Jillian O’Sullivan – Grant Thornton

Jillian O'Sullivan B+W head and shoulders GT website

+353 (0)1 6805 850




Partner – Corporate Compliance and Advisory
Jillian joined the firm in 1991 and became partner in 2007. She has gained significant experience in restructuring large and medium sized groups, together with implementing tax planning and succession schemes. Jillian has assisted companies establishing a presence in Ireland. She deals with all areas of corporate compliance and the provision of independent corporate compliance health-checks. She lectures extensively and facilitates seminars on both the role and responsibilities of directors in companies.


Sector experience
Jillian has in-depth knowledge of implementing and administering share option schemes and assists the firm’s tax department with the implementation of both domestic and foreign corporate structures. She is fully conversant with Irish, UK and Northern Irish legislation.


Professional qualifications and memberships
Jillian is a member of the Grant Thornton International Outsource network which implements best practice in outsourcing across Grant Thornton member firms. She is a fellow of the Institute of Chartered Secretaries and Administrators and holds diplomas in Commercial law and Corporate Governance from the Law Society of Ireland together with a diploma in Taxation.

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