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Marcel Medon Santos

Marcel Medon Santos

Practice Groups



Office: São Paulo
Phone: (55 11) 5086-5144


Professional experience

Marcel has long experience with antitrust law. He was Legal Coordinator and Director of the Secretariat of Economic Law of the Ministry of Justice (SDE/MJ), where he worked for six years (2001-2007). He was one of the officials responsible for the implementation of the modern investigation techniques currently used by the Brazilian Competition Protection System (including dawn raids and leniency agreements). Marcel also has solid expertise in the private practice, assisting clients with risk assessment of business practices, investigation of conducts, merger review and implementation of corporate compliance programs.


Recognized as a leading antitrust lawyer in Brazil by Chambers Latin America, Who’s Who Legal, The Legal 500, Latin Lawyer 250 and Análise Advocacia 500, among other relevant international legal guides.


  • English


  • Postgraduate degree in Antitrust Law from FGV-SP (Fundação Getulio Vargas - São Paulo), 2005. 
  • Graduate of the Law School of PUC-SP (Pontifícia Universidade Católica de São Paulo), 2000.

Additional activities:

  • Member of the Competition Commission at OAB/SP (Brazilian Bar Association, São Paulo section).


  • "Controle Externo e Franquias: O Caso Chilli Beans" (co-author). In Jurisprudência do CADE Comentada. São Paulo: Revista dos Tribunais, 2019.
  • "Brazil" chapter (co-author). In Getting the Deal Through - Merger Control. London: Global Competition Review, 2019.
  • "Competition Law in Brazil" chapter (co-author). In Competition Law in Latin America. Alphen aan den Rijn: Wolters Kluwer, 2016.
  • "Content and Logical Structure of the Article 20 of Statute 8,884/94 (Antitrust Law)" article. In Revista Direito GV. São Paulo: FGV-SP, January-June 2008.

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