Wison Engineering Services Co. Ltd., an investment holding company, provides chemical engineering, procurement, and construction management services in Mainland China, the United States, the Middle East, Europe, and internationally. The company operates in two segments, Engineering, Procurement and Construction; and Engineering, Consulting and Technical Services. It provides a range of integrated services, including feasibility studies; consulting; proprietary technologies; design, engineering, and raw materials and equipment procurement; construction management; and maintenance and after-sale technical support services. The company is also involved in the import, export, and sale of equipment and parts. It offers its services to petrochemical, coal-to-chemical, oil refineries, public infrastructure, and other sectors. The company was formerly known as Wison Energy Services Co. Ltd. and changed its name to Wison Engineering Services Co. Ltd. The company was founded in 1997 and is headquartered in Shanghai, the People's Republic of China. Wison Engineering Services Co. Ltd. operates as a subsidiary of Wison Engineering Investment Limited.