Ian Halligan appointed Baker Tilly International’s new global head of tax

Baker Tilly International is pleased to announce the appointment of Ian Halligan as global head of tax for the top ten global accountancy network, effective immediately.

Based in Washington D.C., Ian will work with tax professionals across the network, leading and executing the global tax strategy while delivering tax-related business development, knowledge sharing and learning initiatives.

Ian has been advising expatriates, inpatriates and high-net-worth individuals on international tax matters for over three decades. He started his career in London, moving to Chicago in 2001, and practising in Washington D.C. since 2022. He is qualified in both the UK and the US and currently leads international tax services for Baker Tilly in the US.

Ian 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, CEO of Baker Tilly International, said: “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.  

“I would like to take this opportunity to thank his predecessor Chris Johnson for his dedicated leadership and hard work over the past three years.”

Baker Tilly International recently announced record global revenues of US$6.8 billion for the year ending 31 December 2025, marking a 21% increase over the previous year. This significant growth was in part driven by a 31% rise in tax revenues, the fastest-growing service line in the network.