 Kabat did postdoctoral work with Arne Tiselius and Kai Pederson in Uppsala, Sweden, to learn the new methods of ultracentrifugation and electrophoresis.He returned to New York City to take up a position as an instructor of pathology at Cornell University Medical College, served for three years before moving uptown and spent the main part of his career at Columbia University.In 1942, Kabat married Sally Lennick, a young Canadian art student.