ABM Industries Incorporated, through its subsidiaries, engages in the provision of facility maintenance, engineering and infrastructure solutions in the United States and internationally. The company operates through five segments: Business & Industry, Manufacturing & Distribution, Education, Aviation, and Technical Solutions. It offers janitorial, facilities engineering, and parking services for commercial real estate properties, including corporate offices for high-tech clients, sports and entertainment venues, and traditional hospitals and non-acute healthcare facilities; and vehicle maintenance and other services to rental car providers.