Thomas J. Riordan is a former Terex and SPX executive Former Terex Corp. president and chief operating officer Thomas J. Riordan is the new president and CEO of Neenah Enterprises Inc. Neenah Enterprises Inc. is a holding company for several gray and ductile iron foundry operations, including Neenah Foundry Co., in Neenah, WI; Advanced Cast Products in Mercer, PA; Dalton Foundry in Fort Wayne, IN; and…