Marion Campbell is Professor of Health Services Research in the Health Services Research Unit (HSRU) at the University of Aberdeen, and also Vice Principal (Research). Marion is a medical statistician and clinical trialist. Her main research interests are in the design, conduct and analysis of clinical trials especially complex trial design and the design and conduct of trials in surgery and critical care. She has published widely on clinical trials methodology including on cluster randomised trials, design of trials of non-pharmacological interventions, pragmatic trials and trials reporting. She has served on many national and international funding agencies and committees and is an elected Fellow of the Royal Society of Edinburgh, the Faculty of Public Health and the International Society for Clinical Trials.