Thermal Process Holdings, a portfolio company of Calvert Street Capital Partners, acquired Certified Heat Treating of Springfield, Ohio. Certified Heat Treating represents the second investment in Thermal Process Holdings’ strategy to build a leading independent thermal-processing company focused on value-added services. 

Don Longenette, who will initially serve as general manager for Certified Heat Treating, said: “The operating history of Certified dates to 1959, and the company has a solid reputation in the broad spectrum of industries it serves. Our goal with Certified is to use their high-quality equipment and employee expertise to take advantage of the open capacity of the furnaces.”

Calvert Street Capital Partners acquired Diamond Heat Treat of Rockford, Ill., in June 2017.