Nestor José Forster Júnior (born 10 April 1963) is a Brazilian diplomat, who formerly served as Ambassador Extraordinary and Plenipotentiary of Brazil to the United States of America in Washington, D.C.

As a diplomat, he served in Canada, Costa Rica, and the United States, where he was posted three times to the Embassy in Washington, as well as to the Brazilian consulates in Hartford (CT) and New York (NY).

[4] Forster was the Chargé d'Affaires at the Brazilian Embassy in Washington, D.C. from June 2019 until his confirmation as the Ambassador of Brazil to the United States.

[9] During his tenure as Ambassador in Washington, Brazil and the United States negotiated cooperation agreements in trade, space and defense matters.

[12] On defense cooperation, the Research, Development, Test, and Evaluations (RDT&E) Agreement, signed by Brazil and the United States in 2020, entered into force in 2022.