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Garret Farrelly

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Work Department

Partner and Head of Energy and Infrastructure Group


Garret is a partner and head of the Energy and Infrastructure Group in Matheson. He advises on all aspects of projects and project financing, from PPPs to privately-financed electricity, oil and gas field developments and privatisations as well as electricity, gas and telecommunications network infrastructure. Garret’s experience includes electricity and gas market regulation and trading, project development, M&A and financing in the conventional and renewable electricity sectors as well as the mining and upstream / downstream oil and gas sectors. Garret has extensive experience in the renewables sphere (with a particular focus on wind farms) having advised on the financing, sale and purchase of onshore and offshore wind farms in Ireland, Great Britain and Europe.

Garret is a frequent speaker at Energy and Natural Resources conferences and regularly contributes articles to specialist publications.  Garret is listed in Energy Ireland’s "Who's Who in Irish Energy"  (Energy Ireland Yearbook 2019).


University College Dublin (BCL) Qualified as a Solicitor in England and Wales, 2012 (practising)


Energy and natural resources

Within: Leading individuals

Garret Farrelly - Matheson

Within: Energy and natural resources

Providing 'sound advice', Matheson is very strong in the electricity sector, which is evidenced by practice head Garret Farrelly acting for General Electric on the first corporate power purchase agreement concluded between a wind farm generation company and a subsidiary of Microsoft. Farrelly also provided comprehensive advice to EirGrid and Soni on the new integrated single electricity market. The 'approachable' team, which is 'available at any time', also has expertise in respect of oil and gas M&A transactions, including regulatory advice; it advised Vermilion Energy on its acquisition of Shell E&P Ireland with Canada Pension Plan Investment Board. Senior associate Elizabeth McCann is another key team member.

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Projects and PPP

Within: Leading individuals

Garret Farrelly - Matheson

Within: Projects and PPP

Owing to its ‘high level of knowledge and proactive approach’, the team at Matheson continues to receive high-profile instructions. Practice head Garret Farrelly is advising successful bidder CLH Aviación on a long-term services concession agreement pertaining to the design, build and operation of new fuel farm tanks at Dublin Airport. Farrelly is also part of the team that is advising Irving Oil on its acquisition of Tedcastles Oil Products. Peter O’Brien is also a key team member.

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Public sector

Within: Public sector

Matheson's practice counts a number of public bodies among its clients, and advises on state aid, public inquiries and statutory investigations, freedom of information law, energy and infrastructure projects, and environmental and planning issues, among other matters. Michael Byrne is acting for the Adoption Authority of Ireland in a rare "leap-frog" appeal to the Supreme Court in a case concerning the recognition of foreign adoptions; Helen Kelly is advising a state-owned organisation on the state aid aspects of its receipt of a €30m government loan; and Garret Farrelly is advising EirGrid and Soni on the new wholesale electricity market arrangement for Ireland and Northern Ireland. Nicola Dunleavy is also noted.

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Within: Transport

Matheson's practice is particularly active in the aviation, maritime and infrastructure sectors, and is noted for its regulatory advice on transport matters. Stuart Kennedy and Rory McPhillips specialise in advising on the financing and leasing of aircraft and other transportation asset classes. Infrastructure expert Garret Farrelly assisted with the Greystones Harbour and Marina mixed-use development and advised a machinery and equipment company on a tender for a proposed locomotive overhaul project by Irish Rail.

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