David worked in private practice as a rural general practitioner and has 12 years in private psychiatry practice. David is a Professor, Mental Health Research within the School of Applied Psychology (Griffith University) and Adjunct Professor at Queensland University of Technology. He has held leadership roles in QLD Health and NSW Health. He was awarded a Medal of the Order of Australia for development of community based mental health services for veterans, development of community post-traumatic stress disorder and anxiety and substance abuse treatment.