Since 2011, Denis Mizne has served as the chief executive officer of the Lemann Foundation, a nonprofit that's dedicated to ensuring that all Brazilian children have access to quality public education. Under Denis' leadership, the foundation has helped to construct Brazil's National Learning Standards, scaled the foundation's "management for learning" program to over 1,000 schools and built out the Lemann Fellowship Program, creating a network of young changemakers dedicated to solving social problems in Brazil. Prior to the Lemann Foundation, Denis founded the Sou da Paz (I Am for Peace) program to reduce Brazil's gun violence. During his 12 years as its executive director, the program contributed to an 80-percent reduction in homicides in São Paulo, as well as to the introduction of crime prevention initiatives at the national level. Denis is an Ashoka Social Entrepreneur, a Yale World Fellow and sits on the board of several nonprofits. He attended the University of São Paulo Law School and continued his education as a visiting scholar at Columbia University and at Harvard Business School's OPM program.