03/21/2011 12:00:00 AMMichaelMaddox1973Michael Maddox, Duncanville was appointed platinum marketing underwriter in the Dallas Core Service Center of Amerisure Mutual Insurance Co. He joined Amerisure in 1990 and has been recognized twice as a finalist for the Marketing Underwriter of the Year in Amerisure’s Champions Through Excellence program.Yesclass-notes