Arch Coal, Inc. announced that its board of directors has elected Paul T. Demzik as the company's chief commercial officer, effective immediately. Prior to joining the company, Demzik was head of thermal coal trading at Anglo American for five years and president of Peabody COALTRADE for seven years. Demzik will report to Paul A. Lang, it's president and chief operating officer. In addition to his previous roles at Anglo American and Peabody, Demzik has held leadership positions in trading, marketing and procurement at EdF Trading Limited, Transcor Corporation, Phibro Inc., and Koch Carbon, Inc. during the course of his career.