Dr. Bill Cadell graduated in Dentistry in 1974. His first appointment as Dentist-in-charge of Mossman Hospital Dental Clinic was followed by a period as a school dentist based in Atherton before taking a position as Dentist-in-charge of Mareeba Hospital Dental Clinic. In 1979 he returned to the University of Queensland to complete a Master of Dental Science Degree in Orthodontics.
After graduating he commenced private practice in Cairns in March,1981, initially situated in the Pentagon Building in Grafton Street, and since 1998, in the current location at Medical House, Woree. Between 1981 and 1983, he flew regularly to PNG, establishing branch practices in Port Moresby and Lae.
Currently, Dr. Cadell is a director of W.B.Cadell (Orthodontist) Pty. Ltd. at Medical House.