During the 1970s and 1980s Mojo was the hottest creative agency in Sydney and Mo and Jo had success jointly authoring World Series Cricket's "C'mon Aussie C'mon ".
[4] The Mojo approach to TV advertisements used a colloquial and irreverent style, often with a catchy jingle to simple accompaniment and frequently sung in Jo's own "gravelly" voice.
[6] The Mojo MDA Group had offices in London, New York, San Francisco, Hong Kong, Singapore and affiliates throughout Asia.
[9] In 1994 Jo left the employment of the Australian Mojo business[1] and returned to Hertz Walpole as an Executive Creative Director, taking up a shareholding.
The re-unification failed to set the advertising world on-fire and in 2002 the veterans accepted an offer for sale from the Japanese multinational communications group Hakuhodo.
Together with Morris, Johnston was acknowledged by his peers with admissions to the Halls of Fame of Campaign Brief (magazine) in 2006 and the Australian Writer and Art Directors Association in 2009.