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Mason Hayes & Curran LLP

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Mason Hayes & Curran LLP is a full-service law firm that has built a strong reputation for handling contentious and non-contentious matters. The team regularly assists clients with statutory and non-statutory public inquiries, advising public sector bodies on data privacy, governance, and regulatory issues encompassing licensing, compliance, investigations, and enforcement. Catherine Allen leads the public, regulatory and investigations team, and Brian Horkan heads the health and prosecutions practice. Other key practice members include Lisa Joyce, Aoiffe Moran and Laura Rattigan.

Legal 500 Editorial commentary

Testimonials

Collated independently by Legal 500 research team.

  • ‘The team have a particular set of skills and a willingness to problem solve and find unique solutions. Their commitment to the issue at hand is notable. They work very collaboratively.’
  • ‘Brian Horkan stands out as an individual who excels in bringing collaboration to the table to seek solutions. His attention to detail and compassion is apparent. He seeks to progress matters in a strong and focused manner, and his ability to bring results alongside collaboration is a strong trait.'
  • ‘Three attributes are essential for any successful legal advisor, and without any one of them, the other two are meaningless. Affability, ability and availability are all necessary components and exemplified by this team in the delivery of sound legal advice in their area of expertise.’
  • ‘The entire team, particularly Lisa Joyce, has been an exceptional advisor to us over a long period.’
  • ‘Mason Hayes & Curran stand out for their people - they provide sensible, practical advice based upon sound experience in the public sector, and an unparalleled understanding of the law as it applies in the public sector.’
  • ‘The team at Mason Hayes & Curran is excellent, and stand-out performance comes from Catherine Allen in particular. Superb professionals.’
  • ‘The team are always very responsive and has extensive knowledge. Always keep us up to date with developments in the area. Very good at distilling complex legislation.’
  • ‘Both Lisa Joyce and Aoiffe Moran are always willing to prioritise our matters, even at short notice. Both have an in-depth knowledge of their areas of expertise. I always feel that advice is only a phone call away.’

Key clients

  • Adoption Authority of Ireland
  • Chartered Accountants of Ireland
  • Child and Family Agency
  • Children’s Health Ireland
  • Coillte
  • Commission for Aviation Regulation/Irish Aviation Authority
  • Commission for Communications Regulation
  • Commission for the Regulation of Utilities
  • EirGrid
  • Electricity Supply Board
  • Enterprise Ireland
  • Environmental Protection Agency
  • Health and Safety Authority
  • Health Insurance Authority
  • Law Society of Ireland
  • Legal Aid Board
  • Legal Practitioner’s Disciplinary Tribunal
  • Medical Council
  • Meta
  • National Gallery of Ireland
  • National Museum of Ireland
  • National Orthopaedic Hospital Cappagh
  • National Treasury Management Agency
  • Nursing and Midwifery Board of Ireland
  • Office of the Regulator of the National Lottery
  • Register of Irish Sign Language Interpreters
  • Road Safety Authority
  • Sea Fisheries Protection Authority
  • Sustainable Energy Authority of Ireland
  • Teagasc
  • The Pensions Authority
  • University College Dublin

Work highlights

  • Advised the Irish Aviation Authority on intricate capacity decisions concerning the allocation of take-off and landing slots at Dublin Airport, considering the airport's limitations.
  • Advised Meta Platforms Ireland Ltd on a landmark European data protection inquiry concerning the legality of transferring European user data to the US for the Facebook service.
  • Represented Chartered Accountants in Ireland in a complex judicial review case, Little v Institute of Chartered Accountants in Ireland.

Lawyers

Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Laura Rattigan
Mason Hayes & Curran LLP
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Lisa Joyce
Mason Hayes & Curran LLP
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Aoiffe Moran
Mason Hayes & Curran LLP

Practice head

The lawyer(s) leading their teams.

Catherine Allen, Brian Horkan

Other key lawyers

Lisa Joyce, Aoiffe Moran, Laura Rattigan