Dr Lewis is a Research Fellow in the Integrated Mental Health Research Program in The Department of General Practice of the Melbourne Medical School. He joined the department in June 2018 as the trial coordinator on the Assertive Cardiac Care Trial (ACCT) which is seeking to improve cardiovascular health in people with severe mental illness. Dr Lewis completed a PhD in psychology at La Trobe University and has been worked in a variety of research roles since. Most recently Dr Lewis worked in the Department of Aged Psychiatry at Alfred Health in clinical research and has held roles over his career in Indigenous mental health and cognition, peri-operative cognitive change, dementia research and roles in industry assisting with cognitive test development and research. A key focus of this work has been investigating the intersection of physical health, mental health and cognition and things that can impact on these factors and ways these can be improved. Dr Lewis has published widely in all these areas.