Complex sentence: After being an Assistant Professor at Stanford University, Hepler joined the Faculty in the Botany Department at the University of Massachusetts at Amherst where he retired from the Biology Department as the Constantine J. Gilgut and Ray Ethan Torrey Professor Emeritus, although he continues to do research.
Split into simpler sentences: After being an Assistant Professor at Stanford University, Hepler joined the Faculty in the Botany Department at the University of Massachusetts at Amherst. Hepler retired from the Biology Department as the Constantine J. Gilgut and Ray Ethan Torrey Professor Emeritus, although he continues to do research.