Academic Education:
- 1983 – 1986 Karlsruhe Institute of Technology (Technical University), GermanyFaculty of Chemistry / cand.chem.
- 1986 – 1991 Ruprecht-Karls University Heidelberg, GermanyFaculty of Chemistry / Dipl.chem. / Thesis in Inorganic Chemistry
- 1991 – 1995 Ruprecht-Karls University Heidelberg, GermanyMedical Faculty / Dr. sc. hum. (Human Sciences) / Ph.D. Thesis in Environmental Chemistry(1995)
- 1991 – 1996 HBK Saar (University of Fine Arts Saar) Saarbrücken, Germany
- Fine Art Program / Diplom in Fine Art (New Artistic Media) / Thesis: Internet Art Installation(1996)
Professional Career:
- 1993 – 1998 Editor of „TightRope“ – Journal for Art, Science and Philosophy. A publication of the Internet research project at the HBK Saar (University of Fine Arts Saar).
- 1998 – 1999 Stipend of the Akademie der Künste Berlin (Academy of Art Berlin, Germany)
- From 1994 – 2001 Prof. Geelhaar exhibited his artworks in national and international exhibitions. Different catalogues with his work were published. In 1994 he won the first pricein the international art competition “AEG-Kunstpreis: Ökologie”.
- Since 1999 Professor for Interface Design, Member of the Departments of Media and Architecture, Bauhaus-Universität Weimar,Germany
- 2007 – 2012 Guest Professor, Tongji-University, Shanghai, P.R. ChinaSince
- 2004 Vice Speaker of the Knowledge Media Design Group of the GI (GermanComputer Science Associaton)
- Since 2009 Speaker of the Tangible Media Group of the GI (German Computer Science Associaton)