Phil works for the UK Natural Environment Research Council (NERC) as a programme Science Coordinator, based at the University of East Anglia, Norwich. He has been involved in the planning and implementation of multi-institute and multidisciplinary research initiatives since the mid-1980s, working for Plymouth Marine Laboratory, the International Geosphere-Biosphere Programme and NERC. Topics have included marine biogeochemistry, ocean-atmosphere interactions and climate geoengineering. Recent activities have included scientific leadership of the UK Ocean Acidification research programme (co-funded by NERC and two government departments, Defra and DECC) and the Shelf Sea Biogeochemistry programme (co-funded by NERC and Defra). Williamson has led two reports on climate geoengineering for the Convention on Biological Diversity (CBD), and has also co-authored reports on ocean fertilization for the Intergovernmental Oceanographic Commission (IOC-UNESCO), and on ocean acidification for OSPAR and the CBD. He has participated in several Conferences of Parties of the UN Framework Convention on Climate Change (UNFCCC), and is a lead author for the Special Report on Ocean, Cryosphere and Climate for the Intergovernmental Panel on Climate Change (IPCC). Phil’s main current work is as Science Coordinator for the UK Greenhouse Gas Removal programme, co-funded by NERC, other Research Councils and the UK government (BEIS).