Senior House Officer -Surgery 1979-1983, Walsall, Newcastlle on Tyne,&Hull, UK
Registrar - Cardiothoracic Surgery 1983-1988, Glasgow, Edinburgh, UK
Fellow - Thoracic Surgery 1986-87, University of Colorado Health Sciences Center & Denver Childrens
Senior Registrar - Cardiothoracic Surgery 1988-1991, St. Marys Hopital, London & Harefield Hospital,
Advanced Fellow -Thoracic Surgery & Thoracic Organ Transplatation, 1991-1993, Mayo Clinic Rochester,
Assistant Professor -Surgery 1994-1998, University of Illinois, Chicago, IL
Associate Professor - Thoracic and Cardiovascular Surgery, Chief of Thoracic Surgery, 1998-2004, Loyola University and Stritch School of Medicine
Professor -Thoracic and Cardiovascular Surgery, Chief of Thoracic surgery and Director of Lung and Heart-lung Transplant, Associate Director of Thoracic Oncology 2004 - 2005, Loyola University Medical Center and Stritch School of Medicine
Professor of Surgery and Associate Chief, Cardiac and Thoracic Surgery. 2005-2015 University of Chicago
Professor of Thoracic and Cardiovascular Surgery, Director of Thoracic Surgery, 20016-todate, Loyola University Health System
Fellow of the Royal College of Surgeon of Edinburgh -Surgery 1983, Cardiothoracic Surgery 1993
Fellow of the Royal College of Physicians and Surgeons of Canada - Cardiothoracic Surgery1993