« Back

Marcel Medon Santos

Marcel Medon Santos

Practice Groups

Antitrust, Compliance & Investigation


Office: São Paulo
Phone: (55 11) 50865144


Professional experience

Marcel has long experience with Antitrust Law. He was Director of the Secretariat of Economic Law (SDE), where he worked for 6 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 has also solid experience 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, Legal 500, Latin Lawyer 250 and other relevant international legal guides.


  • English


  • Post-graduate studies in Antitrust Law from Fundação Getúlio Vargas de São Paulo (FGV/SP), 2005. 
  • Graduate of the Law School of the Pontifícia Universidade Católica de São Paulo (PUCSP), 2000.

Additional activities:

  • Member of the Competition Commission at the Brazilian Bar Association, São Paulo Section.


  • Co-author of the "Competition Law in Brazil" chapter of the book Competition Law in Latin América, Wolters Kluwer, 2016.
  • "Content and Logical Structure of the Article 20 of Statute 8.884/94 (Antitrust Law)". Revista Direito GV, São Paulo, jan.- jun., 2008.

« Back