ATLANTA--(BUSINESS WIRE)--Dell SecureWorks, an information security services provider, today announced it has been positioned by Gartner, Inc. in the “Leaders” quadrant of the Gartner Magic Quadrant for Managed Security Services (MSS), Worldwide (December 2014).1 The Gartner Magic Quadrant is a graphical portrayal of vendor performance in a market segment, including categories for leaders, challengers, visionaries and niche players. Criteria by which the vendors are measured include a company's