[1][2] He studied medicine at the University of Otago, graduating MB ChB in 1953,[3] and then undertook postgraduate training in London.
[4] Until his retirement at the age of 60, Hall-Jones was a practising otolaryngologist,[1] and made a significant contribution to postgraduate medical education in Southland.
[4] An avid outdoorsman, much of Hall–Jones's writing focused on the natural history and wilderness areas of southern New Zealand.
[1] Hall-Jones would often begin research for his books by exploring the wilderness of an area by flying, kayaking, trekking or camping in a region.
[5] In the 1995 New Year Honours, Hall-Jones was appointed an Officer of the Order of the British Empire, for services to medicine and local history.