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Leadership Team

An entrepreneur since fifth grade, Paul Chambers is the President and Co-Founder of the Subscription Trade Association (SUBTA) and CEO and Founder of Core3 Solutions, a parent company to Element5 Digital, Gentleman’s Box, Rocket Effect, Moka Boka, and Unity Management System. Paul has extensive expertise in the subscription economy and digital marketing, dating back more than two decades, and he has been recognized by Crain’s Detroit Business as a 20 In Their 20’s. In his spare time, Paul is a firefighter in the City of Troy and loves to spend time with the world’s most amazing wife, twin daughters, and two sons.

Paul Chambers

Co-Founder and CEO, SUBTA

John Haji is one of the co-founders of The Subscription Trade Association (SUBTA). Also an operation guru, John oversees operations and logistics for all association related events, including SubSummit and Recur.

John Haji is also the co-founder and COO of the Gentleman’s Box.

John Haji

Co-Founder, SUBTA

Serial entrepreneur and business development leader. Co-founder and secret sauce of multiple subscription businesses including Gentleman’s Box and Subscription Summit.

Christopher George

Co-Founder and Chairman, SUBTA