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 Hospital's first director Rufus Cole retired in 1937 and was succeeded by Thomas Milton Rivers. As director of The Rockefeller Institute's virology laboratory, he established virology as an independent field apart from bacteriology. Notable figures to emerge from the institution include Alexis Carrel, Peyton Rous, Hideyo Noguchi, Thomas Milton Rivers, Richard Shope, Thomas Francis Jr, Oswald T. Avery, Rebecca Lancefield, Wendell Meredith Stanley, René Dubos, Ashton Carter, and Cornelius P. Rhoads. Others attained eminence before being drawn to the university. Joshua Lederberg, who won the Nobel Prize in Physiology or Medicine in 1958, served as president of the university