Insurance
Brazil
2 years ranked
LAWYER PROFILE
Guilherme Valdetaro Mathias
Global 2026
Ranked in 2 practice areas
About
Provided by Bermudes Advogados
Global
Practice Areas
Dispute Resolution: Civil law, contracts, regulatory law, tort, civil litigation, and arbitration.
Career
Litigation partner specialized in complex disputes involving real estate, insurance, corporate, commercial, and finance contracts, Guilherme is recognized as a leading litigator and recommended as an “efficient and hard-working lawyer” by Chambers.
Professional Memberships
Brazilian Bar Association (OAB/RJ, OAB/SP, OAB/DF).
Publications
Author of articles and chapter of books on dispute resolution matters published by Revista de Arbitragem e Mediação, Revista dos Tribunais, Revista do Direito da Energia, among others.
Personal
Partner at Sergio Bermudes Advogados since 1994.
Professor of Civil Law at PUC-Rio, FGV-Rio, Magistracy School of the Rio de Janeiro State Court of Justice (EMERJ), Fundação Escola Nacional de Seguros (FUNENSEG), State University of Rio de Janeiro (UERJ), and at the MBA Program in Business Law and MBA Program in Insurance Law at Fundação Getúlio Vargas (FGV-Rio).
LL.M in Civil Law from UERJ.
LL.B from Fluminense Federal University (UFF).
Chambers Review
Provided by Chambers
Chambers Global Guide
Insurance - Brazil
Band 4
Individual Editorial
Guilherme Valdetaro Mathias is a noteworthy lawyer with a history of working in strategic litigation matters before the superior courts. His knowledge and client service have been commended by the companies that work with him, especially those from the health insurance field.
Dispute Resolution: Litigation - Brazil
Band 5
Individual Editorial
Partner Guilherme Valdetaro Mathias dedicates his practice to litigation mandates, representing clients in corporate disputes, annulment of litigation settlement and contractual disputes.
Strengths
Provided by Chambers
Guilherme has a vast knowledge of the insurance market and extensive presence in the courts. He draws on past cases to enrich the discussions.
InsuranceChambers Global GuideGuilherme has experience and notorious knowledge in insurance matters. He has important achievements in the courts, combined with his strong partnership with clients.
InsuranceChambers Global GuideGuilherme is our safe haven. He is endowed with an outstanding technical skill that instills confidence in the most complex matters.
InsuranceChambers Global GuideGuilherme Valdetaro is an excellent professional, with great knowledge in civil law.
Dispute Resolution: LitigationChambers Global Guide
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