Donald M James, non-executive chairman of US aggregates supplier giant Vulcan Materials, will retire at the end of this month. J Thomas Hill, Vulcan’s president and chief executive, will succeed James as chairman.
James T. Prokopanko, Vulcan's lead director, said: "Don has led Vulcan Materials as the largest aggregates supplier in the US for 18 years, significantly expanding its operations throughout the nation. During that time, he has guided Vulcan through periods of strong growth as well as difficult