Mark Costello

Review Board Member | Solicitor

Expertise: Company and Commercial Law, Employment Law, Intellectual Property Law

Education: Trinity College Dublin, Northumbria University, Law Society of Ireland


  • Over 3 years of experience working as a solicitor in the Corporate and Commercial Department of a top 10 Irish law firm based in County Dublin.
  • Specializes in advising clients on complex issues related to commercial contracts and mergers & acquisitions (M&A); well-versed in contract negotiations, dispute resolution, transactional matters, and providing general commercial legal counsel.
  • Fully qualified to practice law as a solicitor in both Ireland and in England and Wales, having passed all necessary examinations and requirements in both jurisdictions, demonstrating expertise in Irish and English law.
  • Completed rigorous certified training programs in key specialty areas of law including a commercial mediation course focusing on alternative dispute resolution methods, an in-depth technology law course covering emerging issues like cybersecurity and internet governance, and a media and entertainment law course concentrating on defamation, social media, privacy and reporting regulations.


Mark is a solicitor based in County Dublin, Ireland. He works in the Corporate and Commercial Department of a top 10 Irish law firm, advising clients on commercial contracts and mergers & acquisitions. Prior to becoming a solicitor, Mark trained at the law firm for almost 3 years. He also worked as a paralegal conducting media law reviews and as a legal analyst on document review projects.


Mark earned a B.A. in English Literature & Philosophy from Trinity College Dublin. He later completed a Master of Laws (LLM) degree at Northumbria University. In addition, Mark has completed certifications in mediation, technology law, and media law through the Law Society of Ireland.

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