Professor Stephen Simpson AC is Academic Director of the Charles Perkins Centre, and a Professor in the School of Life and Environmental Sciences at the University of Sydney, and Executive Director of Obesity Australia.

Stephen was born in Melbourne. After completing his undergraduate degree at the University of Queensland, he undertook his PhD at the University of London. He spent 22 years at the University of Oxford, first in Experimental Psychology, then in the Department of Zoology and the Oxford University Museum of Natural History, before returning to Australia in 2005 as an ARC Federation Fellow.

Stephen has been Visiting Professor at Oxford, a Fellow of the Institute for Advanced Study (Wissenschaftskolleg) in Berlin, Distinguished Visiting Fellow at the University of Arizona, and Guest Professor at the University of Basel.