Desmond Leddin MB, MSc, FRCPC, FRCPI graduated from Trinity College Dublin. 

He completed postgraduate training in Internal Medicine and Gastroenterology at Queens University, Ontario and at the University of Toronto before completing a Masters in Physiology at Queens on intestinal inflammation.

He has chaired the Royal College of Canada examination board in Gastroenterology, the Canadian Association of Gastroenterology education committee, has been director of training canters and research committe chair for the World Gastroenterology Organisation.He is a past President of the Canadian Association of Gastroenterology.

Research interests are inflammatory bowel disease, colon cancer screening, Gastroenterology practice in lower income countries, medical education, and climate change. 

He wrote the first review on the implications of climate change for digestive health and most recently has published a study of global GI leadership and the climate crisis. 

He is currently Professor of Medicine at Dalhousie University, Canada and the University of Limerick in Ireland.