- German Association of Internal Medicine
- German Association of Cardiology
- Professional Union of German Internists
- International Union of Angiology
- American College of Angiology
- Polish Association of Angiology (Honorary member)
- German Association of Hemorheology
- German Association of Gerontology
- German Association of Geriatry
- German Association of Sports Medicine
- New York Academy of Sciences
- Society for Vascular Medicine and Biology (SVMB, USA)
- Professional Union of Phlebology
- Member of the Editorial Board of Critical Ischaemia
- Member of the Editorial Board of Vascular Medicine
- Member of the Editorial Board of Quality Maganegement in the Clinic
- Investigator of several national and international studies
