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
Dilma Rousseff in the group that Pinguelli would become the Minister of Energy if Lula won the election. It was a great surprise for everyone that, after elected, Lula chose Rousseff as the incumbent Minister. The President elect declared: "Already near 2002, it appears there a comrade with a little computer in her hand. We started debating and I realized she had a differential characteristic from the others who were there, because she came in with the practicality of the assignment of running the Secretary of Energy of Rio Grande do Sul. Then I was like: I think I found my Minister