Wolverine World Wide’s president in charge of the Merrell and Chaco brands is retiring at the end of this year. Scott Sible took over Merrell’s U.S. operations in 2002, and in 2005 was handed responsibility for the brand globally. He was president of Wolverine’s Outdoor Group from October 2007 to March 2009, when Jim Zwiers took over. Zwiers will now take up Sible’s duties at Merrell.