HolcimUS
John Themig is an experienced professional in the mining and materials industry, currently holding the position of Senior Area Operations Manager at HolcimUS. Throughout their career, John has held various management positions at companies such as Heidelberg Materials North America, Lehigh Hanson, Rogers Group Inc., and Vulcan Materials Company. John has a BS in Mining Engineering with a Quarry Emphasis from Missouri University of Science and Technology.
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