Yeah, most heavy industries like mining, power generation, large engine driven pumps, engines on vessels, etc etc.. have CAT engines. Theres three major engines used in these industries, Caterpillar, Cummins, and Detroit Deisels(or larger versions are called EMD's(ElectroMotive Division) owned by General Motors). The two major ones are Detroit Diesels and Caterpillar. caterpillar sells their engines through dealers like Finning here in BC and Alberta.. big in mining, and industry like earthmovers.. building the sea to sky for example.