Holcim Ltd said Bill Bolsover, chief operating officer of recently-acquired Aggregate Industries, will become the unit’s chief executive. Bolsover was also named area manager for Holcim’s aggregates and ready-mix activities. Bolsover will replace current Aggregate Industries CEO Peter Tom, who will become the unit’s Non Executive Chairman. Aggregates Industries board member Norman Fowler will be appointed to Holcim’s board of directors.