CMC Electronics is a world leader in the design, manufacture, sales and support of high-technology electronics products for the aviation, marine and global positioning markets. The company's principal locations are in Montreal, Ottawa and Chicago. Formerly known as the Canadian Marconi Company, CMC Electronics has been designing and building innovative communication and electronics systems since 1903. CMC is a wholly owned subsidiary of Esterline Corporation - a specialized aerospace and defence company headquartered in Bellevue, Washington. Esterline employs over 10,000 people worldwide.

In NL, CMC Electronics provides sales and service for marine electronic products to a broad range of industrial customers, such as oil and gas, marine transportation, fishing, and marine recreation companies, as well as government agencies.