Leigh C. McMullen is a Distinguished Vice President, Analyst and Gartner Fellow in Gartner's CISO, Security & Risk Management team. Mr. McMullen leverages his experience as both a line-of-business manager and IT leader to provide CISOs with insight on navigating and making a difference within the C-suite.

Additionally, he provides clients with a holistic view of executive management leadership research, specializing on the topics of politics, influence, culture, business engagement, internal selling, marketing & communications. Mr. McMullen's Fellows work, the Delta Business Operating System examines business operating models which are designed to change and adapt rather than just scale.