Graças Foster as the Transportadora Brasileira do Gasoduto Bolivia-Brasil. In 1998, Foster was working for a Petrobras unit that was involved importing natural gas from Bolivia. During this time, she met Dilma Rousseff, who in October 2010, would be elected to serve as the first female President of Brazil. In 1998, Rousseff was a relatively unknown energy official, serving in Rio Grande do Sul in southern Brazil. Foster and Rousseff developed a lifelong professional relationship, based in their mutual support of the leftist Workers Party, which rose to power in 2002, resulting in the election of Luiz Inácio Lula da Silva as
Joice Hasselmann around the country. She is a critic of several politicians, for example, the then governor Beto Richa, the former President Dilma Rousseff, the former President Luiz Inácio Lula da Silva as well as Workers' Party. In 2015 and 2016, she participated in several protests against the Dilma government and later participated as a guest of the prosecution session for the impeachment of Dilma Rousseff, also participated in protests in defense of Operation Lava Jato and in support of the Brazilian Federal Police. In that time, she wrote a book about the Brazilian judge Sérgio Moro, responsible for the Lava Jato