Hiap Seng Engineering Ltd is an investment holding company, which provides mechanical engineering services, plant fabrication, and installation and plant maintenance for the petroleum and petrochemical industry. Its segments include Plant construction and maintenance, and compression and process equipment fabrication. The segments operate through geographical areas, such as Singapore, Malaysia, Thailand, The People's Republic of China and Other countries, including Vietnam. In Singapore and Other countries, it provides mechanical engineering services, plant fabrication, and installation and plant maintenance, fabrication of compression and process equipment. In Malaysia, it provides mechanical engineering services, plant construction and plant maintenance. In Thailand, it provides mechanical engineering services, plant fabrication and installation, among others. In the People's Republic of China, it provides fabrication of compression and process equipment.