Dr. Robert Greenberg attended New York University College of Dentistry where he received his Doctor of Dental Surgery degree in 1975. He then completed a General Practice Residency Program at Illinois Masonic Medical Center in 1976. In 1979, after completing a two year endodontic specialty program at the University Of Illinois Dental School, he started the private practice of endodontics.

Dr. Greenberg is an attending staff member of both Loyola University Medical Center and Illinois Masonic Medical Center where he conducts endodontic seminars in the general practice residency programs. He is also a member of the American Dental Association,  Chicago Dental Society, Illinois State Dental Society,  American Association of Endodontists,  Illinois Association Of Endodontists, Edgar D. Coolidge Endodontic Study Club, and the Chicago Dental Forum.