Yooshin Engineering Corp. engages in the provision of engineering and construction consulting services. It operates through the following business areas: Transportation, Structure, Geotech and Geology, Water Resources, Land and Site Development, Environment, Overseas, and Construction Management. The Transportation business provides transportation planning and detailed design for highway, railroad, airport, and harbor construction. The Structure business provides planning, design, and construction supervision of long-span marine, pedestrian, general road, and general railway bridges. The Geotech and Geology business performs ground survey and analysis works and planning services for tunnels. The Water Resources business contributes to development and management of water resources. The Land and Site Development business engages in urban planning and site development and design. The Environment business provides maintenance services on water supply, sewerage, and environment plants. The Overseas business provides consulting services to overseas market. The Construction Management business provides construction supervision services. The company was founded on January 17, 1966 and is headquartered in Seoul, South Korea.