John Henry Manley (July 21, 1907 – June 11, 1990) was an American physicist who worked with J. Robert Oppenheimer at the University of California, Berkeley before becoming a group leader during the Manhattan Project.

By the time World War II broke out, Manley was at the University of Chicago's Metallurgical Laboratory.

In 1942, his friend and colleague, J. Robert Oppenheimer, held a meeting with several leading theorists at UC Berkeley.

[2] Manley spent his first days in Los Alamos working with other newcomers on the construction of laboratory buildings.

She was hired as a human computer in the T (Theoretical) Division but then quit after six months to focus on raising their children.