Steve has been involved in prevention, treatment and policy research and practice, and service management for more than 35 years. He has been the Director of two national drug research centres, in Adelaide (NCETA until 2000) and subsequently Perth (NDRI until 2016), and he worked with the Western Australian Government Drug and Alcohol Office for many years. He has chaired national expert groups on responses to alcohol, co-existing mental health and drug problems, contributed to national clinical practice guidelines and learning outcomes, and led the development of the first National Amphetamine-Type Stimulant Strategy. Other current and past roles have included:
- Deputy Chair, Australian National Advisory Council on Alcohol and Drugs, the principal drug advisory group to the Australian government; and,
- Member, Child Death and Domestic Violence Review Panel, Ombudsman (WA).
In 2015 he received the Senior Scientist Award for the Australasian Professional Society on Alcohol and other Drugs and in 2017 was the winner of the National Honour Roll as part of the 2017 Alcohol and Drug Excellence and Innovation Awards.