Ronan is a Dispute Resolution Partner specialising in regulatory and statutory offences and remedies including administrative sanction and the relief of Judicial Review. He also practices in the Personal Injury/ product liability areas and has been a past Chairman of the law Society’s litigation Committee.

He has extensive experience in administrative law, medical law, personal Injury cases, statutory Inquiries and Tribunals of Inquiry. He also practises in the area of contentious intellectual property law, specifically trademark and copyright infringement cases.

He regularly oversees cases in the District Court and High Court on behalf of his clients. In the lower jurisdictions, he has excellent advocacy skills and regularly appears on behalf of his clients.

Recent Experience includes advising:

  • The Health Products Regulatory Authority on all aspects of its statutory functions. Recent litigation included large scale High Court proceedings representing the regulator in 135 separate sets of proceedings concerning Pandemrix, the “swine flu” vaccine.
  • British Sky Broadcasting in relation to the protection and enforcement of its intellectual property in broadcasts, in particular broadcasts of Premiership football.
  • A large US based Corporation in relation to the issues it is facing in a case involving cross- border disputes, product delivery issues and market share conflicts.
  • A very large global Medical Device manufacturer and supplier in relation to its devices and multiple Personal Injury Actions.
  • A European wide manufacturer of Medical Devices as regards liability issues for some of its products. 

Representative Clients include:

The Health Products Regulatory Authority, Tuath Housing Association, B Braun Ireland, IDA Ireland, Early Onset Parkinson’s Disease, ADS Pipes, Sky, Colas 


“Ronan defends key regulator clients both as co-defendants in major product liability claims and in judicial review proceedings relating to the authorisation of medicines. He also has wider commercial disputes experience, including copyright matters.”
Chambers Global, 2023

"Ronan is recommended as a 'Key Lawyer'"
Legal 500 EMEA, 2022-2023

"Ronan has particular expertise in medical law and medical regulatory matters."
Legal 500 EMEA, 2023 

"A safe pair of hands."
Chambers Europe, 2022

"Ronan is key for regulatory investigations"
Legal 500 EMEA, 2022

“The experienced Ronan O’Neill…”
Legal 500 EMEA, 2021

“Ronan defends key regulator clients relating to the authorisation of medicines. He also attracts attention from interviewees for his wider commercial disputes experience.”
Chambers Europe, 2021

“Ronan O’Neill is recommended”
Legal 500 EMEA, 2020

“Ronan O’Neill is very approachable”
Legal 500 EMEA, 2019

Ronan O’Neill “handles a broad spectrum of disputes, with experience advising blue-chip companies, banks and regulatory bodies on proceedings”
Chambers Europe, 2019

“Ronan O’Neill is recommended”
Who’s Who Legal, 2019

Sources say that Ronan O’Neill “is practical and has an excellent rapport with clients“
Chambers Europe, 2018

  • Admitted as a solicitor in 1992
  • B.C.L. (1987), University College Dublin
  • Diploma in Professional Regulation, 2018, University College Dublin 
Professional Memberships

Member of the International Association for the Protection of Intellectual Property (AIPPI) and the International Trade Mark Association (INTA). Ronan has been a member of the Law Society’s Litigation Committee for a number of years.