In 1996, Watson joined the World Bank as the Senior Scientific adviser in the Environment Department, became Director of the Environment Department and Head of the Environment Sector Board in 1997 and is currently the Chief Scientist and Senior Adviser for Sustainable Development. He took up a position as Chair of Environmental Science and Science Director of the Tyndall Centre at the University of East Anglia, United Kingdom, in August 2007[6] and joined the British Government's Department for Environment, Food and Rural Affairs (Defra) as Chief Scientific Adviser in September 2007.[7]