PLANT OPERATOR - (Thatcher Company) Thatcher Company is a chemical manufacturing, blending, re-packaging and distribution company. Thatcher Company is well-known in the intermountain area and other areas of the United States as a partner with multiple companies and industries in supplying them with their chemical needs. As a Plant Operator you work as part of an operations team to effectively and efficiently to manufacture, blend and re-package chemical products for distribution through various venues.