Jack is a member of the Young Executive Board of Row New York, a robust rowing and academic program for young people in New York City's under-resourced communities; a member of the Board of Directors of the United States Lightweight Rowing Association, a non-profit dedicated to helping the United States win medals at the World Championships and Olympic Games and to supporting U.S. athletes in training; and a member of the Board of Directors of the National Civic Art Society, an educational non-profit dedicated to promoting and protecting America's public monuments.

Jack is an Elite Athlete Member of the New York Athletic Club and is proud to represent the N.Y.A.C. on the U.S. national rowing team.  He is also a member of the Explorers Club, a Fellow of the Royal Asiatic Society and a Fellow of the Royal Numismatic Society.

A lifelong vegetarian, Jack is a keen supporter of The Farm Sanctuary.  Jack has also hosted charitable book events in support of Row New York and The Stewards' Charitable Trust.