Emma Letitia Johnston (born 1973) is the Deputy Vice Chancellor (Research) at the University of Sydney. She was former, Dean of Science at the University of New South Wales and President of Science & Technology Australia. She is an authority in marine ecology and a former Pro Vice-Chancellor (Research) at UNSW. Whilst at UNSW, Professor Johnston was head of the Applied Marine and Estuarine Ecology Lab at UNSW and led major projects for industry, government, the Australian Research Council and the Australian Antarctic Science Program. Johnston was the inaugural Director of the Sydney Harbour Research Program at the Sydney Institute of Marine Science.Johnston's research group at UNSW investigates the ecology of human impacts in marine systems, combining the diverse disciplines of ecology, microbiology and ecotoxicology to expand fundamental understanding and provide recommendations for management. Her research is conducted in such diverse field environments as Sydney Harbour, Antarctica, the Great Barrier Reef and temperate Australian estuaries. As of 2017, Johnston has published over 112 peer-reviewed works. Source: Wikipedia (en)