Garret is a partner and head of both Matheson’s Energy and Natural Resources Group and Projects and Infrastructure Group. Garret is also chair of Matheson's ESG Advisory Group. 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 specialises in particular in the areas of electricity and gas market regulation and trading. Garret’s experience also includes 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 is consistently listed as one of Ireland’s leading Energy lawyers, including in leading legal international directories such as Legal 500 and Chambers Europe. He is a frequent speaker at energy and infrastructure conferences and regularly contributes articles to specialist publications. Garret is listed in Energy Ireland’s "Who's Who in Irish Energy" (Energy Ireland Yearbook 2017, 2018 and 2019).