| 1999 | Associate Professor of Internal Medicine |
| 1998 -2007 | Lecturer, School for Medical Technicians, General Hospital Graz |
| 1995 -2007 | Lecturer and since 2000 director, School for Dietitians, General Hospital Graz |
| 1991 -1999 | Permantly appointed as a resident of the Department of Internal Medicine, Medical University Graz |
| 1989 -2007 | Lecturer, School for Radiological Technicians, General Hospital Graz |
| 1987 -1991 | Lecturer and Instructor, Institute of Pathology, Karl-Franzens University Graz |
| 1986 -1991 | Permanently appointed as a resident of the Institute of Pathology, Karl-Franzens University Graz |
| 1981 -1986 | Research associate at the Institute of Pathology, Karl-Franzens University, Laboratory for Immunocytochemistry and Molecular Pathology |
| 2006 -2008 | Wiss. Ges. der Ärzte in der Steiermark Sekretär |
| 2006 -2007 | American Association for Clinical Chemistry Member of the education committee |
| 2003 -2007 | ÖGUM (Österreichische Ges. für Ultraschall in der Medizin) Mitglied |
| 1999 -2007 | Bund deutscher Internisten Mitglied |
| 1999 -2007 | American Society of Nephrology korrespondierendes Mitglied |
| 1999 -2007 | Bund deutscher Internisten Mitglied |
| 1997 -2007 | European Dialysis and Transplantation Association (EDTA-ERA) Mitglied |
| 1988 -2007 | Österreichische Gesellschaft für Pathologie Mitglied |
| 2002 -2005 | Österreichischen Gesellschaft für Transplantation, Transfusion und Genetik
Sekretär |
| 2005 -2007 | TRANSPLANT INTERNATIONAL |
| 1997 | Austrotransplant-Kongress in Saalfelden/Salzburg Mitglied Organisationskomitee |
| 1993 | 2nd Austrian-Hungarian Nephrology Joint Meeting Mitglied Organisationskomitee |
| 1992 | International Workshop on Modern Analytical Methods in Histochemistry
Mitglied Organisationskomitee |
| 1988 | International Workshop Neural and Endocrine Markers as Diagnostic Tools
Mitglied Organisationskomitee |
| 1988 | The Applied Cyto Sciences ... An International Perspective Mitglied Organisationskomitee |
| 1987 | International Workshop on In-Situ Hybridisation Mitglied Organisationskomitee |