University of Milano, Italy 1957-1963
Ospedale Niguarda, Milano, Italy 1963-1968
Baylor College of Medicine, Houston, TX , USA 1968-1971
Texas Heart Institute, Houston, TX,, USA 1971-1972
Temple University, Philsdelphia, Penn. USA 1972-1975
Chief, Cardiovascular Surgery, Ospedale S.Carlo, Potenza, Italy 1975-1999
Chief, Dept Cardiac Surgery Policlinico di Monza 1999-
Director, School of Cardiac Surgery "Ettore Majorana Foundation and Centre for Scientific Culture"
President, Denton A. Cooley Cardiovascular Surgical Society (2009-2012)