Gary Kass is a professional environmental scientist and knowledge broker, with 35 years’ practice in the public and private sectors, working at the interface of science and policy. He champions forward-looking, systemic and interdisciplinary approaches to using science and evidence to tackle critical environmental and sustainability challenges. After a period of consulting, Gary joined the public sector in 1995 as Head of the Environment and Energy programme at the Parliamentary Office of Science and Technology and then Head of Public Engagement with Science and Technology within the UK Government. Gary joined Natural England in 2007 as Principal Specialist in Strategy and Environmental Futures and became Deputy Chief Scientist in 2014. Gary has served on academic panels and boards including the Natural Environment Research Council’s Innovation Advisory Board and the Research Excellence Framework. Gary is a Visiting Professor at the Centre for Environment and Sustainability at the University of Surrey where he supports development of key competencies for sustainability. Gary held a Cambridge Centre for Science and Policy Fellowship, 2011-2013 and was Council member and then Chair of Institution of Environmental Sciences from 2014 until 2021. Gary is a Chartered Scientist and a Fellow of the Royal Geographical Society.