
McCann FitzGerald LLP is renowned for its comprehensive expertise in the telecoms sector, handling contentious, regulatory, and transactional matters for a diverse client base. The team is well-versed in both contentious and non-contentious issues, with a particular focus on competition aspects of transactions, including acquisitions and joint ventures. The contentious telecoms practice, led by Rosaleen Byrne, Amy Brick, and Catherine Derrig, frequently represents clients in Commercial Court proceedings. On the regulatory and transactional side, David Lydon and Garreth O’Brien provide administrative and corporate law advice to domestic and international clients. Laura Treacy brings significant expertise in telecoms regulation, advising on licensing, interconnection, spectrum allocation, and infrastructure access.
Testimonials
Collated independently by Legal 500 research team.
- ‘Every member of the McCanns team is a leader in their field and brings their unique skills to each issue encountered. There is a sense of collaboration involved in each project due to the easy lines of communication.’
- ‘Rosaleen Byrne is an exceptional lawyer with unparalleled litigation experience and expertise. Her communication skills set her apart, and she ensures that we have easy access to her and her team. Her advice and guidance are always very much appreciated.’
Key clients
- ComReg
- Vodafone
- Nostra
- AMP Capital Investors (UK) Limited
- ESB
- Cordiant Digital Infrastructure
Work highlights
- Represented ComReg in a successful and high profile application to the commercial list of the Irish High Court.
- Represented ComReg in High Court proceedings arising from an enforcement action taken against Eircom Limited.
- Advised AMP Capital Investors (UK) Limited on the sale of Towercom Limited by AMP as infrastructure manager of the Irish Infrastructure Fund.
Lawyers

Practice head
The lawyer(s) leading their teams.
Rosaleen Byrne, Catherine Derrig, Laura Treacy, David Lydon, Garreth O’Brien, Amy Brick