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Sian Sinclair
Brisbane
Office Chair - Brisbane

Sian Sinclair

Partner - Tax
Office Chair - Brisbane

Sian’s expertise draws on over 25 years’ experience in taxation, accounting and general business consulting. Advising clients from the start-up and growth phases of business through to those looking to realise their wealth via exit strategies, her input is focused and practical with real insight into the issues impacting businesses.

With experience managing tax risk for large groups, including advising on significant transactions, restructures and group consolidations, Sian oversees the tax compliance and planning needs of both Australian and international business groups.

After beginning her career in Brisbane, Sian joined Grant Thornton in 2001 and has worked in our Brisbane, Melbourne and USA firms. She was appointed a Tax Partner in 2007 and is currently the Office Chair of Grant Thornton Brisbane. 

Sian has extensive experience with businesses in the property and construction industries, having held leadership roles both nationally and globally with Grant Thornton in this space. Sian advises key industry participants on tax matters and works closely with key industry bodies and regulators on shaping the tax environment.  

Sian is a board member with Queensland Trust for Nature and a member of the Audit and Risk Committee since 2023. 

Other industry experience includes:

  • Hospitality and accommodation services
  • Professional services firms
  • Transport and logistics

 Memberships:

  • Divisional Council member of Property Council of Australia – Queensland
  • Board Member of Trustee – Queensland Trust for Nature (QTFN)
  • The Tax Institute – Chartered Tax Advisor
  • Chartered Accountants Australia and New Zealand – Chartered Accountant
  • QUT Bachelor of Business (Accountancy)
  • Graduate of Australian Company Directors Course
Qualifications
  • The Tax Institute – Chartered Tax Advisor
  • Chartered Accountants Australia and New Zealand – Chartered Accountant
  • QUT Bachelor of Business (Accountancy)
  • Graduate of Australian Company Directors Course
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Sian Sinclair
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Sian Sinclair
Office Chair - Brisbane
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