Philanthropy strategist, Rhodes Scholar, and co-author of "How Luck Happens." Served as a senior executive and later executive vice president at the John Templeton Foundation, a large charitable fund supporting science and religion research. Met Jeffrey Epstein roughly two dozen times between approximately 2013 and 2017, often for breakfast or salon-style gatherings at Epstein's Manhattan townhouse where wealthy donors, academics, and consultants convened to discuss philanthropy and big ideas. Introduced Deepak Chopra to Epstein as a potential funder of brain and consciousness research.
Attended, as a representative of the Templeton Foundation, meetings that Epstein held at MIT Media Lab. Mentioned more than 4,600 times across the Epstein files. In a 2017 email, Marsh forwarded Epstein an article about "baby smell." His association with Epstein drew scrutiny following the 2026 DOJ document releases, given his role as a bridge between Epstein and elite academic and philanthropic institutions.