Oldcastle Inc. President and CEO Mark Towe will assume a new role in January, CRH Americas chairman, teaming with CRH Plc Chief Executive Albert Manifold to support performance and excellence programs across the group, and continuing as an executive director. Towe joined Atlanta-based Oldcastle in 1997, and advanced in the Materials hierarchy with appointment as president in 2000 and chief executive officer in 2006. Two years later, he was elevated to his current position and attendant CRH board post.