| 1994-
| Member, Arbeitsgemeinschaft für Medizinisches Bibliothekswesen (AGMB, German Medical Libraries Association)
|
| 1994-
| Founder and Maintainer, MEDIBIB-L (mailing list for German-speaking medical librarians)
|
| 1994-2001
| Founder and Maintainer, LITI - Literaturliste Internet
|
| 1995-1998
| Co-Founder and Head, Working group “Medical Academic Libraries” of the AGMB
|
| 1996-2001
| Founder and Maintainer, Homepage of the AGMB
|
| 1997-2001
| Founder and Chief Editor, GMS Medizin - Bibliothek - Information (vormals AGMB aktuell bzw. medizin-bibliothek-information)
|
| 1998-
| Senior Lecturer, Medical Faculty University of Münster
|
| 1998-2003
| Deputy Chair, AGMB
|
| 2000-2003
| Project Manager, BMBF-Project LOTSE
|
| 2002-2008
| Member, Advisory Council of DIMDI
|
| 2002-2012
| Member, Advisory Council of the German National Library of Medicine
|
| 2004-
| Founder, medinfo weblog
|
