80 Diarmaid Gavin 1195x730

Diarmaid Gavin

Partner, Cork Office

Diarmaid is a Partner, practising across the area of Corporate and Commercial and leading our EU & Competition and Research Innovation and Technology practices. He brings a dynamic blend of expertise to the role across a range of commercial transactions, from technology and outsourcing projects to intellectual property and research and development arrangements, as well as advising on mergers and acquisitions, corporate group restructurings, joint ventures and investment transactions. Diarmaid also advises private and public sector clients on a variety of competition law matters including compliance, State Aid and merger control. With expansive insights across industries, Diarmaid delivers well-rounded and insightful solutions to clients.

In addition, Diarmaid is an established advisor on knowledge transfer interactions between industry and the research performing community. Advising Knowledge Transfer Ireland, as well as a number of Irish universities and companies, his particular expertise includes State-funded multilateral research collaborative projects between academia and industry, enabling knowledge transfer that empowers focused impact. Diarmaid has also advised extensively on IP licensing arrangements and corporate transactions, such as group restructurings, investments and mergers and acquisitions for technology and IP-focused companies.

Prior to joining RDJ, Diarmaid worked with a Magic Circle law firm in London and Brussels, advising on merger notifications before the European Commission and the UK Office of Fair Trading (now the Competition and Markets Authority) as well as on cartel and abuse of dominance cases.


  • Advising Capstone Financial Services (t/a Pet Insure) on its acquisition by Agria Djurförsäkring
  • Advising Focus Scientific Solutions on its acquisition by scientific and medical solutions firm Lennox.
  • Advising Genesis Healthcare Automation on a marketing and development collaboration with Stryker Surgical Technologies.
  • Advising O’Leary Insurances on its sale to Brown & Brown (NYSE: BRO), the sixth largest independent broker in the US.
  • Lead advisor to a number of Irish Universities on intellectual property and research contract matters.
  • Advising Knowledge Transfer Ireland on the development of its model collaborative research and joint ownership management agreements, a consortium agreement for the Disruptive Technology Innovation Fund and a its practical guide for directors and observers and on State aid considerations in research, development and innovation collaborations.


University of Dublin, Trinity College (LLB)
Collège d'Europe, Bruges (LLM in Advanced European Law)
Oxford Institute of Legal Practice (Diploma in Professional Legal Studies)


Admitted as a solicitor in Ireland.

Diarmaid Gavin is very experienced in his sector and dealing with the CCPC, he can navigate a transaction through all the requirements. A client needs a skilled pair of hands in engaging with the CCPC and Diarmaid delivers that.
– The Legal 500 (2023)
a leading practitioner in his area who will give you well-informed, objective advice. He knows the terrain very well and saves clients material time as a result.
– The Legal 500 (2022)
Diarmaid's attention to detail and meticulous manner made for a smooth journey through the transaction, despite repeated challenges cropping up throughout.
– The Legal 500
Has an in-depth knowledge of our business. He is very matter of fact and upfront about what is going on.
– Chambers Europe