Spencer Mateega
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Spencer Mateega is the co-founder and CEO of AfterQuery, an applied research lab that curates data solutions for frontier foundation model development. He is building AfterQuery after previous internships in technology private equity at Silver Lake, technology investment banking at Morgan Stanley, and software engineering at Meta and Google. He studied for a B.S. in Finance and Statistics at Wharton and an M.S. in Computer Science at Penn. He is known for leading AfterQuery’s work serving frontier AI labs with training data.
Updated 4 September 2026
Public sources: ycombinator.com
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