Dr. Simon Heller, is professor of clinical diabetes at the University of Sheffield, director of research and development and honorary consultant physician at Sheffield Teaching Hospitals Foundation Trust, in the UK. 

He received his clinical diabetes training at Queen's Medical Centre, Nottingham and his research training at the University of Nottingham and Washington University, St Louis, USA. From 2000-2005 he was editor of Diabetic Medicine. He is currently a member of the Diabetes UK Research Committee and chairs the Clinical Studies Advisory Group of the Diabetes Research Network in the UK.

His current research interests include the physiological responses to hypoglycaemia and hypoglycaemia unawareness, pathophysiological mechanisms of sudden death in Type 1 diabetes and developing interventions to encourage more effective diabetes self-management (including the DAFNE and DESMOND RCTs). He chaired the glucose control group and sat on the steering committee of the ADVANCE trial.