Securing the future┬áVanguard Security is showing the value of a different approach to security services, as Sean Flynn tells Ruari McCallion. ÔÇ£The security business is changing,ÔÇØ says Sean Flynn, president and CEO of Vanguard Security, Inc. And itÔÇÖs about time, many may feel. The popular image of security is not out of the top drawerÔÇöelderly men with dogs of uncertain temperament and parentage making once-an-hour checks on the fence, equipped with little more than a flashlight and a crackling walkie-talkie donÔÇÖt inspire confidence.