Dimitri Zenghelis is joint-head of climate policy at the Grantham Research Institute on Climate Change and the Environment, London School of Economics (LSE). In 2014, he was the acting chief economist for the Global Commission on the Economy and Climate. He was recently senior economic advisor to Cisco’s long term innovation group and an associate fellow at the Royal Institute of International Affairs, Chatham House. Previously, he headed the Stern Review team at the Office of Climate Change, London, and was a senior economist working with Lord Stern on the Stern Review on the Economics of Climate Change, commissioned by then-Chancellor Gordon Brown. Before working on climate change, Dimitri was head of economic forecasting at HM Treasury, where he provided regular briefings to Chancellor Brown and Prime Minister Tony Blair. He was also head of the analysis branch of the European Union’s Economic and Monetary Unit (EMU), which informed and administered any future assessment of the five economic tests reviewing progress of the single currency in the Euro area. He has also worked at Oxford Economics, the Institute of International Finance in Washington DC, and Tokai Bank Europe, London.