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Baker Tilly International has appointed Ian Halligan as global head of tax, effective immediately.
Based in Washington D.C., Halligan will oversee the network’s global tax strategy, business development, and knowledge-sharing initiatives across its member firms.
Halligan has over 30 years of experience advising on international tax matters for expatriates and high-net-worth individuals.
Qualified in both the UK and the US, he began his career in London before moving to Chicago in 2001 and Washington D.C. in 2022. He most recently led international tax services for Baker Tilly in the US.
The appointment follows a period of significant growth for the network. Baker Tilly recently reported record global revenues of $6.8bn (£4.98bn) for the year ending 31 December 2025, a 21% year-on-year increase. Tax services was the network’s fastest-growing line, with revenues rising by 31%.
Halligan succeeds Chris Johnson, who held the position for the past three years.
Halligan said: “I’m pleased to be taking on this role at an exciting time for both the Baker Tilly network and the tax profession internationally. Together with our tax teams around the world, I look forward to working with our clients to solve their taxation challenges and opportunities.”
Francesca Lagerberg, chief executive of Baker Tilly International, added: “I’m delighted to welcome Ian to this role. Having a strong and aligned global tax capability is essential to driving our network’s efforts forward. Ian’s expertise in international tax combined with his knowledge of the network, means he’s well placed to execute our global tax strategy effectively.”
