Stuart has worked and undertaken research in sustainability for over twenty years, with a focus on sustainable infrastructure, sustainable cities and improved decision making. This includes specialising in the use of least cost planning for utilities and the advocacy, design, implementation and evaluation of programs for improving resource use efficiency. At the Institute, and previously as Director of Preferred Options (Asia-Pacific) Pty Ltd, he designed or implemented three of Australia’s largest water efficiency programs, in Kalgoorlie Boulder in Western Australia, in northern New South Wales and in Sydney. In 1998 he was appointed as a member of the NSW Task Force on Water Conservation and in 2001 as a member of the Expert Panel on Environmental Flows for the Hawkesbury Nepean. In 2000 he was requested by the NSW Minister for the Environment to undertake an Independent Review of Container Deposit Legislation and has written and presented widely on sustainable futures including taxation, participatory decision-making and public policy.