Having studied agriculture and sheep-breeding in England in 1919, in 1920 Joynt became a soldier settler, dairy farming near Berwick. By 1929 he was pursuing business interests in Melbourne, where he was a pioneer of colour printing in Australia. About 1920 he had formed Queen City Printers Pty Ltd, and subsequently formed Colarts Studios Pty Ltd and bought the rights to a German colour-printing process. In the early 1920s he toured an exhibition titled 'The Pictorial Panorama of the Great War Under various business names, Joynt remained a printer and publisher for over sixty years.