 Sullivan attended a predecessor school that was amalgamated circa 1990 to form the Sydney Russell School.Sullivan is an Associate Member of the Chartered Insurance Institute, a Fellow of the Institute of Leadership & Management, a Member of the Chartered Management Institute, a Director of the International Insurance Society and former Chairman of The Geneva Association.He also serves on the Business Advisory Committees of the St. George's Society and The British Memorial Garden Trust, on the Board of Directors for Episcopal Charities of New York, and on the Board of Trustees of the American Associates of the Royal Academy Trust.He is a Past President of British American Business Inc. and is a Director of Young Audiences Inc. and Friends of London Youth Inc.