Hassan is the retired managing partner and one of the co-founders of Independent Franchise Partners LLP, a London-based investment firm. Prior to Franchise Partners he was a managing director at Morgan Stanley Investment Management.

He holds an AB in Economics and an MBA in Finance, both from the University of Chicago.  Hassan served on the board of directors of Human Rights Watch from 2007-2019, including six years as co-chair. In addition to ClientEarth, he serves on the board of Choose Love.