David Nabarro is Co-Director of the Institute of Global Health Innovation and Professor of Global Health at Imperial College London. He established the Geneva-based social enterprise Skills, Systems and Synergies for Sustainable Development (4SD) with Florence Lasbennes in 2018. 4SD accompanies development practitioners from local and national Governments, civil society, professional organizations, business enterprises, academic institutions as they advance the transformation of complex people-centred systems. (www.4sd.info) Through 4SD, David serves as Special Envoy of the UN World Health Organization Director General on COVID-19, advises the UN Food and Agriculture Organization on follow up to the September 2021 Food Systems Summit (www.summitdialogues.org), and leads the Food Workstream in the UN Global Crisis Response Group on Food, Energy and Finance (GCRG). This was established by the UN Secretary-General in March 2022. Through the GCRG the UN is responding to the immense pressures faced by governments and households as a result of extraordinary increases in the cost-of-living, exacerbated by the war in Ukraine. The GCRG calls for policy measures that link urgent action with long-term sustainable and equitable development. The three GCRG briefs, and information on the UN-brokered Black Sea Grain Initiative, are available at https://news.un.org/pages/global-crisis-response-group/. David secured his medical qualification in 1974 and has worked internationally in multiple clinical and public health roles in governments, NGOs and universities. He held positions within the UN System between 1999 and 2017, including Special Representative of the UN Secretary-General (S-G) for Food Security and Nutrition, and Under-Secretary-General (and Special Adviser to the S-G) on the 2030 Agenda for Sustainable Development and Climate Change. In October 2018, David received the World Food Prize together with Lawrence Haddad for their leadership in building coalitions for action for better nutrition across the Sustainable Development Goals.