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Accolades
Testimonials
Collated independently by Legal 500 research team.
‘Great team led by Iria Calviño with unique expertise in the energy sector.’
‘It is a team with unique technical knowledge and a close-knit team that allows them to provide solutions to complex situations.’
‘They are commercial and look for practical solutions.’
‘Herbert's practice is characterised by its thoroughness and vast knowledge of the details of energy sector regulations, and in this sense by its ability to propose alternative ways to address problems to clients.’
‘José Ramon Mourenza is one of the leading figures in the sector and is always available to his clients. Esther Lumbreras is a rising lawyer with a high level of experience in administrative litigation.’
'Precise knowledge of administrative procedures and the general functioning of the public administration, not only from a theoretical but also from a practical approach.'
Key clients
- Asociación de Comercializadoras Independientes de Energía
- HidroCantábrico Distribución Eléctrica
- Finerge Europe
- Berkeley Minera España
- Verdalia Bioenergy Spain
- Grupo ASV
- Quercus Real Assets Limited
- Magnum Industrial Partners
- Asterion Industrial Partners
- Sociedade para o desenvolvemento de Proxectos Estratéxicos de Galicia
Work highlights
- Advised Ignis on contentious-administrative appeals against several Orders approved by the Ministry for the Ecological Transition and the Demographic Challenge establishing the operation remuneration for cogeneration plants from 1 July 2022 to 31 December 2022.
- Advising Berkeley Minera España on all the legal aspects related to its uranium mining projects in Spain.
- Advising Asociación de Comercializadoras Independientes de Energía on contentious-administrative appeals before Spanish Courts.
Lawyers
Next generation partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.

Practice head
Iria Calviño
Other key lawyers
José Ramón Mourenza; Esther Lumbreras