Industry veteran John J. Diez named to top financial role; Ryder operations leader Tom Havens appointed head of fleet business Ryder System, Inc. (NYSE: R), a leader in supply chain , dedicated transportation , and fleet management solutions, today announces the appointment of John J. Diez to executive vice president and chief financial officer (CFO). Mr. Diez succeeds Scott T. Parker, who resigned from his position to pursue other opportunities and will remain with Ryder through June 4, 2021 to ensure a smooth transition. Ryder System, Inc. (NYSE: R) appoints John J. Diez to its top financial role as chief financial officer (CFO). (Photo: Business Wire) Mr. Diez, most recently president of Ryder’s Fleet Management Solutions (FMS) business, will oversee all of Ryder’s financial management