Jack is an Operating Partner at TruArc Partners, working with the firm's tech-enabled business services portfolio companies. He currently serves as Executive Chairman of Lamark Media Group.

Prior to joining TruArc, Jack built a forty-year career at the intersection of media, marketing, and advertising technology. Most recently, he served as General Manager of the US Agency Business at TikTok, where he led a multi-billion dollar agency practice across SMB, mid-market, and large agency holding companies. Before TikTok, Jack served as Global Chief Revenue Officer at Captify, a cookieless search-intelligence platform backed by SFW Capital Partners, and previously as Chief Commercial Officer at Amobee, where he drove the company's commercial expansion into advanced TV and programmatic advertising.

Jack began his career at Interpublic Group and went on to hold senior leadership roles at Bertelsmann, Meredith Corporation, Time Warner, Dentsu, and WPP — among them an early chapter working with Ashton Kutcher at Katalyst in the nascent days of social media — before spending six and a half years at AOL and Verizon Media.

Jack is Past Board Chair of the American Advertising Federation, past Board Member of Effie Worldwide, and current Treasurer of the Effie Lions Foundation. He holds a Bachelor of Journalism from the University of Missouri–Columbia.