Federal Signal Corp. engages in the design and manufacture of products and integrated solutions for municipal, governmental, industrial, and commercial customers. The company is headquartered in Oak Brook, Illinois and currently employs 4,100 full-time employees. The company operates through two segments: the Environmental Solutions Group and the Safety and Security Systems Group. The Environmental Solutions Group is a manufacturer and supplier of a full range of street sweepers, sewer cleaners, industrial vacuum loaders, safe-digging trucks, high-performance water blasting equipment, road-marking and line-removal equipment, dump truck bodies, trailers, and metal extraction support equipment. The company manufactures vehicles and equipment in the United States and Canada that are sold under the Elgin, Vactor, Guzzler, and TRUVAC brand names. The Safety and Security Systems Group is a manufacturer and supplier of comprehensive systems and products that law enforcement, fire rescue, emergency medical services, campuses, military facilities, and industrial sites use to protect people and property.