In August 1987 Mojo was acquired by the Melbourne-based publicly listed agency Monaghan Dayman Adams Limited and became MojoMDA. The resultant merged business maintained its listed status until 1989. The Mojo MDA Group had offices in London, New York, San Francisco, Hong Kong, Singapore and affiliates throughout Asia. In 1988 Advertising Age named it as International Agency of the Year. In August 1989 the Mojo MDA Group was Australia's largest ad agency with billings of $180million and was acquired by the Los Angeles agency Chiat\Day. The merger was unsuccessful and in 1992 Chiat/Day sold off Mojo to Foote, Cone & Belding. In later international dealings which saw FCB acquired by the Interpublic Group, the Australian Mojo offices were sold to Publicis. In 1994 Jo left the employment of the Australian Mojo business and returned to Hertz Walpole as an Executive Creative Director, taking up a shareholding. When Alan Morris finished up a stint at Singleton Ogilvy & Mather in 1999, he took up the opportunity to re-unite with Jo and Jim Walpole and their agency was renamed "Morris Johnston Walpole". 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. As of 2010 the agency at which Jo started in 1968 which was then called "Marketing & Advertising" was still in operation and then known as "MJW Hakuhodo". His marriage to his wife Jean is longstanding. Their sons Jason and Leith followed Jo into careers in advertising. He has six grandchildren - three by each son : Declan, Ruby, Liam, Matilda, Zeik and Arlo. 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. In 2007 the Advertising Federation of Australia awarded its AFA Medallion to Mo and Jo describing the pair as "the Lennon & McCartney of Australian advertising". In 2009 Morris & Johnston were included in the inaugural 12 inductees to Ad News Magazine's, Australian Advertising Hall of Fame.