Universität Bremen, January 2004 - present.

Privatdozent (Assistant Professor) in the Department of Computer Science and Center for Computing Technologies. Research on knowledge representation and reasoning for autonomous agents and semantic web.

Universität Bremen, November 1998 - December 2003.

Assistant Professor in the Department of Computer Science and Center for Computing Technologies. Research on knowledge representation and reasoning for autonomous agents and semantic web.

Universität Bremen, July 1997 - October 1998.

Managing Director of the area ’Intelligent Systems’ at the Center for Computing Technologies. Management and budgeting of a group of 15 researchers.

Queensland University of Technology, July 1996 - July 1997.

Post-Doctoral Fellow at the Neurocomputing Research Centre, School of Computer Science. Research on knowledge-based systems and artificial neural networks. Application domain: agriculture and horticulture.

Queensland University of Technology, January 1996 - June 1996.

Visiting Researcher (Scholarship from German Ministry for Science and Education (BMBF)) at the Neurocomputing Research Centre, School of Computer Science. Research on knowledge-based systems and artificial neural networks. Application domain: agriculture and horticulture.

Universität Münster, January 1991 - December 1995.

Senior researcher at the Institute for Agricultural Informatics (associated with Uni Münster, founded in 01/91). Research on expert systems and artificial neural networks. Software development for a plant protection expert system. Application domain: agriculture.

Universität Münster, July 1989 - December 1990.

Junior researcher within the working group ’Agricultural Informatics’. Research on expert systems and artificial neural networks. Software development for a plant protection expert system. Application domain: agriculture.