James O'Brien is a Global Mobility Tax Director currently at BDO UK LLP, where they assist private clients and employers in navigating cross-border tax complexities between the UK and the US. With over 15 years of Big 4 experience, including a long tenure at Deloitte, they have developed extensive expertise in US/UK tax, focusing on compliance and planning strategies for globally mobile populations. James holds a BA (Hons) in History and Politics from the University of Warwick and is qualified as both a UK ATT and a US Enrolled Agent.
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