Assistant Professor in Public Health (Social Medicine & Health Management), Trakia University, Bulgaria (1991-1996)

Assistant Professor in Public Health (Social Medicine & Health Management), Medical University - Plovdiv, Bulgaria (1996-2005)

Senior Scientist in Biostatistics & Clinical Epidemiology, Mario Negri Institute for Pharmacological Research, Italy (2000-2008)

Senior Health Outcomes Manager, IMS Health, London (2008)

Senior Research Fellow (Research Methodology) & Programme Manager, Royal College of Surgeons in Ireland (2008-2012)

Senior Lecturer in Medical Statistics, University of Southampton (2012-2014)

Associate Professor in Medical Statistics, University of Southampton (2014-2017)