Sinead O'Neill
Director - Forensic Accounting

Sinead O'Neill


Sinead joined the Grant Thornton team in 2015 having previously worked in Corporate Finance, Restructuring and Forensics in a big four firm.

Sinead’s experience includes quantification of the loss of revenue and profits in relation to legal proceedings and has played a key role in producing numerous Expert Witness Reports across various jurisdictions.

Sinead has also investigated whistle-blower claims in a number of publically funded entities, including misappropriation of public funds, employee fraud and misconduct.

In addition Sinead has carried out a number of independent investigations across a range of sectors including a review of costs and the allocation of same in relation to the compliance of specific EU legislations and an investigation into the selling and distributing of unregistered products by a global brand in the drinks market.

Sinead has presentenced on topics such as fraud and corporate governance to Chief Officers 3rd Sector (CO3), financial and educational institutions and to local and international businesses.

Sinead is also a Board Member of the Irish Chapter of the Association of Certified Fraud Examiners.  

Sector experience

Sinead has experience across a wide range of sectors including:

  • Public sector;
  • Charities;
  • Film;
  • Education;
  • Food and beverage;
  • Retail;
  • Property;
  • Pharmaceutical;
  • Transport;
  • Licensed premises;
  • Construction; and
  • Banking.
  • CAI Diploma in Forensic Accounting from Chartered Accountants Ireland
  • Postgraduate diploma in Advanced Accounting from University of Ulster
  • A degree in Economics and Accounting from Queen’s University
Sinead O'Neill
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Director - Forensic Accounting
Sinead O'Neill
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