The United States hosts numerous world-class civil engineering and heavy infrastructure enterprises responsible for designing and executing complex public works, transportation networks, and environmental projects. Prominent firms dominating this sector include AECOM, Jacobs Engineering Group, Kiewit Corporation, Bechtel, Fluor Corporation, WSP USA, Black & Veatch, HDR, Inc., Parsons Corporation, and Skanska USA. These engineering giants collaborate closely with state departments of transportation, federal agencies, and private developers to engineer resilient bridges, highways, airports, water treatment plants, and mass transit corridors.