The security fiasco at last year's Olympic Games was a "significant distraction" for G4S but its core business has managed to avoid any long-lasting damage to its reputation, Nick Buckles CEO at G4S told CNBC Wednesday.

"The Olympics experience was a very tough experience for us,we've had issues but we're putting that behind us. Aside from the Olympics we had good organic growth and that was driven by good performance in U.K.government and U.S. commercial business grew. Developing markets grew by 10 percent which we expect to continue," Buckles said.