Mr Diarmaid Gavin > Ronan Daly Jermyn > Cork, Ireland > Lawyer Profile

Ronan Daly Jermyn
Diarmaid Gavin photo

Work Department

Corporate/M&A, IP, EU and Competition, and Commercial Contracts and Technology.


Diarmaid is a partner in the firm’s Corporate and Commercial Department advising a range of clients in different industry sectors on a broad range of corporate and commercial legal matters. He also leads the firm’s competition law and non-contentious IP practices.

On the transactional side, Diarmaid has acted for a number of clients in the agri-food, life sciences, technology and media sectors on M&A transactions, corporate group restructurings, joint ventures and equity fundraisings. His broader commercial law practice covers intellectual property licensing, outsourcing, competition law, commercial contracts and data protection. Particular areas of expertise include State-funded multilateral research collaborative projects between the academic and industry sectors where he is an established advisor on knowledge transfer interactions between industry and the research performing community in Ireland.

Diarmaid leads Ronan Daly Jermyn’s Brexit team, a cross-departmental team that advises clients on how to prepare for the impact of Brexit and seizing the opportunities it may bring.


Prior to joining Ronan Daly Jermyn, Diarmaid worked with a “magic circle” law firm in its London and Brussels offices where he advised 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.


Admitted as a solicitor in Ireland.


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)

Lawyer Rankings

Ireland > Intellectual property

Ronan Daly Jermyn‘s intellectual property practice is known for its work advising universities on IP matters related to their research, particularly IP forged through collaborative research arrangements with the private sector. The team’s client base in this area includes many of the most high-profile Irish universities. The group also advises private sector clients on contentious and non-contentious IP matters. The practice is jointly lead by Diarmaid Gavin, who focuses on non-contentious work, and litigator Darryl Broderick. Corporate partner JP Gilmartin assists with the IP aspects of transactions.

Ireland > Information technology

Ronan Daly Jermyn‘s technology practice handles work including M&A transactions and commercial contracts, both between businesses and with customers. The team is especially active in data protection work, including GDPR compliance and responses to data breaches. Gillian Keating leads the practice, in addition to heading up the firm’s corporate and commercial team. Diarmaid Gavin handles commercial transactions such as outsourcing as well as GDPR compliance.

Ireland > Healthcare and life sciences

Ronan Daly Jermyn provides ‘confident, pragmatic advice‘ on a range of matters in the healthcare and life sciences sectors, particularly medical negligence litigation and corporate transactions. Based across offices in Cork and Galway, the team is ideally positioned to advise multinational pharmaceutical and medical device companies located in the south and west of Ireland. In Galway, Padraic Brennan, Imelda Tierney and Fergal Dennehy specialise in healthcare litigation, while Cork-based Gillian Keating and Diarmaid Gavin focus on M&A, fundraisings, IP, and technology transfers and research agreements.

Ireland > EU and competition

Merger control is a key area of activity for the Cork-based competition team at Ronan Daly Jermyn, which also has considerable expertise in advising public bodies and educational institutions on state aid, particularly in relation to state-funded research, and procurement issues. The team also offers a dawn raid response service to clients in the south and west of Ireland. Diarmaid Gavin leads the practice.

Ireland > Commercial, corporate and M&A

Ronan Daly Jermyn has a strong multinational client base, particularly in the financial services, healthcare and technology sectors. The team is experienced in M&A and advises venture capital firms and private equity funds on investments. It also provides an online resource, RDJ Start-ups, designed to assist entrepreneur clients. In Cork, practice head Gillian Keating has particular expertise in M&A in the technology sector. Diarmaid Gavin is skilled in advising spin-out companies. Dublin-based practitioner Bryan McCarthy has particular expertise in the financial sector.

Ireland > Media and entertainment

Ronan Daly Jermyn acts for a range of Irish newspapers and media outlets in contentious litigation. The group has expertise defending against allegations of defamation, and also representing clients in judicial reviews of reporting restrictions. The team also handles corporate transactions and GDPR compliance in the media and entertainment space. Darryl Broderick and Diarmaid Gavin lead the team, with Broderick focused on litigation and Gavin handling non-contentious matters.