David joined NEF in 2016 following a decade of research, advocacy and campaigning on economics and climate at Friends of the Earth. He leads a team of researchers at NEF that deliver policy, convening and thought leadership on how to ensure a radical and rapid response to ecological and climate breakdown which actively delivers social justice. His particular areas of expertise are the dynamics of local transition, with a particular focus on how to ensure decarbonisation does not hollow out communities and workforces that are particularly reliant on high-carbon jobs. He also has expertise in green taxation, fossil fuel subsidies, and the political economy of climate change in the UK.