Formerly: Fellow and Deputy Director, Institute of Development Studies, University of Sussex; several senior development positions, World Bank, latterly as Vice-President, Concessional Finance and Global Partnerships. 2006, joined Bill & Melinda Gates Foundation; has held various positions, including President, Global Policy & Advocacy; currently, Chief Economic and Policy Adviser to the Co-Chairs and CEO; supports replenishment negotiations, interactions with high-level policy bodies (such as the G20 and the OECD) and relationship-building with economic leaders in developing countries.