Mark Towe is Chief Executive Officer of Oldcastle, Inc., the North American arm of CRH plc, one of the world’s leading building materials companies based in Dublin, Ireland. Mark also serves as a CRH Board Member. Mark joined Oldcastle as Chief Operating Officer of the Materials Group.

Doug Black is CEO of Oldcastle Materials. In the 15th year of his Oldcastle career, Doug leads an exceptional team operating in a decentralized family of companies – joined by a common strategy and operating fundamentals that drive world-class performance for all stakeholders....