J. Robert Oppenheimer, "the father of the atomic bomb" was the first director of Los Alamos National Laboratory, beginning in 1943.

Julius Robert Oppenheimer (April 22, 1904 in New York City – February 18, 1967 in Princeton, New Jersey) was an American physicist of Jewish descent. He is best known as the scientific director of the Manhattan Project. In World War II, the project built the first nuclear weapons. That is why Oppenheimer is called "the father of the atomic bomb".