• 1986 – 1998 – Trauma Clinic, Medical School of Hannover (Germany) (Director: Prof. H. Tscherne)
• 1990 – Medical specialist in surgery
• 1991 – Specialist in trauma surgery
• 1993 – Habilitation for the subject „Trauma Surgery“ – Topic: The functional treatment of the fresh Achilles tendon rupture – a clinical and experimental study
• since 1993 Faculty of the Hannover Medical School
• 1993 – Senior physician at the Trauma Surgery Clinic Hanover
• since 1993 Scientific Director of the „Foot Surgery Working Group“ at the Trauma Surgery Clinic of the Hannover Medical School
• 1994 – Additional qualification in emergency medicine
• 1998 – Professorship (associate professor)
• since 1998 – Head physician at the International Center for Orthopedics (former Center for Hip, Knee and Foot Surgery, Sports Traumatology) ATOS Clinic Heidelberg
• since 2010 – Medical Director ATOS Clinic in Heidelberg

• 1998 – Visiting Professor St. Louis, Missouri (USA) (Dr. L.Whiteside)
• 1999 – Visiting Professor Hospital for Special Surgery New York (USA) (Sculco, MD & Laskin, MD)
• 1999 – Invited Speaker and Moderator, 1th Foot & Ankle Course; Hong Kong
• 2000 – Visiting Professor Clinique Le Lilac, Paris (FRA) (Prof. Cartier)
• 2000 – Visiting Professor Ospedaliero Universitaria Florence (ITA) (Prof. Agliette)
• 2001 – Visiting Professor, Hospital for Special Surgery New York City, New York (USA) (Sculco, MD & Laskin, MD)
• 2001 – Visiting Professor Ospedaliero Universitaria, Genua (ITA) (Prof. M. Romagnoli)
• 2002 – Co-Organizer (with Prof. Paessler/ Prof. Habermeyer), 3rd International Orthopaedic Symposium – „Knee and Shoulder“ Heidelberg
• 2002 – Invited Speaker and Chairman: Summer Meeting, American Orthopedic Foot and Ankle Society, Michigan and South Carolina (USA)
• 2002 – Co-Organizer (with Prof. Paessler/ Prof. Habermeyer), 3rd International orthopedic Symposium “Knee and Shoulder” Heidelberg (Germany)
• 2005 – Visiting Professor 3rd Military University Chongqing (China)
• 2007 – Host and Chairman of the “Kenneth A. Johnson“ Symposium, AOFAS Summer Meeting (USA)

• 1989 Member of the German Society for Surgery
• 1990 Member of the German Society for Traumatology
• 1990 Member of the work group “ Sportmedizin (CAS)“ by German Society for Surgery
• 1991 Member of the Society for Orthopaedic and Traumatological Sports Medicine
• 1991 Member of the work group “ Sonography“ by German Society for Surgery
• 1991 Member of the work group „Kallusdistraktion “ by the German section of AO
• 1994 Board Member of the European Society of Foot and Ankle Surgeons
• 1995 Member of the work group „Biomechanics of the Foot and Ankle“ by the American Orthopaedic Foot and Ankle Society
• 1996 President Education Committee European Society of Foot and Ankle Surgeons
• 1997 International Member of the American Orthopaedic Foot and Ankle Society
• 1997 Member of the Management board at the magazine Foot and Ankle Surgery
• 1997 President Education Committee European Society of Foot and Ankle Surgeons
• 1998 Member of the Study Group „Total Joint Replacement“ Germany
• 1998 Editorial Board of „Foot and Ankle Surgery”
• 1998 Board Member of the European Foot and Ankle Society
• 1998 Editorial board of the American journal „Foot and Ankle International“
• 2005 Honorary member of the Brasilian Foot and Ankle Society
• 2006 Consultant Smith & Nephew, Member Pre-user development group: Journey BCS 1 (1st anatomic Total knee replacement), First user in Germany
• 2006 International external adviser (Chinese University Hongkong)
• 2007 Honorary member of Chinese Foot & Ankle Society
• 2007 co-founder of the „Achilles Tendon Study Group“
• 2010 Consultant Smith & Nephew, Member Pre-user development group: Journey DCS 2 (Total knee replacement), First user in Germany
• 2010 Senior consultant Arthrex GmbH
• 2012 Honorary Member Irish Foot and Ankle Society
• 2014 Course leader and Chair: Advanced Techniques Ankle and Achilles tendon repair (Wetlab) Arthrex
• 2018 First user in Germany “Navio- robotic knee system” for Unicompartimental knee replacement Journey Uni
• 2019 Honorary Member Indian Foot and Ankle Society

1985 – Birmingham Accident Hospital Birmingham (GBR) (P.S. London)
1986 – Centre de Traumatologie et D’Orthopedie Strasbourg (FRA) (Prof. I. Kempf)
1987 – Hospitale communale Lecco Callusdistraction in Lecco (ITA) (G.A. Ilizarov, MD, Prof. E. Cattaneo, Prof. M. Catagni)
1991 – University of Pittburgh Mayo-Clinic, Scotsdale, Arizona (USA) and Kaiser Permanente Hospital, San Francisco, California (USA)
1993 – University of Maryland, Baltimore (USA)
1997 – University of Kopenhagen (DNK) (Dr. Kofoed)

• Article: Knee surgery with robotic assistance, Rhein-Neckar-Zeitung from 28 April 2021
• Article: 25th anniversary ATOS Clinic, Rhein-Neckar-Zeitung from 01 July 2016
• Article: Focus Ärzteliste, issue 24/2010 from 14 June 2010
• Article: Special supplement in the Rhein-Neckar-Zeitung from 12 February 2010
• Article: Open Day at the ATOS Clinic, Rhein-Neckar-Zeitung from 15 October 2009
• Article: International ATOS LIVE Summit 2009, Rhein-Neckar-Zeitung from 02 October 2009
• Article: Market launch of ACTIFIT artificial meniscus, Rhein-Neckar-Zeitung, 26 November 2008