Osman A Dar is a fellow of the Royal College of Physicians (Edinburgh) and a fellow of the Faculty of Public Health (UK).At Chatham House, he is director of the Global Health Programme’s One Health project, an umbrella term referring to the programme’s work on zoonotic diseases, emerging infections, ecological approaches to disease control, antimicrobial resistance, and food security. In his role at the UK Health Security Agency (UKHSA), Osman is a medical consultant in global public health where he works to support capacity-building initiatives under the International Health Regulations and in the design and implementation of broader Health System Strengthening programmes.Internationally, Osman is a working group co-chair for the One Health High Level Expert Panel (OHHLEP) advising WHO, OIE, FAO and UNEP on their global One Health focused strategies and activities. He currently also serves on the independent Technical Advisory Panel for the World Bank Pandemic Fund.