Don S. McMahon is a retired Seventh-day Adventist medical doctor from Australia. Between 1971 and 1978 he lectured at Melbourne University where he assisted Professor Graeme Clark in the development of the Cochlear Implant (or Bionic Ear). He continued as a visiting lecturer while working as an ear, nose and throat surgeon for the rest of his career. He has been published in the medical textbook “Medicine and Surgery for Lawyers” and served on state medical panels associated with the Victorian Law Courts. Other books he has published are “Eucalypts for Enthusiasts”, “The Good News of Revelation” and “Historic and Significant Bridges of Australia”. He also served on a surgical team during the Vietnam War.