Herbert York (1921-2009), a Mohawk Physicist, began working on the Manhattan project at the Berkeley Radiation Laboratory in California. He then moved to the Oak Ridge National Laboratory at the Y-12 Plant where he worked on electromagnetic separation of uranium-235.

After the war, York served as the first director of the Lawrence Livermore National Laboratory for 6 years. In this position, York oversaw various Atomic Energy Commission projects including the Hydrogen bomb's development. He was then named the first chief scientist at the Pentagon's Advanced Research Projects Agency where he oversaw space and anti-missile research. York later was given the title of Director of Defense Reseach and Engineering. After retiring from his work at the Pentagon, York fought for antinuclear and anti-proliferation efforts.

"Native Americans and the Manhattan Project," Atomic Heritage Foundation, https://www.atomicheritage.org/history/native-americans-and-manhattan-pr...

"Herbert York," Atomic Heritage Foundation, https://www.atomicheritage.org/profile/herbert-york