Guillermo Sánchez de Miquel has been a principal associate in Garrigues’ Administrative Law Department since 2020, after joining the firm in 2013.

He has a wealth of experience in all aspects of EU and antitrust law. In particular, Guillermo regularly participates in:

• Administrative and judicial review proceedings related to cartels and national and international breaches of antitrust law.
• Merger filings before the national and European antitrust authorities.
• Analysis of vertical and horizontal agreements.
• Compliance and internal training processes for companies in connection with antitrust law.
• Cases involving state aid and subsidies.

Guillermo also has vast experience in all the different areas of administrative law, in judicial review proceedings and planning and zoning law. He provides recurring advice both to private and public entities in all types of proceedings before the public authorities, in administrative proceedings and judicial review appeals. In relation to planning and zoning law, he regularly participates in:

• Judicial review appeals involving planning and zoning.
• Infringement proceedings and proceedings to restore planning and zoning compliance.
• Drafting, providing advice on and processing of planning instruments.
• Drafting, providing advice on and processing of zoning management instruments (reallotment plans etc.).
• Planning and zoning due diligence reviews.

He also provides ongoing advice in all these fields, mainly though continuous analysis according to each client’s needs, providing strategic preventive and reactive bespoke advice to clients.

• Law degree, Universidad Pompeu Fabra, Barcelona.
• Law degree, Università degli Studi Roma Tre, Rome.
• Master’s Degree in Access to the Legal Profession, Universidad Pompeu Fabra, majoring in public law.

Guillermo has been an associate lecturer in the Administrative Law Department of the Law Faculty of Universidad de Barcelona (UB) since 2019, where he teaches the module: “Legal Regime and Common Administrative Procedure”.

Since 2022, he has also been an associate lecturer at Instituto Superior de Derecho y Empresa (ISDE), where he teaches "Procedural Law in the European Union" in the Master’s Degree in International Legal Practice and Business.

Guillermo also teaches Antitrust law in the Master’s Degree on public procurement at Universidad de Barcelona.

Guillermo Sánchez de Miquel is a member of the Barcelona Bar Association (ICAB) and of the Spanish Antitrust Association (AEDC). 

Guillermo has been included in the "Ones to Watch in Spain 2024" list by "Best Lawyers", in the category Administrative Law.