Professor Guy Marks AO FAHMS is a respiratory and public health physician and environmental epidemiologist. His main research interests are in chronic respiratory disease (asthma and COPD), tuberculosis and the adverse health effects of exposure to air pollution. He is Scientia Professor in the School of Clinical Medicine, Discipline of Medicine, South Western Sydney Campus at UNSW Sydney and a physician in the Department of Respiratory Medicine at Liverpool Hospital. He is currently an NHMRC Senior Principal Research Fellow. He is head of the Respiratory and Environmental Epidemiology group at the Woolcock Institute of Medical Research, co-leader of Woolcock Vietnam, and an Honorary Professor at The University of Sydney (Sydney Medical School).

His other major role is as President (and interim Executive Director) of the International Union Against Tuberculosis and Lung Disease (The Union).

In 2020 Guy was elected to Fellowship of the Australian Academy of Health and Medical Sciences. In 2022 he was awarded an Officer of the Order of Australia (AO) for distinguished service to respiratory medicine and research, and to tertiary education.

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