I started my professional life as a marine biologist and later branched into economics. My research interests centre on the application of economics and biology (bioeconomics) to tackle problems of sustainability in agriculture and natural resources. My recent work has focused on carbon and climate policy, and the economics of biosecurity to protect native ecosystems. I have been a member of a Technical Advisory Group on Control of Invasive Species in the Galapagos Islands and a visiting expert at the Food and Agricultural Organisation of the United Nations (FAO) in Rome. I apply my interdisciplinary expertise to address problems in nature conservation, fisheries, aquaculture, grazing systems, invasive species management, climate policy and sustainable agriculture both in Australia and internationally.