Mr Jon Legorburu > ByrneWallace LLP > Dublin, Ireland > Lawyer Profile

ByrneWallace LLP
88 Harcourt Street
Saint Kevin's
DO2 DK18

Work Department

Litigation and Dispute Resolution


Head of Litigation and Dispute Resolution


Jon is Head of Litigation and Dispute Resolution at ByrneWallace LLP. His specialist areas are financial services, corporate and intellectual property litigation and he is rated in the legal directories for his work in these areas.

His work focuses on the early economic analysis of cases, rational behaviour in dispute situations, and strategies designed to achieve business gains where conflicts arise.  He is well versed in all types of Court actions including Mareva Injunctions, Anton Piller Orders and other pre-emptive remedies.  He has a very high success rate in getting disputes resolved quickly and effectively.

His chosen areas of specialisation are company and corporate disputes, regulatory disputes, project based litigation in the construction and logistics sectors, and intellectual property/information technology matters. His work has included representing clients in business critical injunctions to protect or freeze assets and he has worked in leading law firms in England and Australasia including Slaughter and May in the United Kingdom and Chapman Tripp in New Zealand, before joining ByrneWallace LLP in 2010.


  • Dublin Solicitors Bar Association
  • Law Society of Ireland
  • Law Society of England & Wales
  • Law Society of New Zealand
  • Member of the Anti-Counterfeiting Group
  • Member of the Society of Computers and the Law


  • Bachelor of Arts (BA)(Honours)(Political Science), University of King’s College, Halifax, Canada, 1990
  • Master of Science (Msc)(Econ)(British Politics), London School of Economics and Political Science
  • Bachelor of Laws (LLB), University of Edinburgh, 1994
  • Common Professional Exam (CPE) , College of Law, Store Street, London, 1995
  • Legal Practice Course (LPC) , College of Law, Store Street, London, 1996
  • Admitted as a Solicitor, Law Society of England & Wales, 1998
  • Admitted as a Barrister, New Zealand Law Society, 1999
  • Admitted as a solicitor in Ireland in 2010

Lawyer Rankings

Ireland > White-collar crime

(Leading individuals)

Jon LegorburuByrneWallace LLP

In addition to representing clients facing investigations and prosecutions, ByrneWallace LLP‘s white-collar crime practice is noted for its expertise in advising regulatory bodies on the exercise of their powers and the drafting of documents and submissions, as well as representing regulators in litigation. Elsewhere, the team is frequently instructed by the victims of white-collar crimes such as cyber breaches and organisations that are not accused of wrongdoing but are drawn into regulatory investigations. The team is jointly led by commercial litigator Jon Legorburu and Sean O’Donnell, who has deep experience of acting for public sector clients.

Ireland > Insurance

ByrneWallace LLP‘s broad capabilities are deployed across the spectrum of transactional, regulatory and contentious matters. It has a fine reputation in the healthcare and environmental segments, and has experienced a steady increase in dispute-related engagements. Jon Legorburu heads the litigation and dispute resolution team and leads the insurance group and litigation partner Mark O’Shaughnessy has a strong background in the insurance sector, including in the environmental sphere.

Ireland > Public sector

The public sector practice at ByrneWallace LLP is notable for its breadth, providing comprehensive advice to public bodies on their operations. Practice head Michelle Ní Longáin specialises in employment law, and is particularly active in advising public sector clients on protected disclosure law. The team also represents clients in litigation, including judicial review proceedings, with Jon Legorburu a key figure in contentious work. Health and social care is a particular sector of focus for the practice; Sinéad Kearney and Olive Doyle specialise in this area. Litigator Sean O’Donnell handles regulatory enforcement proceedings and is also engaged by clients to advice on the response to cyberattacks.

Ireland > Dispute resolution

ByrneWallace LLP remains best known for contentious matters involving public sector bodies, including those in the health, education and tourism sectors. Jon Legorburu leads the team and has an impressive history in commercial litigation and public sector disputes. Mona Costelloe is another senior name with extensive expertise in real estate disputes, regulatory enforcement matters and more general commercial litigation. Sean O’Donnell is also noted for contentious regulatory work, and Mark O’Shaughnessy is a growing force in the market. Valerie Hourigan is rated for real estate and procurement disputes.