Civil engineers work on roads, bridges, airports, water supply systems, dams, and tunnels. They also contribute to urban development and environmental projects aimed at sustainable infrastructure.Civil engineers work on roads, bridges, airports, water supply systems, dams, and tunnels. They also contribute to urban development and environmental projects aimed at sustainable infrastructure.Civil engineers work on roads, bridges, airports, water supply systems, dams, and tunnels. They also contribute to urban development and environmental projects aimed at sustainable infrastructure.Civil engineers work on roads, bridges, airports, water supply systems, dams, and tunnels. They also contribute to urban development and environmental projects aimed at sustainable infrastructure.