From 03/2006 to 05/2007 he was a Post-Doctoral Research Fellow in Eric Yu's group at the Department of Computer Science at University of Toronto, which was funded by an FWF Erwin Schroedinger Postdoctoral Fellowship. From 08/2009 to 09/2009 he was a visiting scientist at the Palo Alto Research Center (formerly XEROX PARC). He is principal investigator of the 2.5 years basic research project "TransAgere" that focuses on the role of (human) agents and goals on the social web (2007-2010). His research interests include web research, knowledge management and intentional knowledge bases.