Physicist.
Victor Frederick Weisskopf (September 19, 1908 – April 22, 2002) was an Austrian-born American theoretical physicist. He did postdoctoral work with Werner Heisenberg, Erwin Schrödinger, Wolfgang Pauli and Niels Bohr. During World War II he worked at Los Alamos on the Manhattan Project to develop the atomic bomb, and later campaigned against the proliferation of nuclear weapons.
Source:
1.)"...Victor Weisskopf, who describes himself as an atheist Viennese Jew...." Quoting from page 14 of The Prism of Science, by Edna Ullmann-Margalit, Springer, 1986.