Federal Signal Corporation is a global corporation with about 3200 employees located in Oak Brook, Illinois. Federal Signal designs, develops, and manufactures security systems, fire rescue products, street sweepers, and industrial vacuums. The company operates in two segments: Environmental Solutions Group and Safety and Security Systems Group. The Environmental Solutions Group segment manufactures and supplies a range of street sweepers, vacuum trucks, and other specialty vehicles. The Safety and Security Systems Group segment offers systems and products for campus and community alerting, emergency vehicles, first responder interoperable communications, and industrial communications.