Professor Bryant has researched the nature, course, and treatment of PTSD for over 20 years. His Traumatic Stress Clinic is recognised as one of the world’s leading PTSD treatment research centres, including conducting the world’s first large-scale trial of psychological treatment of emergency responders. Professor Bryant has produced over 500 publications on traumatic stress and anxiety, and has written the seminal book on acute stress disorder. He has served on both the DSM-5 and ICD-11 work groups that have written the recent PTSD diagnostic guidelines. In 2016 he received the Companion of the Order of Australia for services to research and management of traumatic stress.