What: VP-chief marketing and sales officer Where: DuPont, Wilmington, Del. Why: Coleman, who has been in his position since February 2011, leads all brand and marketing services for DuPont. A key challenge for him has been transforming DuPont’s image from that of a chemical company to a science company. Last year, he oversaw the debut of “Welcome to the Global Collaboratory,” an integrated campaign showing how DuPont is helping solve global challenges such as food, fuel and safety.