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John is a tech investor, founder, and CEO with decades of experience in funding, launching, and leading companies. As an entrepreneur and CEO, he focused on database technologies, including Tokutek (as CEO) and StreamBase Systems (as Co-founder) with Turing Award-winner Michael Stonebraker. At Accel Partners and Summit Partners, he sourced and/or led investments in Rapt Corp. (acq. by MSFT), Counterpane Internet Security, and comScore. He now focuses on foundational and infrastructure technologies such as machine learning, blockchain, and databases. He has an undergraduate degree in Applied Mathematics from Harvard and an MBA from Stanford.