The company's main manufacturing facility is located in Montreal, Quebec with additional facilities located in Ottawa, Ontario and Sugar Grove, Illinois.

In December 1999, BAE Systems purchased GEC's 51.6% share of CMC in a separate transaction.

In February 2000 the company changed its name to BAE Systems Canada.

In April 2001, ONCAP (an investment group comprising Onex Corporation and other investors) completed its purchase of BAE Systems Canada.

In 2007, CMC Electronics was sold to Esterline Corporation.