Desmond Leddin MB, MSc, FRCPC, FRCPI graduated from Trinity College Dublin. He completed postgraduate training in Internal Medicine and Gastroenterology at Queens University, Canada 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, and been director of education for the World Gastroenterology Organisation training centres. He was head of the Dalhousie University Division of Gastroenterology and district clinical head for Medicine. He is a past President of the Canadian Association of Gastroenterology and former interim head of the medical school at University of Limerick. Research interests are inflammatory bowel disease, colon cancer screening, and climate change. He is chair of the World Gastroenterology Research committee and co-chair of the WGO climate action Group. He is currently Professor of Medicine at Dalhousie University, Canada and adjunct professor at University of Limerick in Ireland