Sinead O'Neill Associate Director - Forensic & Investigation Services Belfast +44 28 9587 1134


Sinead joined Grant Thornton in 2015 having previously worked in Corporate Finance, Restructuring and Forensic in a Big Four firm.

Sector experience

Sinead’s experience includes investigating whistle-blower claims in a number of publicly funded entities. These claims include misappropriation of public funds, employee fraud and employee misconduct.

In addition Sinead has presented on the topics such as fraud and corporate governance to chief officers in the Third Sector, financial institutions and local NI businesses.

Sinead has also provided quantification of loss revenue and profits in relation to legal proceedings and has played a key role in producing Expert Witness Reports across a number of jurisdictions.  

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
  • Postgraduate diploma in Advanced Accounting at University of Ulster
  • A degree in Economics and Accounting from Queen’s University