David Rockefeller his graduate studies, he received a Ph.D. from the University of Chicago in 1940. After completing his studies in Chicago, he became secretary to New York Mayor Fiorello La Guardia for eighteen months in a "dollar a year" public service position. Although the mayor pointed out to the press that Rockefeller was only one of 60 interns in the city government, his working space was, in fact, the vacant office of the deputy mayor. From 1941 to 1942, Rockefeller was assistant regional director of the United States Office of Defense, Health and Welfare Services. Rockefeller enlisted in the U.S. Army
Rockefeller University Rockefeller Jr. Greatly elevating the prestige of American science and medicine, it was America's first biomedical institute, like France's Pasteur Institute (1888) and Germany's Robert Koch Institute (1891). The Rockefeller Foundation, a philanthropic organization, founded in 1913, is a separate entity, but had close connections mediated by prominent figures holding dual positions. The first director of laboratories was Simon Flexner, who supervised the development of research capacity at the Institute, whose staff made major discoveries in basic research and medicine. While a student at Johns Hopkins University, Flexner had studied under the Institute's first scientific director, William H. Welch, first