• Locum Tenens-Tawa, New Zealand, General Practice, October 1971-January 1972
• Emergency Physician-Hôpital Nôtre Dame, Montreal, July 1973-October 1973
• Physician Replacement-Vancouver B.C., October 1973-February 1974
• General Practice-CARE, Choluteca, Honduras, April 1974-October 1974
• General Practice-Rural Hospital, Coina, Peru, November 1974 (1 month)
• General Practice-Povugngituk, Nouveau-Quebec, July 1975-July 1976
• Camp doctor-Camp Lenox, Massachusetts, July-August 1981
• Principal Specialist-Pediatrics, Umtata Hospital, Umtata Transkei (Southern Africa), October 1981-April 1983
• Acting Director, Emergency Services, Hospital for Sick Children, Toronto July 1, 1988-April 17, 1989
• Assistant Director, Emergency Services, Hospital for Sick Children, Toronto, April 17, 1989-October 2, 1989
• Staff supervisor, Emergency Department, Hospital for Sick Children, Toronto, July 1983-September 1990
• Acting Chief, Department of Pediatrics, Doctors Hospital, January 1, 1992-June 1, 1992
• Director, Breastfeeding Clinic, Hospital for Sick Children, Toronto, October 1984-March 1996