Sean O'Sullivan
Partner, Tax
Location: London
Services: Corporate Tax, Indirect Tax, R&D Tax Credit, Transfer Pricing
Industries: FinTech, Manufacturing and Wholesale, Professional Services, Technology

With 15 years as a UK tax professional, Sean helps businesses expand internationally from and to the UK. He provides comprehensive tax services covering direct and indirect taxation, as well as equity and benefit reporting.
He brings knowledge in serving clients in several industries, including fintech, SaaS, software, and biotech.
As a comprehensive tax advisor, Sean specializes in VAT consulting. He helps businesses maintain UK and EU compliance while advising on optimal European operational structures. His expertise guides companies through complex VAT regulations for cross-border goods movement and electronically supplied services.
Interesting tidbit
Sean is an avid sports fan. He’ll try his hand at anything, although he’s historically been a master of nothing.
Certifications
Associate Chartered Accountant – ACA (United Kingdom)
Community
Member – Institute of Chartered Accountants in England and Wales (ICAEW)
Education
Bsc/Accounting and Finance – Southampton University
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