Associate Professor Nathaniel Marshall is a clinical triallist and epidemiologist specialising in sleep and sleep disorders at the Woolcock Institute for Medical Research and the Sydney Nursing School. 

He uses a wide variety of epidemiological research methods and designs, including randomised controlled trials and population-based cohorts, including the Busselton Health Study. With his colleagues, he is attempting to measure the impact of disease, the effectiveness of a variety of treatments, and investigate health system activity related to sleep. He provides high-quality evidence-based information of direct and immediate utility to both practicing clinicians and policy-makers.

Associate Professor Marshall has over 15 years' practical experience in designing, running, analysing, reporting and reviewing both pharmacological and non-pharmacological studies in sleep medicine.

He has undergraduate degrees in psychology and accounting and a postgraduate diploma in health sciences from the University of Otago. His PhD in public health focused on clinical trials and related methodology (Massey University in New Zealand).

Associate Professor Marshall serves on the Editorial Board of the European Respiratory Journal. In 2022 he received an award as one of the 2021 Reviewers of the Year from the American Journal of Epidemiology.

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