Williams was admitted to practice as a legal practitioner in 1993. After graduating from university he served as an associate to Justice Michael McHugh in the High Court of Australia. Williams then worked for a year as a solicitor at the law firm Blake Dawson Waldron, in Sydney. In 2000, Williams was admitted to practice as a barrister in New South Wales. He has appeared in the High Court of Australia several times, although not in a speaking role. Williams also appeared in Republic of Fiji v Prasad in the Supreme Court and Court of Appeal of Fiji, on the legality of the 2000 coup.
Academic career
In 1995 Williams began his academic career as a lecturer at the Australian National University. He was appointed to Senior Lecturer in 1996. His first book was Australian Constitutional Law and Theory: Commentary and Materials, co-authored in 1996 with Tony Blackshield and Brian Fitzgerald, now in its seventh edition. Williams was a visiting scholar at Columbia Law School in the Spring semester of 1999. In 2000, Williams took up a position at the Faculty of Law at the University of New South Wales as Anthony Mason Professor of Law. In 2001, Williams helped found the Gilbert + Tobin Centre of Public Law at UNSW, and was its Foundation Director until 2008. In 2008, Williams was a delegate in the governance stream at the Australia 2020 Summit. In 2005, he chaired the Victorian Human Rights Consultation Committee that led to the enactment of the Victorian Charter of Human Rights and Responsibilities. On 13 June 2011, Williams was appointed an Officer of the Order of Australia for distinguished service to the law in the fields of anti-terrorism, human rights and constitutional law as an academic, author, adviser and public commentator. In 2012, Williams said he would be "very interested" in being appointed as a judge of the High Court of Australia. News magazine Crikey reported that Williams had published a favourable opinion piece commending then Attorney-General Nicola Roxon, who would later that year need to recommend appointment of a new High Court judge. In 2013 he was elected a fellow of the Academy of the Social Sciences in Australia. From October to December 2015, Williams was a Fellow at the Institute of Advanced Study at Durham University. He has also held visiting positions at Osgoode Hall Law School and University College London. Williams was appointed Dean of the UNSW Faculty of Law in 2016.
Politics and views
Political affiliations
In 2006, Williams was elected head of the Australia Labor Party's legal and constitutional committee. In 2007, Williams unsuccessfully sought pre-selection as the Labor candidate for the Sydney electorate of Blaxland. In 2009, while on sabbatical from UNSW, Williams unsuccessfully sought pre-selection as the Labor candidate for the Canberra electorate of Fraser.
