Jill Hruby

Jill M. Hruby is an American mechanical engineer and government official. From 2021 to 2025, Hruby served as Under Secretary of Energy for Nuclear Security and Administrator of the National Nuclear Security Administration, a post subject to Senate confirmation. Jill Hruby made history as the first woman to ever head a U.S. nuclear weapons lab, serving as director of Sandia National Laboratories from 2015 to 2017.