Professor Hall is a Professor and Director of the Centre for Youth Substance Abuse Research at the University of Queensland. Over the past 20 years he has worked in the fields of addiction, mental health and public health, and currently works on the social and ethical implications of research in genetics and neuroscience on addiction and mental disorders. Professor Hall has served on the Technical Advisory Group for the National Survey of Mental Health and Well-being (1997); was a Member of Australian National Council on Drugs (1998- 2001); Member, National Expert Advisory Committee on Illicit Drugs (1998-2002); Member (2001-2007) and Chair (2008-2011) Drug Utilization Subcommittee of the Pharmaceutical Benefits Advisory Committee; Expert Advisor to Therapeutic Goods Administration (2008-2010); and a Member of the Evaluation Advisory Subcommittee of Medical Services Advisory Committee since 2011. He has advised the World Health Organization on: the health effects of cannabis use; the effectiveness of drug substitution treatment; the scientific quality of the Swiss heroin trials; the contribution of illicit drug use to the global burden of disease; and the ethical implications of genetic and neuroscience research on addiction. In 2001 he was identified by the Institute for Scientific Information as one of the world’s most highly cited social scientists in the past 20 years.