Will Steffen is an Earth System scientist. He is a Councilor 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, Stockholm.

He is the chair of the jury for the Volvo Environment Prize; a member of the International Advisory Board for the Centre for Collective Action Research, Gothenburg University, Sweden; and a member of the Anthropocene Working Group of the Sub-committee on Quaternary Stratigraphy. He was the executive director of the Australian National University Climate Change Institute and a member of the Australian Climate Commission until its dissolution in September 2013. He is CoChair of the Scientific Committee of the Common Home of Humanity. His interests span a broad range within the fields of sustainability and Earth System science, with an emphasis on the science of climate change, approaches to climate change adaptation in land systems, incorporation of human processes in Earth System modelling and analysis; and the history and future of the relationship between humans and the rest of nature.