Blas Nuñez-Neto (born 1973/1974)^[1] is an American government official who works in the White House of the Joe Biden administration. He has been described as a key architect of the Biden administration's immigration policy.^{[2][3][4][1][5]} He played a central role in Senate negotiations over a bipartisan border deal that was ultimately scuttled when former president Donald Trump pressured Republicans to abandon it.^[3][4]

Nuñez-Neto was born in Argentina.^[2][3] He immigrated to the United States as a child.^[4] After graduate school, he worked at the Congressional Research Service, as an aide on border security to Sen. Tom Carper (D-Del.), and briefly as an adviser in Customs and Border Protection in the Barack Obama administration.^[2]

He worked on border security issues at the RAND Corporation until 2021 when he became chief operating officer for Customs and Border Protection (CBP) in the Joe Biden administration.^[2] Later that year, he took a position in the Department of Homeland Security.^[2] Nuñez-Neto has a close partnership with Roberto Velasco Álvarez, the top official at Mexico's Foreign Ministry for North American affairs, who substantially curtailed illegal border crossings into the United States.^[2]

In 2024, Nuñez-Neto was promoted to a position in the White House.^[2]