Currently, Guilherme Fontes Ribeiro holds the position of Chief Executive Officer of Agro Pecuária Vale do Corumbataí SA.

He is also on the board of São Martinho SA, Joao Ometto Participaçoes SA, União da Indústria de Cana-de-Açúcar and Jottapar Participações SA.

In the past he held the position of Investment Manager at Itaú Asset Management SA and Portfolio Manager at BankBoston Asset Management Ltda.

Mr. Fontes Ribeiro received an undergraduate degree from Fundação Armando Alvares Penteado.