Europe Guide 2026 : Ireland
Ranked Individuals
Provided by Mason Hayes & Curran LLP
We have advised on some of the largest Irish energy transactions in recent years. Notably, the combined generation capacity of our renewable energy projects in Ireland represents almost half of the total amount installed on the Irish grid.
Energy developments are complex and clients rely on us to identify risk early on to manage the project life cycle. We are also regularly involved in the acquisition and disposal of projects. We are renowned in the sector for our exemplary work on transactional, developmental and regulatory issues.
Our lawyers offer the most comprehensive suite of legal services available to the Irish energy market in both renewable and traditional sectors. Known for our responsive and commercial approach we quickly react to changes in the market, policy and regulation. We ensure that our clients are always ahead of the energy curve.
We advise clients in the following areas:
Provided by Chambers
Mason Hayes & Curran has a top-tier energy department that assists a broad range of clients with wind farm and solar park transactions. The firm is also highly active in project finance and development mandates. The lawyers have additional knowledge of regulatory topics and often assist with power purchase agreements. Team members often act for clients on judicial reviews and planning application mandates.
Provided by Chambers
Mason Hayes & Curran acted for HitecVision and Reinova Partners on the launch of Lirion Power, a new Irish renewable energy platform, and on the subsequent acquisition of six onshore wind farm projects.
Provided by Chambers
The firm's ability to provide complex services with a cohesive, blended team that is appropriately resourced, enables it to provide excellent responsiveness and service levels.
Mason Hayes is a super responsive team that communicates clearly, avoids jargon, and is accessible.
The team at Mason Hayes & Curran is proactive, pragmatic and commercial.
The work the team delivers is always spot on and provided with quick turnaround times.
The firm provides really top notch work and has spot on instincts.
Provided by Chambers
Eoin Cassidy is a really strategic lawyer with exceptional industry knowledge.
Eoin is very experienced in the renewable energy industry in Ireland and understands where value can be negotiated and what level of risk is acceptable for parties to agree to.
He is as good as anyone in the market and is very experienced and knowledgeable.
Deirdre Nagle leads the planning and environment team at the firm, assisting clients with planning and licensing applications, as well as representing them in judicial reviews.
She has enormous knowledge of the planning system in Ireland and provides critically important advice to assist in the consenting process, de-risking developments at an early stage.
Deirdre Nagle is someone who eats, sleeps and breathes the most recent developments in planning and that gives extraordinary comfort to clients.
Deirdre Nagle is responsive and a real expert.
Jay Sattin acts for a prominent roster of clients in the energy, healthcare and utilities sectors on contentious and advisory planning matters. He has additional experience assisting clients with EU environmental regulations.
Jay Sattin is an excellent communicator who understands and addresses the client's needs quietly and effectively.
Jay Sattin is approachable, responsible and clear in his communications. He is easy to work with, and his pre-existing knowledge of the area means that it is easy to quickly get to the key issue.
He is calm under pressure and can be relied on to manage client expectations.
Energy & Natural Resources
Energy & Natural Resources
Environment
Environment
Provided by Mason Hayes & Curran LLP
Rory Kirrane SC
Peter McLay
Eoin Cassidy
View profile of Eoin CassidyWilliam Carmody
View profile of William CarmodyJay Sattin
View profile of Jay SattinDeirdre Nagle
View profile of Deirdre Nagle
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