Frank Calandra, Inc was formed in 1922 by Frank Calandra Sr and Mary Calandra, its two common shareholders.  The primary purpose of the proprietorship was to buy and sell scrap to the Pittsburgh area steel producers.  Frank Calandra, Inc evolved over the years into mining distribution to the local coal mines near Cresson Pa.  Rail products were its primary focus until 1965.  Frank Calandra Jr., changed the focus to roof support products in 1965.  In 1972 Frank Calandra Jr and his brother Jack Calandra formed JENNMAR, a subsidiary of Frank Calandra, Inc.  Today Frank Calandra Inc (FCI), major investments house companies JENNMAR, JLOK, and JM Steel.

Calandra Group was formed by Tony Calandra in 2013 to house the Calandra’s future investments in Chemical Manufacturing, Metal Cutting, Industrial Fabrication, Machining, Labor Services, Oil and Gas, and Conveyence industries.  Today, Calandra Groups (CG) major investments include JENNCHEM, JM SANSHELL, JM McSweeney’s, JENNMAR Services, and JM Conveyors.