John is a group psychotherapist and independent researcher and a founder member of the Association for Psychosocial Studies. He lives in Brixton in South London and works for the most part in the National Health Service, where he is Consultant Adult Forensic Psychotherapist at Bethlem Royal Hospital and Principal Adult Psychotherapist at Springfield Hospital. Previously he worked for the Henderson Hospital Democratic Therapeutic Community and is a founder member of the Henderson Heritage Group. He is co-author with Christopher Scanlon of the book 'Psycho-social Explorations of Trauma, Exclusion and Violence: Un-housed minds and inhospitable environments' (2022, Routledge). He is also co-editor of Violent States and Creative States: From the Global to the Individual (2018); Forensic Music Therapy (2012); and The Therapeutic Milieu Under Fire: Security and Insecurity in Forensic Mental Health (2012), all published by Jessica Kingsley Publishers.