Holtec Gas Systems, a certified designer and manufacturer of advanced nitrogen generators, has announced an investment of around $3 million to purchase and update a 50,000-square-foot facility to expand in St. Charles. Holtec celebrated 20 years in business in 2019, and moved out of a nearly 7,000-square-foot facility in Chesterfield, MO on June 11, 2020. Read More…