 from the Yale School of Medicine (1987), and a Ph.D. in computer science from Yale University (1987).Greengard has been the director of the Courant Institute of Mathematical Sciences, an independent division of the New York University (NYU) and is currently a professor of mathematics and computer science at Courant.He is also a professor at New York University Tandon School of Engineering and the director of the Simons Center for Data Analysis.