Professor Sir Simon Wessely is a psychiatrist and epidemiologist. He started his psychiatry training at the Maudsley in 1984, and joined King’s College School of Medicine. He has been at the Institute of Psychiatry, Psychology & Neuroscience of King’s College London ever since.

He is a Consultant Psychiatrist at King’s College Hospital and the Maudsley Hospital, all of which are part of the Academic Health Sciences Centre. There, he practices what is known as liaison psychiatry, which is all about the boundaries and overlaps between physical and mental health. Finally, he is currently the President of the Royal College of Psychiatrists.

Wessely has co-authored books on CFS, psychological reactions to terrorism, randomised controlled trials, and a history of military psychiatry, From Shell Shock to PTSD. His 2013 Knighthood was awarded for services to Military healthcare and psychological medicine. He was named among the 2014 and 2015 Top 100 Clinicians in the Health Service Journal, listed in Debrett's Top 500 as one of the 7 most influential doctors in the country. On 26 June 2019. he was awarded an Honorary Doctorate of Science by the University of Oxford. On 6 May 2021, he was elected a Fellow of the Royal Society.