Henry Whitfield is an Association of Contextual Behavioural Science (ACBS) Peer-reviewed Acceptance and Commitment Therapy trainer, an Accredited Advanced TIR (PTSD therapy) Trainer and a Cognitive Behavioural Psychotherapist. For over seven years Henry ran and supervised brief therapy for PTSD projects for Victim Support and Mind in London gun crime hot spots, using CBT and TIR. Henry is also an experienced supervisor of mental health professionals for ACT and Trauma work in the NHS. Now he focuses as a researcher on ACT-consistant psychedelic therapy protocols, especially during the integration phase of therapy. He works with high-density longitudinal data, studying psychedelic-therapy process at Regents School of Psychotherapy and Psychology, Regents University London.