Diane received her medical degree at Queen's University in Kingston, Ontario.  She trained in Paediatrics and Paediatric Endocrinology at The Hospital for Sick Children, Toronto and did a research fellowship in the immunology of type 1 diabetes at Stanford University. She is currently a Staff Physician in the Division of Endocrinology, Department of Paediatrics, Associate Professor at the University of Toronto and Program Director, Paediatric Endocrinology Training Program at The Hospital for Sick Children. She is the Canadian Centre Director for Type 1 Diabetes TrialNet.