UNIVERSITY
  • Deputy Executive Dean (Research Centres) Faculty of Medicine and Health University of Sydney (2024 Aug - present)
  • Head, Melbourne School of Population and Global Health, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne (2020 Feb - 2024 Aug)
  • Associate Dean of Academic Affairs, Dalla Lana School of Public Health, University of Toronto, Ontario (2016 Jul – 2020 Jan) 
  • Associate Professor, General Surgery, Surgery, University of Toronto, Ontario (2008 Jun - 2015 Jun)
  • Associate Professor, Health Policy, Management and Evaluation, Faculty of Medicine, University of Toronto, Ontario (2008 Jun - 2015 Jun) 
  • Assistant Professor, Health Policy, Management and Evaluation, Faculty of Medicine, University of Toronto, Toronto, Ontario (2006 Jan - 2008 May) 
  • Assistant Professor, Surgery, University of Toronto, Ontario (2005 Dec - 2008 May)
  •  Assistant Professor, Surgery, University of Minnesota, Minneapolis, Minnesota (2002 Jan - 2005 Dec)
RESEARCH
  • Provincial Clinical GI Endoscopy Lead, Cancer Care Ontario, Toronto, Ontario (2014 Sep – 2020 Jan) 
  • Adjunct Scientist, Cancer Theme Group, Institute for Clinical Evaluative Sciences, Toronto, Ontario (2006 Jan - 2015 Mar) 
  • Scientist, Li Ka Shing Knowledge Institution, St. Michael’s Hospital, Toronto, Ontario (2006 Jan - 2020 Jan)
  • Research Assistant, Nuclear Medicine, St. Michael’s Hospital, Toronto, Ontario (1987 Jun - 1989 Jun) 
  • Research Assistant, Biology, McMaster University, Hamilton, Ontario (1986 May - 1986 Sep) ​
HOSPITAL
  • Staff Surgeon, Division of General Surgery, St. Michael’s Hospital, Toronto, Ontario (2006 Jan - 2020 Jan) 
  • Chief, General Surgery, Department of Surgery, St. Michael’s Hospital, Toronto, Ontario (2013 May – 2019 Aug)
  • Acting Chief, General Surgery, Surgery, St. Michael’s Hospital, Toronto, Ontario (2012 Apr - 2013 Apr) 
  • Colorectal Surgeon, Surgery, University of Minneapolis Fairview Hospital, Minneapolis, Minnesota, United States 2002 Jan - 2005 Nov 9)
  •  Clinical Associate, Cardiac Surgery, Surgery, St. Michael’s Hospital, Toronto, Ontario (1999 Sep - 2000 Apr)
  •  Temporary General Surgery Attending, Women’s College Hospital, Toronto, Ontario (1999 Jul - 2000 Jun)
  • Courtesy Staff, The Riverdale Hospital, Toronto, Ontario (1993 Jul - 2000 Jul)