Current Position: President of the GESIS- Leibniz Institute for the Social Sciences; Full Professor at the Faculty of Computer Science at the University of Koblenz-Landau.
Past Positions: Assistent Professor; University of Karlsruhe; Visiting Professor, Stanford University, University of Mannheim; Senior Researcher, SAP; Academic Director, Department for Informational Processes in the Social Sciences, GESIS.
Other positions: As a Co-PC Chair; Semantic Web Track; Organization of the 19th International World Wide Web Conference (WWW2010); As the Head of Program, Organization of the 3rd European Semantic Web Conference (ESWC2006).
Main Areas of Research: Semantic Web, Knowledge Management and Internet Services.
