William Dillon-Leetch


William is a partner in our Corporate team. His practice includes mergers & acquisitions, corporate advisory work, fundraisings, venture capital, joint ventures, corporate reorganisations and IPOs.

William advises clients across the energy, pharmaceutical, technology, finance, aviation and real estate sectors.

William joined Mason Hayes & Curran in 2018 having extensive domestic and international experience, including with the corporate department of US global law firm K&L Gates in Sydney.


  • Company Law
  • Mergers and Acquisitions
  • Corporate Finance
  • Private Equity
  • Inward Investment
  • Corporate Structures and Re-organisations
  • Joint Ventures and Shareholder Arrangements
  • Venture Capital

Speaking Engagements & Teaching

William is a frequent guest speaker at lectures on corporate law at the Law Society of Ireland.

  • LinkedIn

Areas of Expertise

Corporate Law Mergers & Acquisitions Company Law Private Equity and Venture Capital

Professional Memberships

Law Society of Ireland

Law Society of England and Wales (non-practising)

Law Society of New South Wales (non-practising)


Trinity College Dublin, LLB

The London School of Economics and Political Science, LLM