He is Medical Director for Drug Health Services for the Sydney and South West Sydney Local Health Districts and has been a consultant to Royal Prince Alfred Hospital for 12 years. He is a Foundation Fellow of the Royal Australasian College of Physicians Chapter of Addiction Medicine, a conjoint Professor at the University of Sydney. His research has been funded by grants from NIH, NHMRC, AERF and DVA. He has served on numerous state and national policy advisory committees and is a NHMRC Practitioner Research Fellow.