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Corporate tax expert Mark O'Sullivan is highlighted for his international background, having studied overseas at the Université de Toulouse, and splitting his time between the firm's Dublin and Palo Alto offices.
Tax: Chambers Global 2011
Clients say Mark O'Sullivan "quickly grasps complex issues."
Tax: Chambers Global and Chambers Europe 2010
Mark brings an invaluable knowledge of European tax to the USA and is "quick to respond to technical issues and is also a pleasure to work with," according to clients.
Tax: Chambers Europe 2009
Mark O'Sullivan
LOCATION Dublin and Palo Alto
T + 353 1 232 2268 / +1 650 617 3351
F + 353 1 232 3333 / +1 650 617 3251
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Expertise
Mark O’Sullivan is a partner in the firm’s Tax Department and advises on all aspects of Irish corporate taxation. His primary focus is advising overseas clients establishing operations and doing business in and through Ireland. Mark also advises extensively on all aspects of international tax planning, including IP planning, cross-border reorganizations and financing transactions.
Mark was previously seconded to the legal department of a large investment bank in London in 2004. Mark has been based in the firm's Palo Alto office since 2007.
Mark is an active member of the Tax Section of the American Bar Association (ABA), the International Fiscal Association and is also a member of the New York City Bar Committee on Taxation of Business Entities. Mark regularly speaks on international tax issues at Tax Section meetings of the ABA and has presented at a number of Tax Executives Institute (TEI) seminars. Mark has also published articles in the International Tax Review, the Irish Taxation Review, IFLR, BNA and Finance Magazine.
Education
Law Society of Ireland
University College Dublin and Université de Toulouse (France), Bachelor of Civil Law
University College Dublin, Diploma in Financial Services Law
AITI / Chartered Tax Adviser (CTA)
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