Southern served as a director of several corporations, including Lafarge, Southam Inc., Chrysler Corporation of Canada, Imasco, Canadian Airlines, Fletcher Challenge, Royal & SunAlliance and Canadian Pacific. He was a director of Akita Drilling Ltd. and chairman of Sentgraf Enterprises Ltd. Southern was also a member of the Trilateral Commission. In September 2006, Ron Southern was appointed Officer of Orange Nassau by Her Majesty Queen Beatrix of The Netherlands.