Hiap Seng Industries Limited engages in the provision of building construction, engineering, procurement, and construction and plant maintenance services for the oil and gas, and energy sectors in Singapore and internationally. The company offers engineering, procurement, and construction services, including modular compression, process equipment installation, pressure vessels, process piping, and tanks and terminals services for the oil and gas, petrochemical and chemical, power and utilities, and pharmaceutical industries. It also provides routine daily maintenance, total integrated plant maintenance, and turnaround maintenance services in the refineries, petrochemical/chemical complexes, pharmaceutical, and power/utilities plants; and undertakes mechanical, E & I and civil/buildings, refractory, insulation, and blasting/painting works, as well as offers scaffolding services. In addition, the company engages in the provision of mechanical engineering, plant fabrication, installation, and plant maintenance services for the oil and gas, and petroleum and petrochemical industries. Further, it engages in the provision of process and industrial plant engineering, and consultancy services. The company was founded in 1950 and is based in Singapore.