Full Professor, Chair of Information Systems and Services, Bamberg University

Professor of Information Systems Management, University of Bamberg

Wageningen University

Neu-Ulm University of Applied Sciences

HU University of Applied Sciences / Open University of the Netherlands

Stockholm University, Department of Computer an Systems Sciences

Darmstadt University of Technology

Universitat Politècnica de València (https://ror.org/01460j859)

University of Hamburg

Professor (Assistant), Open University of the Netherlands