 Large was a Chartered Engineer, a Fellow of the Institution of Mechanical Engineers and a Fellow of the Royal Society of Arts.He advised the Government of Gibraltar on nuclear safety aspects of the repairs being undertaken to the nuclear propulsion reactor on board HMS "Tireless" during 2000.Large formed and led the nuclear risk assessment team involved in raising of the sunken and severely damaged Russian nuclear submarine "Kursk" in 2001 - the world's first successful recovery of a nuclear powered submarine.