Univ. Hospital, RWTH Aachen, (1992 - 1997)
Univ. Hospital of Alexandroupolis, (1998 - 2012)
Asc. Prof. of Cardiothoracic Surgery, DUTH, (2008)
Professor of Cardiothoracic Surgery, DUTH, (2015)
Senior Consultant (Leiter), Department Thoracic Surgery, Clinic of Cardiothoracic Surgery - Klinikum-Fulda (2012 -2020)
Consultant, Department Thoracic Surgery, Clinic of Cardiothoracic Surgery, Uni-Hospital Würzburg (2021-)
Visiting Research Associate, Uni. Goettingen, (2006 -2017)
Resid. General Surgery, Athens, (1984-1987)
Resid. Cardiothorac. Surg. Thessaloniki, (1988 - 1991)
Greek Board: Cardiothoracic Surgery, (1992)
German Board: Thoracic Surgery, (2006)