The Buntin Group has added two senior management executives. Pat Harris has joined the Nashville, Tenn., agency as vice president, group creative director. Previously, Harris was an art director at Ground Zero in Los Angeles. Richard Sylvester has been named vice president, management supervisor at Buntin. He will handle the shop's O'Charley's account. Prior to joining Buntin, Sylvester was an account supervisor at GSD&M in Austin, Texas, where Frito-Lay's Tostitos was one of the accounts he handled.