General Surgery (1975-1978)
General Pediatric Surgery (1979-1981)
Cardiothoracic Residency (1982-1985)
Attending Surgeon (1986-1999)
Vice Chief. Department of Cardiac Surgery. (1999 - 2007)
Professor and Chairman. Department of Pediatric and Congenital Heart Surgery. (2007 - )
Congenital Heart Disese in Children and Adults