Tuksu Engineering & Construction, Ltd. is an engineering and construction company based in Seoul, South Korea, operating both domestically and internationally. It builds infrastructure such as railway and road underpass structures, large-diameter bridge foundations, shield tunnels, underground slurry walls, subways, and residential land, as well as water and sewage pipeline management systems. The company also manufactures and installs planters for vehicle-related painting processes and environmental facilities, and offers construction machinery, machine devices, and tools. It was founded in 1971.