Justice Cepeda is the former Chief Justice of the Constitutional Court of Colombia, where he gave judgment in landmark freedom of expression and media cases before the Court.

He also served as the Presidential Advisor for the Constituent Assembly of Colombia, preparing the articles that addressed freedom of expression and access to information in Colombia’s Draft Constitution. Justice Cepeda is President Emeritus of the International Association of Constitutional Law, and was part of the transitional justice group of experts that negotiated the peace agreement with the FARC guerrilla.