[1][2][4] His father, Summerfield Johnston, Jr., served as the former Chairman and CEO of the Coca-Cola Enterprises.
[1][2][3][4] He sat on the Boards of Directors of the Krystal restaurant chain, MetalTek International, a specialty metal casting company, SunTrust Bank of Chattanooga, N. A., Southern Screens Entertainment, a real estate and multi-screen cinema house company in Argentina, and e-Skye Solutions, a distributor of channel management software.
[1][4][5][6][7] He was a principal partner of the Flying H Polo Club in Big Horn, Wyoming.
[3][7] His teams were three times runner up in the United States Open Polo Tournament.
[3] He died of an injury involving a horse while preparing for the 2007 Stanford U.S. Open championships at the Palm Beach International Polo Club on April 5, 2007.