Complex sentence: Shore is the winner of the Emory Williams Teaching Award, Emory's highest award for teaching, and, before holding his current Chair, was the first holder of the Emory College Distinguished Teaching Professorship in the Sciences and Social Sciences.
Split into simpler sentences: Shore is the winner of the Emory Williams Teaching Award, Emory's highest award for teaching. Before holding his current Chair, was the first holder of the Emory College Distinguished Teaching Professorship in the Sciences and Social Sciences.