These are the leaders who empower our team.
Mark is CEO at StumbleUpon Inc. Prior to being StumbleUpon CEO, he was StumbleUpon's Chief Financial Officer and a member of the San Francisco M&A team at Deloitte USA. Mark has experience in Consumer Web and Tech M&A. He is an investor in Consumer Web and Ad Tech companies in San Francisco and Boston. Mark holds a Bachelor of Commerce Degree and PGDA from the University of Cape Town and is a qualified Chartered Accountant.
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David is the VP of Product at StumbleUpon where he leads its product and design team across web, mobile, and revenue products. Prior to joining StumbleUpon, David was the cofounder and CEO of Loomia, one of the first content discovery networks. He has also led new product initiatives for organizations ranging from startups and agencies to non-profits.
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Paul Antaki is the VP of Engineering at StumbleUpon where he oversees all development
and engineering efforts. With more than 15 years of experience as an engineering leader and
software engineer, Paul has managed 60+ people as well as multi-million dollar budgets and
projects. He’s successfully delivered products for companies as diverse as Salesforce.com,
Google, and JPMorgan Chase & Co.
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Greg Isenberg is the Founder & CEO of 5by - a mobile app that delivers the best videos
on the internet. Since the age of 13, Greg has been building and scaling internet products to millions of users. He has built and exited several companies and continues to invest as a Venture Partner at Indicator Ventures, a NYC-based early stage venture fund. Greg is a Mentor at the Founder Institute and an Investor in companies including Circa, Quietly, Everest and Jack Erwin.
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