John Mack

Managing Director & Head of Fund Operations

Onex Partners

Joined: 2023

Office Phone:

(212) 582-2211


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Bio

John is a Managing Director and responsible for Onex’ firmwide fund operations including trade operations, treasury, and fund accounting / reporting. Prior to joining Onex, John was Managing Director – Head of Operations at Oak Hill Advisors, where he led all fund operations and served on the Risk, Compliance and other firmwide committees. Previously he worked in various roles at BNY Mellon, Bridgewater Associates and Goldman Sachs. John holds a bachelor’s degree from Siena College and an M.B.A. from Duke University’s Fuqua School of Business.

Education