John Cockerill (formerly known as Cockerill Maintenance & Ingénierie) is a company that provides engineering solutions. It offers electrical maintenance and automation, welding, photovoltaic panel installation, on-site machining, machinery maintenance, and other services. The company also supplies pipework and metallic structures, continuous casting rollers, rolling gantries, slag vessels, reducers, etc. John Cockerill caters to the aeronautics, food processing, petrochemicals, plastics, and mining industries.