With particular expertise in complex renewable energy transactions and projects, Mason Hayes & Curran LLP‘s team is highly capable across the project finance, development, acquisition and operation of thermal and renewable electricity generation and storage systems. It also has experience acting on electricity and natural gas network regulatory matters and representing generators in energy disputes. Eoin Cassidy leads the energy team, with extensive experience acting for developers, investors and funders on energy project developments, financings, acquisitions and disposals. Construction team head Rory Kirrane SC’s broad practice covers regulatory, contentious and project matters related to capacity and supply issues. David Gunn and Hannah Devoy are other key practitioners.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘Mason Hayes & Curran LLP consistently demonstrates deep sectoral expertise and a practical, solutions-focused approach, supporting everything from large-scale infrastructure projects to day-to-day operational issues.'
- ‘Rory Kirrane and Hannah Devoy are brilliant lawyers - the team is a force to be reckoned with.’
- ‘Eoin Cassidy and David Gunn are standout advisers who consistently bring commercial clarity, legal precision, and exceptional responsiveness to every engagement. Their deep understanding of the energy and infrastructure sectors is matched by a pragmatic, business-focused approach that adds real value.'
- ‘Comprehensive expertise across the energy value chain and markets with strong regulatory insights. The team is overall well placed in the industry, shows commercial acumen, and pragmatism to get things done in challenging timelines.’
- ‘Eoin Cassidy is excellent on all fronts. Driven and commercially sensible, good view of the overall picture for us as investors, and proactive on many relevant topics.’
- ‘Strong mix of experience with blue chip clients, regulators, public bodies and government. Very strong cross-over with other firm strengths, such as procurement, competition and planning, which allows 360-degree client service.’
- ‘Rory Kirrane is a super smooth street-fighter who goes all the way for his clients and is technically very sound.’
Key clients
- Lirion Power
- CommerzReal
- SSE
- Norddeutsche Landesbank Girozentrale
- EirGrid plc
- EDF Renewables
- ib vogt
- Highfield Solar
- Statkraft Ireland
- Elgin Energy
- BayWa
- Greencoat Renewables
- Bord na Móna
- Centrica Business Solutions
- RWE Renewables Ireland
- Impax Asset Management Group
- FuturEnergy Ireland
- Energia
- Amarenco Solar Ireland
- Société Générale
Work highlights
Advised Commerz Real on its acquisition of Moanvane wind farm comprising of 12 Nordex turbines with an energy capacity of 60MW through Luxembourg-based klimaVest fund.
Advised HitecVision and Reinova Partners on the launch of Lirion Power and its acquisition of six operational onshore wind assets from Greencoat Renewables plc.
Advising SSE on all aspects of the offshore lease, consenting, development and procurement of Phase II of the Arklow Bank Wind Farm with a projected capacity of 800MW
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Practice head
Eoin Cassidy
Other key lawyers
Rory Kirrane SC; Hannah Devoy; Deirdre Nagle; Rob McDwyer; Grainne Tiernan; David Gunn