Cemstone has promoted Mark James to the position of credit manager. James will supervise the company’s customer credit and collection operations for both readymixed concrete and contractor supply stores. He previously served as assistant credit manager at Cemstone. Based in Mendota Heights, Minn., Cemstone operates more than 40 ready-mix concrete plants, sells contractor supplies and materials through 16 stores, and is the nation’s largest distributor of insulated concrete forms. For more, visit www.cemstone.com or call (800) 642-3887.