Sion Advogados’s team has more than thirty excellent lawyers and consultants acting to deliver only the highest quality counsel as well as the most efficient and innovative services in order to steadily advance client goals. The firm’s commitment to creating and sustaining a diverse work environment is absolute. Our team is composed of the most talented lawyers in the industry, works on an integrated business model, improving the supply and quality of services. Sion Advogados team is committed to helping you succeed. We work with individuals, organizations, and businesses of all sizes. We’ll help you prioritize your objectives and we’ll keep those objectives in mind by taking a practical and experienced approach to the solutions we pursue in collaboration with you.

Your team

Alexandre Oheb Sion

Founding partner of Sion Advogados

Post-Doctorate in Law at University of Salamanca, Spain (certificate pending on the doctoral dissertation defense). Doctorate and Masters in Law candidate at Universidade Autônoma de Lisboa, Portugal (credits performed). Master’s degree in International Commercial Law (L.LM) at University of California, United States. Expert in Constitutional Law, Civil Law, and Civil Procedure Law at FGV (Fundação Getúlio Vargas). Lawyer graduated in Law and in Business Administration. Professional with strong background in supporting the implementation and operation of large capital intensive industries and developments and of infrastructure projects in Brazil.

  • ·         Foi advogado interno (2001 a 2011) da Vale, MMX e Anglo American, tendo ocupado nestas duas últimas empresas funções executivas na área jurídica.

    ·         Nos últimos anos foi o Head do jurídico regulatório Brasil do grupo Anglo American.

    ·         Vice-Presidente nacional da União Brasileira da Advocacia Ambiental – UBAA.

    ·         Consultor da Comissão Nacional de Direito Ambiental da OAB – Conselho Federal (até dez/2018).

    ·         Presidente da Comissão de Direito de Infraestrutura da OAB/MG.

    ·         Foi Coordenador do Grupo de Trabalho Jurídico do SINDIEXTRA – Sindicato da Indústria Mineral do Estado de MG.

    ·         Foi membro da Comissão Jurídica Nacional do IBRAM – Instituto Brasileiro de Mineração.

    ·   Membro das Comissões de Direito Ambiental, Direito de Energia, Direito Minerário, Arbitragem e Conciliação, Direito da Construção e Advocacia Corporativa (2010-2012) da OAB/MG.

    ·         Membro da Comissão da Comissão Permanente de Direito Ambiental da OAB/SP (até dez/2018).

    ·         Membro da Comissão de Anticorrupção e Compliance da OAB/RJ.

    ·         Membro do Comitê Nacional de Infraestrutura e Construção da CAMARB – Câmara de Mediação e Arbitragem Empresarial.

    ·         Membro da Comissão de Empresários para o Meio Ambiente da FIEMG (2010-2012).

    ·         Professor dos programas de pós-graduação da PUC/MG, do IDP/SP, do CAD/MG, da PUC/RS, entre outras.

    ·         Professor convidado da ESMAM – Escola da Magistratura do Estado do Maranhão e ESAP – Escola Judiciária do Amapá.

    ·         Palestrante atuante na Espanha, Portugal e diversas capitais brasileiras, autor e coautor de inúmeros livros e quase uma centena de artigos jurídicos.


    ·    Alexandre Sion e Sion Advogados figuram entre os advogados e os escritórios mais admirados do Brasil segundo, entre outras, as publicações Chambers Global, nos anos 2019, 2018, 2017, 2016 e 2015; Chambers Latin America, anos 2019, 2018, 2017, 2016, 2015 e 2014; Análise Advocacia 500, anos 2018, 2017, 2016, 2015, 2014 e 2012; The Legal 500, anos 2018, 2017, 2016 e 2015; IFLR1000 2019, 2018 e 2017, Leaders League 2019 e 2018, Who?s Who Legal 2018 e 2017 e Best Lawyers, anos 2019, 2018, 2017, 2016 e 2015, entre outras. 

Bernardo Barbosa Pimentel Pessoa

Partner at Sion Advogados

Head of the Strategic Litigation, Corporate, Mergers and Acquisitions and Real Estate departments. Lawyer acting for more than a decade in legal advisory of large national and foreign companies, on structuring and supporting the implementation and operation of large capital intensive and infrastructure projects, besides M&A in the mining, oil and gas, infrastructure, logistic, energy and real estate segments. Specialist in corporate law, capital markets and contracts in both consultancy and litigation in judicial and arbitration procedures. 

  • Member of Energy Law Committee of Brazilian Bar Association/State of Minas Gerais (OAB/MG).
  • Member of Arbitration Committee of Brazilian Bar Association/State of Minas Gerais (OAB/MG).
  • Member of infrastructure works Committee of Brazilian Bar Association/State of Minas Gerais (OAB/MG).

Gustavo Santiago

Partner at Sion Advogados

Partner in the Energy Department at Sion Advogados. MBA in Management of the Electric Sector by FGV. Lawyer specialized in Regulatory Law and Energy Law with more than a decade of experience in the legal assistance of large and medium-sized companies, in all segments of the electric sector – generation, transmission, distribution and commercialization, acting before ANEEL, CCEE, ONS  and MME. 

  • Founding Member, Secretary-General and Chairman of ABDEM’s Distributed Generation Committee.
  • Member of the Energy and Infrastructure Law committees of OAB-MG.
  • Member of the Chamber of the Energy Industry at FIEMG.
  • Professor and Coordinator of postgraduate courses at PUC Minas.
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