He is a former president of Australian Lawyers for Human Rights. He was awarded the Human Rights Medal by the AHRC in 2009. Stephen represented Dr Mohamed Haneef who was wrongly accused of a terrorism offence in 2007.
Stephen publishes book reviews (and is the book review editor of) Hearsay, the journal of the Bar Association of Queensland. Stephen serves on human rights and criminal law committees, respectively, of the Law Council of Australia and the Bar Association of Queensland.