Positions

• Associate Editor, Communications of the ACM
• Member of Editorial Boards of "The International Journal of Electronic Markets", "Journal of Information Technology and Tourism", and "Infomation Systems and e-Business Management", all published by Springer - until 2020
• Editor of the Special Issue on Recommender Systems in the Journal International Journal of Electronic Commerce, together with Francesco Ricci
• Visiting Professor, University of Surrey, 2003 - 2010
• Chairman des ICMB (International Conference on Mobile Business) Standing Committee - until 2004
• Program chair of ECSS 2015 - European Computer Science Summit
• Conference Co-Chair of ACM Recsys 2015, Vienna
• Member of Recsys Steering Committee
• Program chair and Program Committee member of over 90 conferences

Member in Societies

• ACM
• Association for Information Systems
• IEEE
• IFITT
• OCG
• ÖGAI

last change 04/06/2020