Global DataGuard: Masergy makes security play by buying Global DataGuard

With its acquisition of Global DataGuard, Plano-based managed network and cloud services provider Masergy Communications has materially upgraded its security service capabilities, the company’s top executives say. “This is a game-changer in the way security gets delivered, not only as a company but as an industry,” John Dumbleton, Masergy’s senior vice president for business development, told me in a recent interview. The massive data breach at Target and cyber attacks on other retailers…