David Bargueño is a 2024 Millennium fellow and is a career foreign service officer with the US Department of State, currently serving as the inaugural climate attaché and deputy counselor for environment, science, technology, and health at the US embassy in Brasília, Brazil. His previous assignments include Afghanistan, Pakistan, South Africa, and Brazil (São Paulo). In Washington, DC, he served in the Office of the Special Presidential Envoy for Climate and the Secretary of State’s Office of Global Food Security. The secretary of state awarded Bargueño the annual global Frank E. Lowe Award for Environmental Diplomacy in 2023 and the American Foreign Service Association awarded him the annual Mark Palmer Award for the Advancement of Democracy in 2018. Spanish and English were his first languages, and he has studied Portuguese, Zulu, Urdu, Mandarin Chinese, French, and German. Bargueño is a graduate of Princeton and Yale.