Mun Siong Engineering Ltd is an integrated service provider. The primary activities involve those of mechanical engineering, provision of specialized services and investment holding. The company has two reportable segments: Mechanical and Electrical, instrumentation and others. Mechanical segment relates to mechanical engineering services of pre-fabrication, installation of piping works and mechanical de-coking, re-tubing and hydro-jetting. Electrical segment relates to electrical and instrumentations services of installing transformers, switchgear, grounding system, distribution control system, and provision of fabrication and installation of marine and industrial engineering works. The mechanical segment generates most of its revenues mainly from Singapore.