EMS Energy Ltd. operates as an investment holding company. It provides designs, manufactures, fabricates and installs engineered solutions and products for the marine, oil and gas industries. It operates through the following segments: Engineering, Procurement and Construction Management (EPCM) Marine and Offshore; EPCM Water Treatment; and Others. The EPCM Marine and Offshore segment provides providing engineering, procurement, construction and management, custom fabrication, maintenance and repair, trading of marine and offshore equipment to mainly the marine and offshore oil & gas companies. The EPCM Water Treatment segment consists of environmental-related technical services for pollution management, water, and waste. The Other segment handles the investment holding activities of the company. The company was founded in 1977 and is headquartered in Singapore.