Bob Monnig Industries, Inc. was founded in 1960 on the basis of great customer service by a young, Glasgow entrepreneur, Robert “Bob” Monnig. In order to meet the high demands for steel preservation at that time; Bob created a galvanizing industrial plant in the small mid-Missouri town. Haven Cooling Towers started things off, becoming Monnig Industries first client. As time went by, and the galvanizing industry grew, more and more steel fabricators would bring their materials to be galvanized at Monnig Industries.

After becoming Incorporated in 1986, Monnig Industries had established itself as the premier job-shop galvanizer in the Midwest. In 1986 a second kettle was added to the operation to further the production and galvanization process. Years later, mechanical galvanizing was added, followed by a third kettle to keep pace with the demand in 2006.