Sébastien Gagneux is Associate Professor of Infection Biology and Head of Department at the Swiss Tropical and Public Health Institute (Swiss TPH)/University of Basel. After receiving his PhD from the University of Basel, he worked as a postdoctoral fellow at Stanford University and at the Institute for Systems Biology in Seattle, USA. He then spent three years as a Program Leader at the MRC National Institute for Medical Research in London, UK before joining Swiss TPH. His research focuses on the ecology and evolution of Mycobacterium tuberculosis, and combines population genomics, molecular epidemiology and experimental approaches to study the effect of bacterial variation on host-pathogen interaction and drug resistance.