Born in Newcastle, John Dangar Dixon settled in Sydney in 1945. After doing various advertising jobs, Dixon was advised to turn to the comics profession. He heeded the advice and started a long association with the H. John Edwards publishing company, where he created Tim Valour Comics (150 issues) and were he cooperated on the first issues of The Crimson Comet Comics (50 issues) in 1946. Then in 1958 and 1959 he expanded his activities, working for Frew Publications (Catman Comics), Young's Merchandising (Captain Strato Comics) and Horwitz Publications (The Phantom Commando Comics).
On 14 June 1959, his strip 'Air Hawk and the Flying Doctors' premiered in the Sunday issue of the Sydney Sun Herald. In 1963, 'Air Hawk' also became a daily strip. Dixon continued the strip until 1986, and throughout the years he has worked with assistants like Mike Tabrett, Hart Amos and Keith Chatto.
He then settled in the United States, where he worked as art-director of a self-defence magazine, as an independent illustrator for New York's Voyager Communications and as a storyboard artist for film van videogames. Dixon's use of black and white gave his panels great depth and helped create a special, dramatic effect.