HMS Hydraulic Machines & Systems Group plc, together with its subsidiaries, manufactures and repairs various pumps and pumping units, compressors, and modular equipment for oil and gas companies in Russia and internationally. It operates through four segments: Industrial Pumps, Oil and Gas Equipment and Projects, Compressors, and Construction. The company designs, manufactures, and supplies pumping equipment used in oil extraction process, and oil and products transportation and processing; thermal and nuclear power generation; water supply, utilities, and environment; and chemical processing, steel and mining, pulp and paper, food, etc. It also develops, produces, and delivers a range of equipment and services for oil and gas, such as customized skid mounted modular equipment, including water injection stations for oil formation and formation pressure maintenance; oil and gas pumping and processing stations; automated group measuring plants; and chemical dosing units, and measuring and vessel equipment. In addition, the company provides maintenance and overhaul services; and specific oilfield equipment used for oil exploration intensification and efficiency, as well as for current and work over repairs, isolation works, and fracturing. Further, it designs, manufactures, and supplies compressors for a range of process gases; compressor systems; complete compressor stations; and refrigerating machines and units. Additionally, the company offers engineering and construction services for oil, gas, and gas-condensate fields; and production and infrastructural facilities erection for oil and gas, and water industries. It also engages in the development of project documentation; and provision of engineering services. The company was founded in 1993 and is headquartered in Moscow, Russia. HMS Hydraulic Machines & Systems Group plc is a subsidiary of H.M.S Technologies Ltd.