Dr. Johnson was appointed Chair of the Endodontics Department at the School of Dentistry at the University of Washington in 2003. He also serves as the Program Director for the Advanced Specialty Education Program in Endodontics at the University of Washington as a Clinical Associate Professor. Dr. Johnson retired from the U.S. Navy Dental Corps in 2003 at the rank of Captain. Dr. Johnson reported to the faculty of the Endodontics Department of the Naval Postgraduate Dental School in July 1994. He assumed the position as Chairman of the Endodontics Department and Director of the Advanced Specialty Education Program in Endodontics at the Naval Postgraduate Dental School in 1997, and held that post until 2001.
Additionally, he served as Specialty Leader for Endodontics, Bureau of Medicine and Surgery to the Surgeon General of the Navy. Dr. Johnson served as Chair, Research Department, at the Naval Postgraduate Dental School in Bethesda, Maryland from 2001 to 2003.
Dr. Johnson attended the University of Colorado as an undergraduate and received his DDS degree from Northwestern University Dental School. Upon graduation he was commissioned as a Dental Officer in the U.S. Air Force, serving at the USAF Regional Hospital, March AFB, California; the 483rd USAF Hospital in the Republic of Viet Nam; and the USAF Dispensary at Ent AFB, Colorado. Dr. Johnson went into private practice in Colorado before returning to Northwestern University Dental School to earn a Certificate in Endodontics and a M.S. degree in 1985.
Dr. Johnson returned to active duty in the Navy after completion of his residency. He has served as the Head of the Endodontics Department at these duty stations: Naval Dental Clinic, Camp Lejeune, NC; the 2nd Dental Company, Camp Lejeune, NC; and at the Branch Dental Clinic Washington Navy Yard, Washington DC. Dr. Johnson is a Diplomate of the American Board of Endodontics. He is a member of the American Dental Association, the American Association of Endodontists, the College of Diplomates of the American Board of Endodontics, the American Dental Education Association, the International Association of Dental Research, the International Association of Dental Traumatology, and is past president of the U.S. Navy Association of Endodontists, and past president of the Edward C. Penick Endodontic Study Club, and past president of the Coastal Carolina Dental Society. He is also a member of the Seattle – King County Dental Society, the Washington State Dental Association, and the Washington State Association of Endodontists.
Additionally, he serves as a consultant for Endodontics for the Commission on Dental Accreditation for the American Dental Association. He is an officer on the Board of the Washington State Association of Endodontists. He is a Fellow in the International College of Dentists. Dr. Johnson’s research and academic interests include surgical and nonsurgical endodontics, pulpal / periradicular biology and pathology, instrumentation of the root canal system. He has published numerous scientific papers, and has lectured in the United States, and Europe.