Brandon Williams (politician)

Brandon Williams
Official portrait, 2025
United States Under Secretary of Energy for Nuclear Security
Assumed office
September 26, 2025
PresidentDonald Trump
Preceded byJill Hruby
Member of the U.S. House of Representatives
from New York's 22nd district
In office
January 3, 2023 – January 3, 2025
Preceded byJohn Katko (redistricted)
Succeeded byJohn Mannion
Personal details
BornBrandon McDonald Williams
(1967-05-22) May 22, 1967
Dallas, Texas, U.S.
PartyRepublican
Education
Military service
AllegianceUnited States
Branch/serviceUnited States Navy
Years of service1991–1996
RankLieutenant
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Brandon McDonald Williams (born May 22, 1967) is an American politician who serves as the United States Under Secretary for Nuclear Security and Administrator of the National Nuclear Security Administration. A member of the Republican Party, he served as the representative for New York's 22nd congressional district from 2023 to 2025.

On January 16, 2025, President-elect Donald Trump named Williams as under secretary. He was confirmed by the U.S. Senate on a 51–47 vote on September 18, 2025, and sworn in on September 26, 2025.