In the Chambers and Partners Latin America Guide 2026, Three Crowns has maintained its Band 3 ranking for International Arbitration. The market-leading directory affirms our team as “technically outstanding”, “pragmatic and smart”, with “deep knowledge of the Latin America region.”
Alongside the department recognition, three of our lawyers were individually ranked.
Gaëtan Verhoosel KC maintains his Band 3 position, with Chambers commending him as “an excellent lawyer and team leader”.
Carmen Martinez Lopez also maintains her Band 3 ranking, with the directory noting her as “an exceptionally sophisticated lawyer who combines deep jurisdictional expertise with a keen commercial understanding” consistently delivering “an outstanding client service”.
Agustin G. Sanz this year sees an elevated ranking securing Band 4. Possessing a highly active international arbitration practice relating to disputes across Latin America, his expertise attracts widespread praise from market commentators. He is noted as a “client-orientated lawyer” with “thorough knowledge” of international arbitration.
ABOUT GAËTAN VERHOOSEL KC
Gaëtan is a founding partner of Three Crowns. He has close to 25 years of experience serving as advocate or arbitrator in both commercial and investment treaty arbitrations.
Gaëtan is a past Senior Co-Chair of the Arbitration Committee of the International Bar Association. He presently serves as a member of the SIAC Court of Arbitration and was appointed by the Kingdom of Belgium to the ICSID Panel of Arbitrators. He teaches investment treaty law at King’s College School of Law in London and has taught the same subject at Columbia Law School in New York.
ABOUT CARMEN MARTINEZ LOPEZ
Carmen, a partner in the Madrid office, has appeared as advocate in numerous investment treaty and commercial arbitrations. She has handled arbitrations under the rules of the major arbitral institutions and ad hoc across a variety of jurisdictions, with a particular focus on Latin America and Spain. Carmen also sits as arbitrator.
Carmen serves in a variety of leadership positions, including as the President of the British Chapter of the Spanish Arbitration Club (Club Español del Arbitraje), a member of the Arbitrator Appointment Committee of the Madrid Arbitration Court, and a team leader for the IBA Task Force for the Revision of the 2010 IBA Rules on the Taking of Evidence. Carmen writes and speaks regularly on arbitration-related issues.
ABOUT AGUSTIN G. SANZ
Agustin is a partner in the Madrid office. He has been trained in the civil law and common law traditions and has extensive experience of both international commercial and investment treaty arbitration.
He has experience under all of the major arbitral institutions, and ad hoc, across several jurisdictions, with a particular focus on Latin America, covering a broad range of sectors including infrastructure, energy, oil & gas, public contracts, and regulated industries.
Agustin also has extensive experience advising international clients in connection with local administrative and court proceedings, settlement negotiations and contract renegotiations in the context of major disputes in Latin America. Agustin also sits as arbitrator.