Bill spent his childhood in Greenwich, where he attended the Brunswick School, was matriculated at Southern Methodist University, where he was student body Treasurer and earned an MBA at the Kellogg School of Management at Northwestern University. He held a senior finance role in the 1992 Republican National Convention for George H.W. Bush's re-election campaign and went on to a successful career on Wall Street, where he worked for Goldman Sachs, AIM Management, Nicholas-Applegate Capital Management, and Credit Suisse First Boston. Bill is survived by his father, William A. Arnold III, and his sister Lorraine Arnold Sullivan, as well as his former wife, Lisa H. Arnold. He was predeceased by his mother, Ann Kies Arnold (a life-long resident of Greenwich), his paternal grandparents William A. Arnold II and Eleanor Flick Arnold, and his maternal grandparents William S. Kies, Jr. and Janet Mitchell Jacobsen, as well as his loving step grandmother Lorraine Kies.