RDJ LLP has a proven track record in the tech, renewables, life sciences, commercial contracts, IP and data protection spaces, handling mid-market strategic M&A transactions, private equity issues and venture capital investments. Leading the group is Diarmaid Gavin, who is recommended for his ‘excellent knowledge and negotiation skills’ and is a key name for domestic and international corporate clients on cross-border transactions, capital raises and corporate restructurings. Bryan McCarthy is particularly impressive in high-value cross-border M&A mandates, including sales and acquisitions, capital raises and corporate restructurings. Gillian Keating frequently acts on M&A deals in the tech, renewables and healthcare space, with a niche specialism in M&A transactions for scaling businesses. In Galway, JP Gilmartin handles high-value M&A, and equity and debt fundraisings.
Legal 500 Editorial commentary

Testimonials

Collated independently by Legal 500 research team.

  • ‘Diarmaid Gavin has excellent knowledge and negotiation skills.’
  • ‘Specific stand-out partners we deal with are Marie Gavin and Conor Moran for their professionalism, depth of experience, ability to negotiate and get their point across when required and commitment to delivering a quality service on time.’
  • ‘The Teams strengths first and foremost is that you can have total confidence in the legal advice/guidance you are given. From my experience, the practice has strong individuals that cover the legalities, and separately they have resources that veer more to the practical/business end. The firm will listen to the client's wants and needs and, rather than lecture, will engage to get the best outcome. To me, it's all about people, and they have a strong depth of experience and match that experience to the requirement.’
  • ‘I have worked with Gillian Keating, Sean O'Reilly, Mark Barrett and Brendan Cunningham in the main and each one stands as exceptional in how they evaluate each issue, give their guidance from a legal perspective but importantly, engage with you in a business sense to keep the issue pragmatic and rather than reacting to issues, take a proactive stance together with a 'can do' attitude to deliver to your best interests.'
  • ‘RDJ LLP’s commercial, corporate and M&A team consistently delivers exceptional legal and strategic support, combining deep technical expertise with a pragmatic, client-first approach. What sets this practice apart is its ability to navigate complex transactions with clarity, precision, and commercial insight, ensuring that clients feel supported and empowered throughout every stage of the process.'
  • ‘I have had the pleasure of working with Michael Quinlan and Ashling Walsh and can confidently say that their exceptional hard work, professionalism, and integrity set them apart.’

Key clients

  • Wisetek
  • Neurent Medical
  • EEW
  • Fattal Hotel Group
  • Loci Orthopaedics
  • Biomimetic Innovations
  • Zerve
  • Nua Surgical
  • Carbon Chemicals Group
  • Org Group
  • OIA

Work highlights

Advised Carbon Chemicals Group on its acquisition by Shrieve Chemical Company.
Advised Wisetek on its acquisition by global information management services company, Iron Mountain.
Advised Neurent Medical on a €25m Series B financing extension.
Practice head

Diarmaid Gavin

Other key lawyers

Bryan McCarthy; Gillian Keating; JP Gilmartin; Michael Quinlan; Ashling Walsh; Marie Gavin; Conor Moran; Sean O'Reilly; Mark Barrett; Brendan Cunningham