Professor Clement Loy is a neurologist and Professor of Clinical Epidemiology at the University of Sydney School of Public Health within the Faculty of Medicine and Health. He earned a BA in Pure Mathematics, MBBS, MMed in Clinical Epidemiology, PhD in the clinical and molecular genetics of frontotemporal dementia, and holds qualifications including FRACP in Neurology, MBA, and FRSN. Loy completed his initial medical education at the University of Sydney with a combined BA/MBBS, followed by specialty training in neurology and subspecialty training in cognitive neurology at the University of Sydney.

Loy's research specializations encompass molecular genetics and clinical epidemiology, with a focus on Huntington's disease, frontotemporal dementia, and other familial dementias. He leads a dementia research program at the University of Sydney Brain and Mind Centre, utilizing advanced methods to address heterogeneous clinical phenotypes in affected families. As former Director of the Huntington Disease Service at Westmead Hospital, he has advanced HD research through studies on psychosis and longitudinal outcomes, gait and balance, falls, late-onset disease, and phenotypic atlases. Notable publications include 'Huntington's disease' in The Lancet (2010), 'Psychosis and longitudinal outcomes in Huntington disease' in the Journal of Neurology, Neurosurgery & Psychiatry (2020), and the Cochrane review 'Galantamine for dementia due to Alzheimer's disease and mild cognitive impairment' (updated 2024). His contributions include NHMRC-funded projects such as a Dementia Fellowship (APP1107657) and leadership of a project in a $40 million Sydney medical research funding initiative (2022). Loy has taught and coordinated clinical epidemiology and public health courses at the University of Sydney, contributed to evidence synthesis at the Charles Perkins Centre, and served on committees including the Advisory Committee on Medicines. With 129 research works cited over 9,700 times, his scholarship impacts neurodegenerative disease research and clinical practice.