UnitedHealth Group announced that Timothy P. Flynn has joined the company’s board of directors. Flynn is a member of the board of directors of JPMorgan Chase & Co., Wal-Mart Stores, Alcoa and a member of the board of trustees of the University of St. Thomas, St. Paul, Minn. He has previously served as a member of the board of directors of the Chubb Corporation from 2013 until its acquisition by ACE Limited in January 2016.