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    • since 2013 Honorary Professor at the University of Waikato Management School, Hamilton, New Zealand
    • Fellow of the German Computer Science Society (Gesellschaft für Informatik e.V.), Bonn
    • University contact person of the German Computer Science Society (GI) as well as speaker of the local GI chapter
    • Member of the Editorial Review Board of the International Journal of Information System Modeling and Design (IJISMD)  (more)
    • Since I have visited the Department of Information Management at the National Chung Cheng University in Chia-Yi, Taiwan twice, I am a visiting professor there.  (more)
    • My Erdös number is 3, and I am a JP-2 (explanation provided upon request only).  (more)



    • Area Editor for "Transaction Management" for 1st and 2nd edition of Springer's Encyclopedia of Database Systems (which in total consists of 1,256 entries or 3,067 including synonyms that were written by 871 authors and which will be 4,100 pages published in five volumes, and which is finally out)  (more)
    • Dean (Vice-Dean) of the Muenster School of Business Administration and Economics, Academic Year 2004/5 (2005/6), resp.  (more)