Any private company with sufficiently large compounds has its own fire department(s). To pick a few random examples, Boeing, FedEx, Lockheed Martin, ExxonMobil,

Any private company with sufficiently large compounds has its own fire department(s). To pick a few random examples, Boeing, FedEx, Lockheed Martin, ExxonMobil, Electric Boat, Pratt & Whitney all have at least one.