YEARBOOK & DIRECTORY

The Yearbook & Directory of Ireland's international financial services industry
Saturday, 11th April 2026

O'Sullivan, Brian


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Firm: Grant Thornton
Position: Partner - US Irish Business Group
Address: 13-18 City Quay, Dublin 2, D02 NY19
Phone: +353 1 408 6977
Email: brian.osullivan@ie.gt.com
Personal URL: https://www.grantthornton.ie/meet-our-people1/brian-osullivan/

Special Areas:

Brian is a Partner of our Financial Services division, bringing his depth of experience to engagements across both our audit and advisory departments. Brian originally started with the firm in 2007 before spending over three years with one of Ireland’s pillar banks, a further three within the banking and capital markets team of a big 4 firm and returning back to Grant Thornton to assist with the growth of our financial services offering.

Brian will be based out of New York (post COVID) to lead our US/Ireland desk and the collaboration of our offerings between Grant Thornton US and Grant Thornton Ireland.

Qualifications:

Member of Chartered Accountants Ireland (CAI)