 His undergraduate research included work in reaction dynamics with John Krenos and John Tully of Bell Laboratories, photoelectron spectroscopy with Joseph Berkowitz of Argonne National Laboratory, and raman and resonate multiphoton ionization (REMPI) spectroscopies under Professor Lionel Goodman.Lehmann went on to receive his doctorate in chemical physics from Harvard University in 1983, and was elected to the Harvard Society of Fellows, where he was a junior fellow until 1986.Under the direction of William Klemperer, Lehmann's graduate work involved studies of highly excited vibrational states using photoacoustic spectroscopy.