Will Steffen is an Earth System scientist. He is a Councillor on the publicly-funded Climate Council of Australia that delivers independent expert information about climate change, an Emeritus Professor at the Australian National University (ANU); Canberra, a Senior Fellow at the Stockholm Resilience Centre, Sweden; and a Fellow at the Beijer Institute of Ecological Economics. Until 2004, Steffen was the Executive Director of the International Geosphere-Biosphere Programme, based in Stockholm. His research interests span a broad range within climate and Earth System science, with an emphasis on incorporation of human processes in Earth System modelling and analysis; and on sustainability and climate change.