Sam has worked on food security, rural livelihoods and climate change challenges across Africa, Asia and Latin America over the past 30 years. He has led international development teams for the University of Oxford, PwC, DFID and Oxfam. He was Chief Executive of the Climate and Development Knowledge Network (CDKN) until 2018 and most recently Executive Director of the Rockefeller Foundation Economic Council on Planetary Health at the Oxford Martin School.