 Appointed to the chemistry faculty of Princeton University in 1985, Lehmann received both the Henry and Camille Dreyfus Award for new faculty and the Presidential Young Investigator Award from the National Science Foundation in his first year with the university.In 1987, the university acknowledged him with the Camille and Henry Dreyfus Teacher-Scholar Award.He was promoted to associate professor in 1991, and to full professor in 1995, the same year he was named a fellow of the American Physical Society.