Javier Guillén
About Javier Guillén
Javier Guillén is a lawyer based in Madrid, ES and has been recognized in The Best Lawyers in Spain™ since 2020. Javier Guillén is recognized in the following practice areas:
- Madrid, Spain
- Administrative Law
- Competition / Antitrust Law
- Energy Law
Current Firm: Herbert Smith Freehills Kramer LLP
Location: Madrid, ES
It takes just a few minutes to optimize your profile for clients looking to engage and lawyers who are ready to refer.
Activate your profile and highlight why your peers recognized in Best Lawyers today.
Nearby Lawyers
Rafael after more than 30 años in PwC Tax and Legal as a Partner, in particular specialized in the Life Science sector, has joined VCBiolaw as a Tax partner to strengthen and expand the capabilities of our firm. Rafael has a degree in Law and Economics and Business Administration from the University Pontificia Comillas-ICADE (E-3). He is Post graduated in European Community Law and member of the Madrid Bar Association. He has been recognized by the Best Lawyers directory in Tax Law. He...
After five years as an associate at Estudio Legal (1987-1992), where he acquired experience in corporate, banking, capital markets and competition, he co-founded Araoz & Rueda in 1994. Since then, he has developed his practice advising in general corporate and commercial matters and, especially, in Mergers and Acquisitions and Capital Markets, where he has extensive experience. Furthermore, he regularly advises in litigation and restructuring/insolvency matters.
Pablo se incorporó en 1997 a PwC Tax & Legal Services y es actualmente responsable del asesoramiento jurídico en la unidad de Empresa Familiar de PwC, tras haber desarrollado su carrera profesional en los departamentos de Derecho Procesal y Transacciones. Especializado en derecho privado, tanto mercantil como civil, tiene una gran experiencia en operaciones de M&A, reestructuraciones societarias, amplio asesoramiento a socios y accionistas, incluyendo litigios en la juri...
Licenciada en Derecho por la Universidad Pontificia de Comillas (ICADE) desde 1994 y, además, María se cualificó como Solicitor of England & Wales en 1998. Con más de 15 años de experiencia, es especialista en asesoramiento laboral integral a empresas tanto desde un punto de vista del derecho nacional como en asuntos laborales y de Seguridad Social con componente internacional. También tiene amplia experiencia en el ámbito de las Transaccio...
Pedro Rueda was an associate in the Department of Mergers and Acquisitions at Gómez-Acebo & Pombo (Madrid, 1987-1994), where he was promoted to partner in 1994, after having spent one year as a foreign associate in the Department of Mergers and Acquisitions at Skadden, Arps, Slate, Meagher & Flom, New York. In 1994 he co-founded Araoz & Rueda and since then he has developed his practice in the area of Mergers and Acquisitions, where he has extensive experience in advising a...
Pedro Alonso Rodríguez is a top attorney recognized by Best Lawyers in the practice area(s) of Labor and Employment Law. Pedro, who practices law in Madrid, Spain, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Pedro is held by other top lawyers in the same geographic and legal practice area.
Gabriel Fernández Rojas is a top attorney recognized by Best Lawyers in the practice area(s) of Administrative Law. Gabriel, who practices law in Madrid, Spain, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Gabriel is held by other top lawyers in the same geographic and legal practice area.
José Amérigo Alonso is a top attorney recognized by Best Lawyers in the practice area(s) of Administrative Law. José Amérigo, who practices law in Madrid, Spain, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which José Amérigo is held by other top lawyers in the same geographic and legal practice area.
Partner of the Tax Department of Crowe Legal y Tributario since April 2020 and responsible for the Madrid office. She has 20 years of experience in the practice of law. She began her professional career as a lawyer specializing in the field of tax advice in 2002 at Cuatrecasas in Barcelona; in 2006 she joined KPMG and in 2008 PwC, where she was appointed partner in 2017. In 2022 she joined Crowe as Partner of the Tax Area and head of the Madrid office of Crowe Legal y Tributario. Elena has an...
Explore and Learn
The Family Law Loophole That Lets Sex Offenders Parent Kids
by Bryan Driscoll
Is the state's surrogacy framework putting children at risk?
Unenforceable HOA Rules: What Homeowners Can Do About Illegal HOA Actions
by Bryan Driscoll
Not every HOA rule is legal. Learn how to recognize and fight unenforceable HOA rules that overstep the law.
Best Lawyers 2026: Discover the Honorees in Brazil, Mexico, Portugal, South Africa and Spain
by Jamilla Tabbara
A growing international network of recognized legal professionals.
Holiday Pay Explained: Federal Rules and Employer Policies
by Bryan Driscoll
Understand how paid holidays work, when employers must follow their policies and when legal guidance may be necessary.
Can a Green Card Be Revoked?
by Bryan Driscoll
Revocation requires a legal basis, notice and the chance to respond before status can be taken away.
What Is the Difference Between a Will and a Living Trust?
by Bryan Driscoll
A practical guide to wills, living trusts and how to choose the right plan for your estate.
US Tariff Uncertainty Throws Canada Into Legal Purgatory
by Bryan Driscoll
The message is clear: There is no returning to pre-2025 normalcy.
New Texas Family Laws Transform Navigating Divorce, Custody
by Bryan Driscoll
Reforms are sweeping, philosophically distinct and designed to change the way families operate.
The 2026 Best Lawyers Awards in Chile, Colombia and Puerto Rico
by Jamilla Tabbara
The region’s most highly regarded lawyers.