak, Jens Brand, Guy van Belle.
* "Leefbaar Hedah" workshop with artstudents ABK Maastricht at the Hedah foundation.
2001
* Advisor / teacher at the ABK Maastricht (Akademy for fine arts) up to now.
* Committeemember of the foundation for Fine Art, Design and Architecture –fonds BKVB, Amsterdam.
* Lecture "Cafe Sonore" CEM foundation Amsterdam.
* Lecture "Cafe Sonore", CEM. Location: Den Bosch.
* "H5" book and cd-rom release by Hedah. Cooperation in concept and design.
2000
* Design cd rom "Parkstad prijs 2000" in cooperation with Bert van den Bosch.
1999
* Lecture and workshop ABK Maastricht.
1996
* Lecture ABK Maastricht.
1995
* co-foundation and co-programming Hedah foundation. Up to 1998.
1994
* Lecture at the Ecole des Beaux Arts, Grenoble.
1993
* Lecture at the AKI, Fine Arts Academy, Enschede.

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grijs