Thoraxclinic Heidelberg, Thoracic Surgery Residency, 1988-1991
University Clinic Mannheim, General Surgery Residency, 1991-1993
University Clinic Dresden, Thoracic and Vascular Residency, 1993-1998
University Clinic Freiburg, Consultant Thoracic Surgery, 1999 - 2004
Lungenklinik, Hospital of Cologne, Chief of Department, since 2005
Trachea transplantation
Perioperative morbidity in General Thoracic Surgery
Quality management
Technical aspects of surgery of the tracheobronchial tree