Carlos Roberto Siqueira Castro

• Strategic Litigation, Arbitration and Mediation
• Constitutional and Government Relations
• Administrative, Regulatory, Infrastructure Law and PPPs
• Oil and Gas
• Privatizations and Concessions
• Compliance, Integrity Programs and Corporate Ethics
• Plea Bargaining and Leniency Agreements

• Ph.D. in Public Law from the Federal University of Rio de Janeiro (UFRJ)
• Master of Laws (LL.M.) from the University of Michigan, USA
• Law degree from the State University of Rio de Janeiro (UERJ)
• Participant in the LSE Short Course on Regulation at The London School of Economics and Political Science (LSE)
• Participant in the Program on Negotiation and Advanced Mediation Workshop: Mediating Complex Disputes at Harvard Law School (HLS)
• Trained in Business Mediation by the France-Brazil Chamber of Commerce (CCFB)
• Certified Mediator by the Centre de Médiation et d’Arbitrage de Paris (CMAP)
• Advanced Mediation Training for Brazilian Lawyers by Mediation Works Incorporated (MWI) and the International Academic Institute of Mediation (IIAMA)
• Officer of the Mediation Committee, International Bar
• Languages: Portuguese, English, French and Spanish

• Retired Deputy Prosecutor General of the Republic (Federal Public Prosecutor’s Office)
• Advisor to the National Constituent Assembly
• Full Professor of Constitutional Law at the State University of Rio de Janeiro (UERJ)
• Full Professor of Constitutional Law at the Pontifical Catholic University of Rio de Janeiro (PUC-Rio)
• Habilitation (Livre-docência) in Constitutional Law from UERJ
• Retired Full Professor at the Faculty of Law of UERJ
• Former Visiting Professor at Harvard Law School, USA
• Former Visiting Professor at the Faculté de Droit, University of Montpellier, France
• Former State Secretary in various departments of the Government and Municipality of Rio de Janeiro, including Chief of Staff of the State Governor’s Office
• Former State Secretary of the Special Public Education Program (CIEPS)
• Former Chairman of the Legal Committee of the American Chamber of Commerce for Brazil – Rio de Janeiro chapter

Senior Partner and Lifetime Honorary Member of the Firm’s Executive Committee. As a longtime Federal Counselor of the Brazilian Bar Association (OAB), he was awarded the Rui Barbosa Medal in 2020, the highest honor in Brazilian advocacy. He is a specialist in Constitutional Law, Administrative Law, Regulatory Law, Public Procurement, Government Contracts, Public-Private Partnerships (PPPs), strategic litigation, Arbitration, and Mediation.​

He earned his Law degree from the State University of Rio de Janeiro (UERJ) in 1972, holds an LL.M. from the University of Michigan, and a Ph.D. in Public Law from the Federal University of Rio de Janeiro (UFRJ). He is the author of numerous books and legal articles on Public and Business Law, published both in Brazil and internationally. He is also a certified mediator by the Centre de Médiation et d’Arbitrage de Paris (CMAP).​

In his academic career, he served as a tenured professor of Constitutional Law at UERJ and the Pontifical Catholic University of Rio de Janeiro (PUC-Rio), and as a visiting professor at the Faculty of Law of Université Paris II – Panthéon-Assas.​

In public service, he played a prominent role as an advisor to the National Constituent Assembly responsible for drafting Brazil’s 1988 Federal Constitution. He also served as Deputy Attorney General of the Republic, concluding his career at the Federal Prosecution Office in 1997 after working before the Federal Supreme Court. He has held key government positions, including Secretary of State, Chief of Staff to the Governor of the State of Rio de Janeiro, and Secretary of Government for the City of Rio de Janeiro.

• Recognized by Chambers Latin America as one of Brazil’s leading lawyers in the areas of Dispute Resolution and Arbitration, and Aviation Law
• Recognized by Chambers Global as one of the best lawyers in the areas of Aviation and Dispute Resolution: Litigation (Brazil)
• Recognized by Análise Advocacia as one of the most admired lawyers in Brazil in the areas of Civil and Infrastructure/Regulatory Law
• Recognized by Análise Advocacia as one of the most admired lawyers in Brazil by companies in the following sectors: Sugar & Ethanol, Food & Beverage, Automotive & Auto Parts, Banking, Communications, Construction & Engineering, Education, Electronics, Electric Energy, Financial, Pension Funds, Machinery & Equipment, Oil & Gas, Specialized Services, and Telecommunications
• Recognized by The Legal 500 Latin America as one of Brazil’s top lawyers in the areas of Dispute Resolution, Public Law, Energy and Natural Resources – Electricity, and Energy and Natural Resources – Mining
• Recognized by Who’s Who Legal as one of Brazil’s leading litigation lawyers
• Recognized by Leaders League as one of Brazil’s top lawyers in Civil and Commercial Litigation and Arbitration
• Recognized by IFLR Energy and Infrastructure (IFLR1000) as one of the leading lawyers in Brazil in the areas of Energy and Infrastructure
• Recognized by Global Investigations Review (GIR) among the top 100 lawyers in the world in compliance, anti-corruption investigations, and white-collar crime
• Recognized by LACCA Approved as one of Brazil’s top lawyers in Administrative Law

CASTRO, Carlos Roberto Siqueira. The principle of isonomy and women’s equality in constitutional law. 1982. Doctoral Thesis (Doctorate in Public Law) – Law School, Federal University of Rio de Janeiro, Rio de Janeiro, 1982.
CASTRO, Carlos Roberto Siqueira. The non-delegation doctrine in American Constitutional Law. 1978. Dissertation (Master of Laws – LLM) – Michigan State University, Michigan, 1978.
CASTRO, Carlos Roberto Siqueira. Constitutional and regulatory law: essays and legal opinions: volume 2. Rio de Janeiro: Lumen Juris, 2020. 1192 p. ISBN 9786555102802
CASTRO, Carlos Roberto Siqueira. Constitutional and regulatory law: essays and legal opinions: volume 1. Rio de Janeiro: Renovar, 2011. 1531 p. ISBN 9788571477926
CASTRO, Carlos Roberto Siqueira. The open constitution and fundamental rights: essays on postmodern and communitarian constitutionalism. 2nd ed. Rio de Janeiro: Forense, 2010. 813 p. ISBN 9788530931735
CASTRO, Carlos Roberto Siqueira. The open constitution and fundamental rights: essays on postmodern and communitarian constitutionalism. 1st ed., 2nd print. Rio de Janeiro: Forense, 2005. 813 p. ISBN 8530918061
CASTRO, Carlos Roberto Siqueira. The open constitution and fundamental rights: essays on postmodern and communitarian constitutionalism. 1st ed. Rio de Janeiro: Forense, 2003. 813 p. ISBN 9788530931735
CASTRO, Carlos Roberto Siqueira. Due process of law and the principles of reasonableness and proportionality. 5th ed. Rio de Janeiro: Forense, 2010. 436 p. ISBN 9788530932572
CASTRO, Carlos Roberto Siqueira. Due process of law and the principles of reasonableness and proportionality. 4th ed. Rio de Janeiro: Forense, 2006. 450 p. ISBN 8530924754
CASTRO, Carlos Roberto Siqueira. Due process of law and the principles of reasonableness and proportionality. 3rd ed. Rio de Janeiro: Forense, 2005. 450 p. ISBN 8530922727
CASTRO, Carlos Roberto Siqueira. Due process of law and the reasonableness of laws in the new Brazilian constitution. 2nd ed. Rio de Janeiro: Forense, 1989. 417 p.
CASTRO, Carlos Roberto Siqueira. Due process of law and the reasonableness of laws in the new Brazilian constitution. 1st ed. Rio de Janeiro: Forense, 1989. 417 p.
CASTRO, Carlos Roberto Siqueira. Congress and legislative delegations. Rio de Janeiro: Forense, 1986. 210 p.
CASTRO, Carlos Roberto Siqueira. The principle of isonomy and women’s equality. Rio de Janeiro: Forense, 1983. 298 p.
CASTRO, Carlos Roberto Siqueira. Comments on the Statute of Advocacy and the Brazilian Bar Association. In: GOMES, Emerson Luis Delgado (Org.). Sanctions in disciplinary proceedings from the perspective of the Federal Bar Council’s jurisprudence. Brasília, DF: OAB Nacional, 2024. p. 41–137.
CASTRO, Carlos Roberto Siqueira. The right to happiness. In: SANTA CRUZ, Felipe; SIMONETTI, José Alberto (Coord.). Constitutionalism and the democratic rule of law: studies in honor of Paulo Bonavides. Brasília, DF: OAB Editora, 2021. p. 135–150.
CASTRO, Carlos Roberto Siqueira. Fundamental rights in the internet era – planetary transformations – artificial intelligence – the digital lawyer. In: BARATA, Bruno; ALMEIDA, Laryssa; FROTA, Leandro (Coord.). Essays on digital transformation in law: studies in honor of Minister Kássio Nunes Marques. Brasília, DF: OAB Editora, 2021. p. 79–115.
SIQUEIRA CASTRO, Carlos Roberto Siqueira. 200 years of the Constitution of Cádiz, 1812, and 20 years of the 1988 Brazilian Constitution. In: LOZANO MERINO, Raúl. Cádiz, 1912: the encounter between Spain and America in their dreams of freedom and justice. Madrid: Rasche, 2012. p. 221–244.
CASTRO, Carlos Roberto Siqueira. Constitution and the internationalization of human rights: interpretation of Article 5, §§ 2 and 3 of the Federal Constitution. In: FIGUEIREDO, Marcelo (Coord.). New directions for public law: reflections in honor of Professor Lúcia Valle Figueiredo. Belo Horizonte: Fórum, 2012. p. 95–134.
CASTRO, Carlos Roberto Siqueira. Same-sex relationships in the Constitution and the Statute of Sexual Diversity. In: MARTINS, Ives Gandra da Silva; ROSSET, Patrícia; AMARAL, Antonio Carlos Rodrigues do (Coord.). Studies: Public Law: In honor of Minister Carlos Mário da Silva Velloso. São Paulo: Lex Magister, 2012. p. 95–120.
CASTRO, Carlos Roberto Siqueira. 20 years of the democratic Constitution of 1988. In: GUERRA, Sydney; EMERIQUE, Lilian Balmant (Org.). Contemporary constitutional perspectives. Rio de Janeiro: Lumen Juris, 2011. ISBN 9788537508763. p. 61–70.
CASTRO, Carlos Roberto Siqueira. 20 years of the democratic Constitution of 1988. In: SOUZA NETO, Cláudio Pereira de; SARMENTO, Daniel; BINENBOJN, Gustavo (Coord.). Twenty years of the 1988 Federal Constitution. Rio de Janeiro: Lumen Juris, 2009. p. 19–25.
SIQUEIRA CASTRO, Carlos Roberto. The regulatory power of the National Civil Aviation Agency – ANAC: a case study. In: INSTITUTO IBEROAMERICANO DE DERECHO AERONÁUTICO Y DEL ESPACIO, Y DE LA AVIACIÓN COMERCIAL. Tribute to Dr. Enrique Mapelli López. Madrid: IIDAEAC, 2008. p. 343–355.
CASTRO, Carlos Roberto Siqueira. Extension of fundamental rights and duties to private relations. In: ROCHA, João Carlos de Carvalho; HENRIQUES FILHO, Tarcísio Humberto Parreiras; CAZETTA, Ubiratan. Human rights: contemporary humanitarian challenges – 10 years of the Refugee Statute (Law no. 9.474 of July 22, 1997). Belo Horizonte: Del Rey, 2008. p. 133–152.
CASTRO, Carlos Roberto Siqueira. The Constitution and the right to the human body. In: SARMENTO, Daniel; PIOVESAN, Flávia (Coord.). At the limits of life: abortion, human cloning, and euthanasia from the perspective of human rights. Rio de Janeiro: Lumen Juris, 2007. p. 279–294.
CASTRO, Carlos Roberto Siqueira. Regulatory normative function and the new principle of legality. In: ARAGÃO, Alexandre Santos de (Coord.). The normative power of regulatory agencies. Rio de Janeiro: Forense, 2006. ISBN 9788530922840. p. 25–73.
CASTRO, Carlos Roberto Siqueira. Human dignity: the principle of constitutional principles. In: SARMENTO, Daniel; GALDINO, Flávio (Org.). Fundamental rights: studies in honor of Professor Ricardo Lobo Torres. Rio de Janeiro: Renovar, 2006. p. 135–179.
CASTRO, Carlos Roberto Siqueira. Human dignity: the principle of constitutional principles. In: FIGUEIREDO, Marcelo; PONTES FILHO, Valmir (Org.). Public Law Studies in Honor of Celso Antônio Bandeira de Mello. São Paulo: Malheiros Editores, 2006. p. 164–203.
CASTRO, Carlos Roberto Siqueira. Application of fundamental rights to private relations. In: PEREIRA, Antônio Celso Alves; MELLO, Celso Renato Duvivier de Albuquerque. Studies in honor of Carlos Alberto Menezes Direito. Rio de Janeiro: Renovar, 2003. p. 227–246.
CASTRO, Carlos Roberto Siqueira. The legal regime and guiding principles of regulatory agencies. In: SARAVIA, Enrique; PECI, Alketa; BRASÍLICO, Edson Américo (Org.). Regulation, competition defense and concessions. Rio de Janeiro: ASEP; FGV, 2002. p. 121–141.
CASTRO, Carlos Roberto Siqueira. On the declaration of unconstitutionality and its effects in light of Laws No. 9.868 and 9.882/99. In: SARMENTO, Daniel (Org.). Judicial review and Law No. 9.868/99. Rio de Janeiro: Lumen Juris, 2001. p. 39–99.
CASTRO, Carlos Roberto Siqueira. The principle of human dignity in open and democratic constitutions. In: CAMARGO, Margarida Maria Lacombe (Org.). 1988–1998: a decade of the constitution. Rio de Janeiro: Renovar, 1999. p. 103–114.
CASTRO, Carlos Roberto Siqueira. For a critical teaching of constitutional law. In: PLASTINO, Carlos Alberto (Org.). Critique of law and the state. Rio de Janeiro: Graal, 1984. p. 135–143.