Roy founded the Health Division of the BBC World Service Trust in 1997, bringing together the BBC and the World Health Organization. For 8 years, he oversaw many of the world’s largest health promotion campaigns, including a campaign in India which led to 200,000 people being treated for leprosy. In 2005, he received the Joseph Rowntree Charitable Trust ‘Visionaries’ Award and left the BBC to set up DMI, aiming to bring greater scientific rigour to health campaigning.
Roy started his career as a documentary film director for the BBC, before joining UN Peacekeeping. There, he set up the UN's first radio station (in Cambodia) and its largest TV operation (during the Bosnian war). He has a double first from Cambridge University and Masters from U.Penn.