Josh Gibson completed his PhD in the Faculty of Law in June 2025. His doctoral thesis, Friends of the Australian High Court: Amici Curiae in Constitutional and Public Interest Litigation, explored the use of amicus curiae ('friend of the court') by civil society groups in Australia's apex court, the High Court of Australia. 

More generally, Josh's research interests include public law, human rights, and criminal and national security law. In particular, Josh is interested in how legal institutional structures impact access to justice, and the ways in which social movements mobilise the law to achieve social change. He is particularly interested in the use of sociolegal and qualitative methods used to explore these areas of legal research in the Australian context. 

Outside academia, Josh is a Senior Legal Researcher for the Australian Commonwealth Parliament. Prior to this, he was a Senior Legal Officer at the Commonwealth Attorney-General's Department. Additionally, he has taught across several universities in areas of legal research, constitutional law, public law, and human rights. 

Josh was the 2019 Higher Degree Research Faculty Representative for the Faculty of Law at UNSW, and a former Editor of the Human Rights Defender.

Josh is an admitted lawyer in the Supreme Court of NSW.