David Gregg is an experienced engineering professional with a strong background in managerial roles across various companies in the manufacturing and mining sectors. Currently, David serves as the Engineering Manager at GAF since February 2023. Prior to this, David held the position of Assistant Plant Manager at James Hardie from May 2022 to March 2023 and was an Engineering Manager at TCI Manufacturing from August 2020 to May 2022. David's earlier roles include Regional Mine Manager and Plant Manager at U.S. Silica Company, as well as Asset Management Engineer at the Metropolitan St. Louis Sewer District. David's experience began at Unimin Corporation as a Mining/Production Supervisor, progressing through various supervisory positions focused on operations, quality control, and safety. David holds a Bachelor's degree in Mechanical Engineering from Southern Illinois University, Carbondale, completed in 2012.
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