Guillermo Gracia Mauleón - Associate - Public and Regulatory - Energy and Natural Resources - Fieldfisher Spain | Fieldfisher
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Professional background

Professional background

I am a lawyer in the Public and Regulatory Law Department at Fieldfisher’s Madrid office. Prior to joining the firm, I worked at a well-known Spanish law firm specialising in the same practice area.

I have extensive experience advising national and international companies on administrative and contentious-administrative proceedings before all types of public sector entities. My practice focuses particularly on public procurement, urban planning, environmental law, and all regulated sectors, with a special emphasis on energy and natural resources.

I hold an Executive Programme in Public Procurement from the University of Deusto, as well as a Law Degree and a Master’s in Access to the Legal Profession from the University of Zaragoza. I also prepared for the entrance examinations to join the Legal Corps of the Spanish Ministry of Defence.

Authored pieces

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A rooftop covered with solar panels and green grass overlooks a city skyline with modern skyscrapers. Wind turbines are visible in the background under a blue sky with scattered clouds, highlighting renewable energy sources in an urban setting.
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Capacity market: Order TED/966/2026 establishes the new firmness mechanism for the peninsular electricity system

18.09.2026
The Ministry for Ecological Transition and the Demographic Challenge has approved Order TED/966/2026, dated 15 September, which establishes a capacity market for the Spanish peninsular electricity system. The regulation comes into force on 18 September 2026 and establishes a centralised competitive bidding mechanism to ensure the availability of firm capacity and strengthen security of supply.
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A double exposure image featuring a person in a suit holding a glowing light in their hand, superimposed with a landscape of wind turbines at sunset, symbolizing the connection between business and renewable energy.
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Royal Decree-Law 7/2026: preview of the new regulatory package for renewable energy

24.03.2026
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A large industrial pipeline extends over calm waters towards a distant refinery with multiple smokestacks emitting smoke. The sky is a gradient of purple and pink hues, suggesting either dawn or dusk, and the scene is bathed in a soft, diffused light.
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Update on the new provisions of Royal Decree-Law 7/2026 for the gas and hydrocarbon sector

23.03.2026
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New General Regulations on Electricity Supply and Contracting and Other New Developments in RD 88/2026

12.02.2026
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