Des Moines, Iowa—Lessing-Flynn Advertising Co. celebrated its 100th anniversary at a celebration Nov. 30 with clients, customers and business partners. Its clients include Vermeer Manufacturing Co., which has been a client for 60 years. Also, Lessing-Flynn announced that Tom Flynn, great-grandson of agency co-founder Roy Flynn, will take over as president Jan. 1. He will succeed Connor Flynn and Joe Rosenberg, who have jointly been managing the agency for 25 years. Connor Flynn will become chairman, and Rosenberg will become vice chairman.