Professor Zachary Steel is the St John of God Professorial Chair of Trauma and Mental Health, a partnership between St John of God Richmond Hospital, the School of Psychiatry UNSW and the Black Dog Institute. He has worked in the field of traumatic stress for over 20 years as a researcher and clinician, examining the prevalence, social determinants, and intervention models for mental health problems across diverse communities and settings with a particular focus on traumatic stress, forced displacement, conflict and complex emergencies.