Mun Siong Engineering Limited is an investment holding company. The Company is also engaged in providing mechanical engineering service. It operates in two segments: Mechanical, and Electrical, instrumentation and others. The Mechanical segment includes mechanical engineering services of pre-fabrication, installation of piping works and mechanical de-coking, re-tubing and hydro-jetting. The Electrical, instrumentation and others segment relates to electrical and instrumentation services of installing transformers, switchgears, lightings, lightning protection, grounding system, distribution control system, field instrument, impulse line, calibration and loop check and, provision of design, supply, fabrication and installation of marine and industrial engineering works; rotary engineering services for the installation, replacement and servicing of rotating equipment, such as pumps and compressors, and scaffolding services, which include tower, cantilever and mobile, among others.