She specialises in tax controversy and tax dispute resolution. Dioni brings two decades of experience helping large businesses navigate the full life cycle of Australian Taxation Office reviews, audits, objections and litigation, as well as investigations conducted by state-based revenue authorities, drawing on strong relationships with administrators and a clear understanding of how they operate.
Dioni advises on complex disputes involving the tax treatment of financing, intellectual property, investments, transactions and royalties. Her expertise spans across various tax issues affecting large businesses including the general anti-avoidance rule, transfer pricing, capital revenue, capital gains tax, capital allowances, tax losses, R&D and withholding tax. She supports clients from early engagement with revenue authorities to strategic positioning for settlements and litigation, with a focus on managing risk and achieving commercially sound outcomes.
She is an experienced litigator and has conducted matters in the Federal Court of Australia, High Court of Australia and Administrative Review Tribunal.
Dioni advises ASX-listed entities, large inbound multinational groups and large private enterprises across sectors including mining, resources, infrastructure, energy, renewables, consumer and gaming.