
Demonstrating ‘exceptional market and industry knowledge’, the energy, natural resources, and utilities group at Matheson LLP acts for leading domestic bodies and major multinational clients on innovative development and transactional mandates. Practice head Garret Farrelly is highly active in the space, assisting with project development and finance, commercial and offtake agreements, and regulatory matters for leading offtakers, operators, developers, and public bodies. Conor Blennerhassett is an expert advisor to energy developers and investors on development, finance, and M&A mandates across the wind, solar, and gas segments. Other experts include Nicola Dunleavy, who represents clients in energy sector disputes, and Ruadhán Kenny, who assists in commercial litigation concerning energy and infrastructure projects.
Testimonials
Collated independently by Legal 500 research team.
‘The team is up-to-date on all matters in relation to the energy and natural resources practice. From the initial kick off of a project, they guide us all along, are available when required and are very informative on how to resolve issues and get aspects done smoothly and fast.’
‘Matheson creates an intimate environment, with a front-line team which takes the time to get to know the client and business.'
‘The team at Matheson has exceptional market and industry knowledge and is able to apply experience from working on a very impressive range of projects and transactions in the energy sector.’
‘Great experience working with Matheson on a large-scale due diligence. Their input and communication was top notch and at the level of large international law firms.’
‘Excellent team, very-well informed in energy law.’
‘Garret Farrelly is the standout legal advisor in the Irish energy market. Having worked with him for many years, we have first-hand experience of the deep level of knowledge and experience he can bring to clients and to transactions.’
‘Matheson provides a personalised service. Conor Blennerhassett is always available and systematically provides his thoughts, advice, and confirmation.'
‘Owen Collins and Caragh McCool are both excellent, dependable and extremely well informed.’
Key clients
- Allianz Capital Partners
- Amarenco
- AMP Capital Investors
- An Post
- Antin Infrastructure
- Aramark Corporation
- Aviva Investors
- AXA Master Partners in Infrastructure Equity 1 SA
- Axpo
- BASF
- BBVA
- BL Energy Ventures Ltd
- Bord na Móna
- Boston Scientific
- Brookfield Multiplex Construction
- Burmeister & Wain Scandinavian Contractor A / S
- Capital Dynamics
- Caterpillar Inc
- Celtic Horizon Offshore Wind Farm Limited
- Cenergise
- CGN Europe Energy
- Clearvise AG
- Close Brothers
- CNOOC Petroleum
- Coillte Teoranta
- Commission for Regulation of Utilities
- Credit Agricole
- Crowley Carbon
- Celtic Horizon Offshore Wind Farm Limited
- DBS Bank Ltd
- Department of the Environment, Climate and Communications
- DNB Bank ASA
- Dragados
- Drogheda Port Company
- Drumnahough Wind Farm DAC
- Dublin Waste to Energy
- DZ Bank
- e|net
- Ecopower Limited
- EDF Renewables Ireland Limited
- Eiffage Energia Ireland Limited
- EirGrid Interconnector DAC
- EirGrid plc
- Elecnor
- ElectroRoute
- Encavis
- Energia Renewables ROI Limited
- Energia Solar Holdings Ltd
- ENGIE SA
- EngineNode Limited
- Equinix
- Equitix Holdings Limited
- Erova Energy
- Export Development Canada
- First Quantum Minerals Limited
- First Reserve (part of Blackrock)
- Flogas
- Fred Olsen Renewables
- FuturEnergy Ireland
- GE Capital
- General Electric Company
- Glenough Wind Farm
- GLIL Infrastructure LLP
- GMC Utilities Group Limited
- Greencells GMBH
- Hamburg Commercial Bank
- Hanwha Corporation
- Helios Technology Ltd
- Hess LNG
- Hewlett-Packard
- Highfield Solar
- IB Vogt GmbH
- Iberdrola
- Indaver Ireland Limited
- ING Bank
- Inis Offshore
- Intesa Sanpaolo
- Iridium Concesiones de Infrastructuras, S.A.
- Irving Oil Ltd
- JCD Group
- JJ Rhatigan Unlimited Company
- John Laing
- John Sisk & Son Limited
- Kajima Partnerships
- KFW IPEX-Bank
- Landis + Gyr
- Liffey Meats
- Lufthansa Cargo AG
- Macquarie
- Mainstream Renewable Power Limited
- Metlen Energy and Metals (Metka-Egn Limited)
- Microsoft Corporation
- MUFG Bank
- Natwest Markets PLC
- Nexen Energy ULC
- Nexen Petroleum UK Ltd
- NFE Management LLC
- NGET/SPT Upgrades Limited (part of National Grid)
- Ocean Winds Ireland Limited
- Octopus Renewables
- Octopus Energy Generation Limited
- OHLA
- Ørsted (formerly Brookfield Renewable Ireland Limited)
- Partners Group (UK) Ltd
- Pat Smith Engineering Limited t/a PSE Power
- Rabobank
- Ratio Petroleum Ltd
- Real Assets Investment Management
- Roche Diagnostics Limited
- Roscommon County Council
- Rubicon Capital Advisors
- Sacyr
- Saorgus Energy Limited
- Seaway 7 UK Limited
- Shannon LNG
- Sisk Group
- Smart Wires, Inc
- Smartest Energy Ltd
- SMBC
- SSE plc
- Statkraft Ireland
- STEAG Solar Energy Solutions
- Storm Management NV
- Sunoco Bantry Bay Terminal Limited
- Sure Partners Limited
- Terraform Power Inc
- The Go-Ahead Group plc
- The Ireland Strategic Investment Fund (ISIF)
- TotalEnergies Renewables SAS
- Tynagh Energy Limited
- Ulster Bank
- Uniper Renewables GmbH
- Vermilion Energy Inc
- Woodside Energy
- Zenith Energy
Work highlights
- Advising EirGrid in relation to the drafting and development of its new offshore connection agreements, which will be used to connect all offshore wind projects in Ireland.
- Advised Irish solar developer Highfield, in a joint venture with German developer IBV, on the sale of two large solar farms (over 200 MWp).
- Advising Bord na Móna on a number of significant and high-profile projects, including its strategic partnership with Amazon to develop an eco energy park in the Midlands and the project financing of the 105 MW Derrinlough Wind Farm.
Lawyers

Practice head
The lawyer(s) leading their teams.
Garret Farrelly