Our Team

João Marçal Martins

João Marçal Martins


Legal Practice Areas

Litigation, Arbitration and Mediation


Energy and Natural Resources (Oil and Gas, Electrical Power, Mining)

João Marçal is a partner of Campos Mello Advogados in cooperation with DLA Piper of the Litigation and Arbitration practice and Energy & Natural Resources sector, based in Sao Paulo.

He has a broad experience and not only acts as an arbitrator in ad hoc and institutional proceedings, but also represents clients in judicial lawsuits, domestic and international arbitrations, mediations, dispute boards and administrative procedures.

Joao’s experience encompasses crisis management, by representing clients in civil inquiries, class actions, parliamentary inquiry committees, and negotiation of settlement agreements.

His client portfolio includes construction companies and service providers in several industries, such as energy, healthcare, technology and oil and gas.





  • Masters in Law (LL.M.) in Business Law, Fundação Getúlio Vargas de São Paulo (FGV-SP), 2023
  • Certificate in Business and Law, Wharton School, 2017
  • Masters in Law (LL.M.), University of Pennsylvania (UPenn), 2017.
  • Masters in Law (LL.M.) in Public Law, Fundação Getúlio Vargas do Rio de Janeiro (FGV-RJ), 2014
  • Bachelor of Law, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), 2010



  •  Recognized as a Recommended Lawyer by The Legal 500
    Dispute Resolution – Litigation: 2022 and 2023
    Energy and Natural Resources – Hydrocarbons: 2023
  •  Recognized as an Up and Coming Laywer by Chambers Brazil – Dispute Resolution: Rio de Janeiro: 2023
  • Recognized as a Recommended Lawyer by Best Lawyers in Corporate M&A: 2023


“I would like to refer to João Marçal Martins as a rising star in litigation. He is talented, assertive. He quickly understands the deep aspects of the case and is easy to deal with.”

The Legal 500, 2021


“Joao Marcal Martins is a highlight. Martins is a Member of CIArb and is a young promise in the Brazilian arbitral community.” “João Marçal is a young lawyer with deep knowledge of arbitration proceedings”

The Legal 500, 2021


  • International Associate Editor, Journal of International Law, Vol. 38, University of Pennsylvania 
  • IV Curitiba Pre Moot 
  • II Brazilian National Arbitration Moot (Competição Brasileira de Arbitragem) promoted by CAMARB (Câmara de Arbitragem Empresarial – Brasil) 
  • XVIII Willem C. Vis International Commercial Arbitration Moot Finalist 
  • I Veirano Moot Training 



Professional Memberships


  • Brazilian Bar Association (OAB), Rio de Janeiro and São Paulo Chapters
  • Member of the list of arbitrators of the Brazilian Center for Mediation and Arbitration (CBMA), the Board of Arbitration of the State of São Paulo (CAESP) and the Chamber of Specialized Mediation and Arbitration (CAMES)
  • Member and Young Members’ Group Ambassador of the Chartered Institute of Arbitrators (CIArb)
  • Vice Chair, Special Projects, ABA Section of International Law, International Courts and Judicial Affairs Committee
  • Founding member and former director of Penn Law International Arbitration Association
  • Member of the Brazilian Institute of Private Law (IDP)
  • Lecturer at the Superior School of Law of the Brazilian Bar Association (Rio de Janeiro Section) and at Future Law (Thomson Reuters)
  • Founding member of the Brazil Infrastructure Institute




  • Portuguese
  • English




  • A Necessária Internacionalização das Bancas de Advocacia no Brasil (The Necessary Internationalization of the Law Firms in Brazil). In FEIGELSON, Bruno et. al. (ed.), The End of Lawyers?, São Paulo: RT, ago/2021.
  • Os Impactos da Covid-19 na Administração de Procedimentos Arbitrais (The impacts of Covid-19 in the Administration of Arbitration Procedures). In João Bosco Lee and Flavia Mange (eds), Revista Brasileira de Arbitragem, (Comitê Brasileiro de Arbitragem CBAr & IOB; Kluwer Law International 2020, Volume XVII Issue 66) pp. 191 – 197.
  •  An answer to criticisms against the lack of efficiency in arbitration: measures to reduce time and costs. Revista Brasileira de Arbitragem/Kluwer Law International, v. XIV, Issue 56, Dec/2017, p. 23-34.
  • Brazil: Validity of an arbitration clause providing for “mediation or arbitration”. Coauthor. Global Arbitration News, (June, 2016).
  • A Carta Arbitral (The Arbitral Letter). Coauthor. In Beneduzi, Renato Resende; Campos M, Leonardo de (Coord.). A Reforma da Arbitragem. Rio de Janeiro: Forense, 2016.
  • Arbitragem com Administração Pública: arbitrabilidade e aspectos controversos (Arbitration with Public Entities: arbitrability and controversial issues). Coauthor. In Dubeux, Bruno Teixeira; Mannheimer, Sergio Nelson (Orgs.). Arbitragem na Administração Pública. v. XXVI. Rio de Janeiro: APERJ, 2016.
  • Brazil Energy Disputes. Coauthor. Getting the Deal Through (March, 2016).
  • Brazil – Baker & McKenzie International Arbitration Yearbook, 2014-2015 and 2015-2016. Coauthor. In Juris.
  • O dever de mitigar danos na CISG e sua aplicação no Brasil (The duty to mitigate damages in the CISG and its applicability in Brazil). Coauthor. In Marcial Pons. (January, 2015).
  • A extensão dos efeitos da cláusula arbitral para partes não-signatárias (The extension of the effects of the arbitration clause to non-signatories). In www.maxwell.lambda.ele.puc-rio.br (January, 2011).