Joshua has a broad public, administrative and commercial law practice. 

He accepts briefs to advise and appear in merits and judicial review proceedings (including migration law matters) and in general and appellate criminal and civil matters, including trade practices, defamation, media and intellectual property matters. He regularly appears in motor vehicle collision proceedings and leasing disputes.

Joshua also accepts pro bono briefs.

Prior to coming to the Bar, Joshua practised extensively in administrative law as a lawyer and solicitor-advocate at Sparke Helmore.

He regularly appeared in the Administrative Appeals Tribunal (AAT), instructed in the Federal Court of Australia and advised government and private sector clients in relation to social security and statutory compensation schemes, including Comcare and military compensation schemes. He appeared before the Mental Health Tribunal as part of Sparke Helmore’s pro bono practice and was seconded to the National Disability Insurance Agency.

Joshua was associate to Deputy President P E Hack SC and Senior Members Regina Perton OAM and Graham Friedman at the AAT, obtaining experience in a wide variety of administrative law matters.

More recently, Joshua was a registry lawyer at the Victorian Court of Appeal, where he prepared summaries of and managed appeals to hearing, gaining valuable procedural and substantive experience in both the civil and criminal appellate jurisdictions.

He has also worked for the Office of the Director of Public Prosecutions (Queensland).

Joshua holds a Juris Doctor (Hons) and received the Dean’s List Award for academic excellence while completing his Master of Laws (specialising in corporate and commercial law). He also holds a Bachelor of Business Management.

Joshua read with Graeme Hill.

Recent cases:

KCCD and Minister for Immigration, Citizenship, Migrant Services and Multicultural Affairs (Migration) [2020] AATA 5145

Kaur v Minister for Immigration, Citizenship, Migrant Services and Multicultural Affairs [2021] FedCFamC2G 42


Jacqui Ewart; Mark Pearson; and Joshua Lessing, ‘Anti-terror laws and the news media in Australia since 2001: how free expression and national security compete in a liberal democracy’ (2013) 5(1) Journal of Media Law 104.


To get in touch with Joshua Lessing | or for more information please contact the Clerk on: +61 3 9225 7222 or

Liability limited by a scheme approved under Professional Standards legislation.