Line of Business: Aggregates About Us Heidelberg Materials is one of the world's largest suppliers of building materials. Heidelberg Materials North America operates over 450 locations across the U.S. and Canada with approximately 9,000 employees. What You'll Be Doing Inspect, troubleshoot, and repair crushers, conveyors, screens, feeders, and other aggregate processing equipment.Perform preventive maintenance to support safe, efficient aggregate production during second shift operations.Diagnos