Jason Gray
Founder & Managing General Partner at Pioneer Fund; YC alumnus
jasongray
Toronto, Ontario, Canada
Joined May 2024
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Summary
Operator turned investor: Jason moved from leading large energy operations to early‑stage investing. He built SunEdison’s Canadian business (P&L, project development, module sales and a manufacturing facility) and now runs Pioneer Fund, focusing on supporting YC startups as a founder/manager of a YC‑alumni fund. marsdd+2
Social‑impact solar entrepreneur: As co‑founder of SunFarmer, Jason helped design and deploy solar systems and financing models for clinics and schools in Nepal and Southeast Asia, including emergency relief after the 2015 Nepal earthquakes; SunFarmer’s work emphasizes sustainable, locally‑maintained systems and long financing terms to make larger systems affordable. sunfarmer+2
Early‑stage network builder within the YC ecosystem: Jason is a YC S15 alumnus (SunFarmer) and runs Pioneer Fund, which pools YC alumni capital and expertise to invest in YC startups — positioning him as a connector between operators and founders in the YC community. ycombinator+2
Work
Education
Projects
Notes
NPNikhil Panditsaid that if they were joining a YC batch,
JGJason Gray
would be at the top of their list of investors to reach out to.Dec 11, 2025
NPNikhil Panditsaid they've seen
JGJason Gray
lead major investment decisions that drove strong outcomes for a private equity firm.Nov 1, 2025
MPMatt Puchalskisaid that if they needed strategic guidance on a challenging investment,
JGJason Gray
would be among their top choices in private equity.Oct 31, 2025
DMDave Messinasaid they've seen
JGJason Gray
's leadership make a clear positive difference at their professional service firm.Jul 15, 2025