After leaving university, Stone began working with the Australian division of
Pearl & Dean, a cinema advertising company. He moved to the UK in 1988 and in 1991 became regional sales director of Mills & Allen Outdoor. He transferred to Belgium in 1994 as CEO of
Vivendi's Belgian division, comprising Belgoposter Outdoor, Claude Publicité. In 1998, Stone joined RMB International as
chief operating officer (COO). He bought his own outdoor advertising company, Dewez, in 2001. From 2012 until his death he was president of the Belgian branch of Australian Business in Europe (ABIE). ==Personal life and death==