Ash Grove family of companies, including Ash Grove Cement Company, Ash Grove South Texas, LLC, Sapphire Americas LLC, Oldcastle Cement Holdings, Houston Cement Company, and Suwanee American Cement Company, is one of North America’s leading cement manufacturers, with a legacy of innovation and excellence dating back to 1882. The Quarry Supervisor coordinates and supervises quarry operations to ensure an adequate amount of raw material from the quarry is available to meet plant production needs.