Professor of Sleep and Circadian Medicine and Head, School of Psychological Sciences, Monash University in Melbourne, Australia

Lecturer in Medicine, Division of Sleep Medicine, Harvard Medical School and Brigham and Women’s Hospital

Chair, Sleep Health Foundation

President, International Association of Circadian Health Clinics

Professor Rajaratnam has 30 years of experience in sleep research, and was trained in leading research laboratories in the UK (Surrey) and USA (Harvard Medical School). He was awarded his PhD degree from Monash University in 1998, and completed a Bachelor of Laws degree in 2000. 

He is an expert on the circadian regulation of sleep and health, including in shift workers. He has published more than 200 peer-reviewed journal articles, including in premier journals such as Lancet and JAMA. Over the past 10 years, he has been an investigator on more than $30 million in awarded grants. His research interests include the effects of sleep loss and circadian disruption on health, and alertness management programs for shift workers. He is a past President of the Australasian Sleep Association and the current Chair of the Sleep Health Foundation. He is a Fellow of the Australian Academy of Health and Medical Sciences. Professor Rajaratnam is a registered psychologist in Victoria, Chartered Psychologist in the UK and Associate Fellow of the British Psychological Society.  He served as a Program Leader for the Alertness CRC.