RWTH Aachen, (B.Messmer) ; 1997-1999
Ludwig Maximilians University Munich Grosshadern (B.Reichart); 2000-2004
Friedrich Schiller University Jena (Th.Wahlers); 2004-2005
Cologne Heart Center (Th.Wahlers); 2005-2007
Clemenshospital Muenster (R.Bieselt); 2008-2021
Klinikum Lippe-Lemgo, since 2022
General Thoracic Surgery: Oncologic Surgery
Heart Failure Surgery
Heart&Lung Transplantation