Campos Ferreira, Sá Carneiro & Associados

Margarida Rosado da Fonseca

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Practice Areas

Margarida Rosado da Fonseca heads the EU and Competition practice. With more than two decades of experience, her professional career has included acting both as an EU and Competition (and regulatory) lawyer and as Merger Director at the Portuguese Competition Authority.


Law Degree, Law School, Lisbon University,1996. LL.M in European Union Law at the College of Europe, Bruges, Belgium, 1996-97. Trainee lawyer at Marques Mendes Advogados, 1997-98. Trainee Lawyer and subsequently Associate at PLMJ, 1998-2000. Traineeship in the Merger Task Force of Directorate General for Competition of the European Commission, 2000-01. Associate, Senior Associate and subsequently Senior Lawyer at Morais Leitão, Galvão Teles, Soares da Silva & Associados, 2001-11. Deputy to the Secretary of State to the Prime Minister, of the XIX Portuguese Government, 2011-13. Director of the Merger Department at Portuguese Competition Authority, 2013-15. Head of the EU and Competition Area of Practice and Of-Counsel of DLA PIPER ABBC, 2016-19. Head of the EU and Competition Area of Practice and Counsel of Campos Ferreira, Sá Carneiro - CS Associados, 2019.

Professional Memberships

Portuguese Bar; Secretary-General of the Portuguese Competition Lawyers Association and Portuguese Association of European Law


Co-Author of book on the Competition Authority’s decisional practice in merger control (2009)