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Miguel Riano

Miguel Riaño

Managing partner

Miguel is the Madrid managing partner, specialising in energy, infrastructure, natural resources, environment and public law.



Miguel is the Madrid managing partner, specialising in energy, infrastructure, natural resources and environment. He has more than 20 years experience helping major corporations, global investment banks, equity sponsors and public entities with domestic and cross-border transactions. These include acquisitions, public tenders, project finance, privatisations and regulatory issues, as well as related litigation and arbitration matters. Miguel helps clients with deals in Spain and many other jurisdictions. 

Miguel´s experience includes advising: 

  • a Spanish consortium, including Abengoa, ACS Cobra, Indra Sistemas, OHL, Adif, Renfe and Patentes Talgo, among others, on all legal aspects of the construction and operation of the Haramain High-speed Railway project (HHR), linking Meca and Medina, the two holy cities in Saudi Arabia
  • The Kingdom of Spain on its defence on the claim of international arbitration of 25 investment funds based on the Energy Charter Treaty (regarding the new Photovoltaic Spanish legislation)
  • A Spanish energy company and a Japanese company, as sponsors, on the development and financing of a desalination project in Accra, Ghana
  • Inmet Mining Corporation on the development of the biggest copper mine project in Spain
  • Kohlberg Kravis Roberts & Co. (KKR) on its €417 million acquisition of a one-third stake in Acciona Energía International, a Spanish company which will focus on operating the renewables assets (wind and solar) of Acciona Group in Spain


His expertise in energy and natural resources, environment and projects is highlighted by his Band 2 ranking in Chambers Europe and Band 1 in Legal 500. He has also been ranked in Best Lawyers since 2010.
His clients remark that the "spectacular" Miguel Riaño "has an outstanding reputation in the energy sector", "on how quickly he understands their issues", while colleagues praise his “global vision of the infrastructure sector” and his “ability to understand the objectives of the client and provide feedback with added value”; others highlight that he is "a very well-known name with a great deal of experience" and "so quick, he knows what the issue is before you open your mouth", 'very business-oriented and a great strategist. He's an asset in negotiations."




Miguel joined Herbert Smith from the Madrid office of another international law firm, where he was head of the projects, energy and infrastructure practice, and co-head of the worldwide infrastructure sector. Prior to that, he was an international partner at Garrigues and a high-ranking civil servant of the Spanish Government, where he helped draft, develop and implement diverse water regulations. He speaks Spanish and English.