George Comino
Tom Goodwin
Natalie Wissa
Senior Associate
Ryan Steele
Rachel Shin
Senior Associate
Louise Yuen
Senior Associate
Lekha Prasad
Elena Martino

Joanne Casburn

Special Counsel

Joanne has 30 years of experience in tax and now specialises in tax dispute resolution and litigation.

Joanne served as an Assistant Commissioner at the Australian Taxation Office (ATO) for a decade, accumulating almost two decades in various senior positions within the ATO. Her extensive ATO background equips her with distinctive perspectives for effectively addressing ATO-related disputes, and her reliable advice has consistently led to favourable resolutions for clients, preventing financial losses in tax disputes.

During her time at the ATO, Joanne held key responsibilities, including managing the ATO’s largest audits and disputes, and she was responsible for the regional audit staff in Queensland. She played a pivotal role as the ATO’s primary liaison for tax issues within the property and construction sector and is an expert in the ATO’s expectations for tax governance.

Joanne is also the trusted adviser to the Board and company secretary of Crestnut Products Pty Ltd trading as Nutworks. This work gives Joanne hands-on experience working closely with a private group on regulatory and legal issues that arise for manufacturing businesses in the agricultural industry.

Joanne is a State Councillor for the Queensland Branch of the Tax Institute and a regular presenter at Tax Institute events.

Prior to joining Hamilton Locke, Joanne worked at Holding Redlich where she was involved in disputes and litigation on precedential tax issues. She also worked at big four accounting firms, specialising in tax, prior to joining the ATO. Her experience covers tax from an accounting, legal, and regulatory perspective.


Tax; Disputes and litigation


  • 2020 Finalist in The Tax Institute’s SME Tax Adviser of the Year Awards


  • Bachelor of Laws and Bachelor of Economics – Sydney University
  • Masters of International Tax – University of New South Wales


  • Commissioner of Taxation v Guardian AIT Pty Ltd ATF Australian Investment Trust [2023] FCAFC 3 – leading case on the application of section 100A and Part IVA to certain trust distributions.
  • JMC Pty Ltd v Commissioner of Taxation [2023] FCAFC 76 leading case on employee versus contractor and superannuation guarantee charge.
  • Cavanagh and Commissioner of Taxation [2023] AATA 1700 first case on the entitlement of a taxpayer to access small business litigation funding
  • Deputy Commissioner of Taxation v Markwell (Brisbane district court) on debt proceedings where the ATO was forced to concede.


*The above representations were undertaken at previous firms.