Paul O. Walker, D.D.S., M.S., Vice President, Clinical Quality/Development, Kool Smiles, Atlanta, Georgia. Dr. Walker is a board certified pediatric dentist. He served as the Program Director of the Advanced Education Program in Pediatric Dentistry and the Director of the Hospital Dental Clinic at the University of Minnesota from 1972-1994. Dr. Walker is also a Clinical Professor, Indiana University in a part-time capacity and an independent pediatric dentistry consultant. In 2011, Dr. Walker was appointed to the Minnesota Board of Dentistry for a four-year term.