Kammala jumla mai zuwa: Dubberley ya yi ritaya daga gasar a shekara ta 2006 kuma a watan Nuwamba na wannan shekarar an nada shi a matsayin babban kocin kungiyar Rugby ta Wheelchair Rugby ta Australiya. Ya horar da tawagar zuwa lambar azurfa a Wasannin Beijing na 2008 da kuma Gasar Rugby ta Wheelchair Rugby ta Duniya ta 2010. Yana shirya tawagar don
Wasannin Landan na shekarar 2012. Ya horar da tawagar kwallon kafa ta Australia a gasar Paralympics ta 2012, wanda ya shiga gasar cin kofin kwanaki biyar ba tare da nasara ba kuma ya lashe lambar zinare. Ya kasance babban koci a gasar Paralympics ta Rio ta 2016 inda kungiyar ta lashe zinare.