McGahey, a former plant manager of the Mitchell cement plant in Indiana, is now Vice President of Cement Operations Northeast, based in Pennsylvania, after more than 22 years' industry experience.
Miller, with over 37 years' experience in cement production, has been promoted from Assistant Plant Manager to Plant Manager.
Hall, former Saftety Manager, is now Assistant Plant Manager, after 21 years' cement industry and management experience.
"Quentin, Jerry, and Cody have been instrumental to the Lehigh Cement Co.," said Tom O'Neil, Vice President of Cement Operations Midwest. "We are proud to recognise their contributions with these promotions".