Jack is a co-founder of Tenable, Inc (NASDAQ: TENB) and was responsible for driving Tenable's global corporate strategy and organizational growth from 2002 to 2019. Tenable is the Cyber Exposure company. Over 30,000 organizations around the globe rely on Tenable to understand and reduce cyber risk. Tenable customers include more than 50 percent of the Fortune 500, more than 25 percent of the Global 2000, and large government agencies.

Jack currently serves on Tenable's (NASDAQ: TENB), Norfolk Southern's (NYSE: NSC) and Immersive Labs, Ltd's Board of Directors. Jack also serves on the Goldman Sachs Value Accelerator and the President's National Security Telecommunications Advisory Committee (NSTAC). Before co-founding Tenable in 2002, Jack was the Director of Corporate Development for Enterasys Networks. Prior to Enterasys, Jack held various management and sales positions at John Hancock and Marriott Corporation. He received the 2013 Ernst and Young Entrepreneur of the Year Award for defense and security.

Jack holds a B.S. from W&L (1990) and an M.B.A. from Babson College (2000). Jack is married to Katie Huffard and has three sons, Jack, Sam and Brown. They live in McLean, VA.