Dr Lee joined the Institute of Mental Health (IMH) in 1994. He is currently a Psychiatrist and a Senior Consultant and is the Programme Director of National Addictions Management Service (NAMS) and the Clinical Director, Office of Population Health at IMH. Dr Lee is an Adjunct Associate Professor at Lee Kong Chian School of Medicine, NTU and an Adjunct Assistant Professor and Clinical Senior Lecturer at Yong Loo Lin School of Medicine, NUS. Dr Lee has been appointed as a Justice of the Peace since 2018 and is a member of the Board of Visiting Justices and Board of Inspection for Ministry of Home Affairs. Dr Lee is the Chairman of the Drug Rehabilitation Centre Review Committee 1 since September 2021; the Chairman of the Singapore Armed Forces Psychiatry Advisory Board since 2020 and a member of the Singapore Red Cross Academy Advisory Panel since 2021. He is a member of the Public Service Commission’s Disciplinary Panel of Persons. He is an accredited Mediator at the Singapore Mediation Centre since November 2018. Dr Lee is currently the President of the Singapore Association for Mental Health (SAMH) and the immediate past President of the Silver Ribbon Singapore (SRS). He is also a Board Member of We Care Community Services. He was a board member of the National Council for Social Service (NCSS) from 2014 to 2020. He was also a past President of the Singapore Psychiatric Association (SPA).