Harri Tapani Järvenpää

GS-Hydro Oy supplies non-welded piping systems, prefabricated piping modules, and separate piping components. Its piping system is ideal for hydraulic and other low and high pressure applications. The firm also provides flange technology. The firm's products include retain ring systems, and tubes and pipes, multicore tubes, clamps, valves, bite type fittings, flare fittings, hoses and couplings, adaptors, and machines. The company was founded in 1974 and is headquartered in Espoo, Finland.

Gasum Oy imports natural gas and maintains gas transmission network. It sells liquefied natural gas and compressed natural gas to the customers, including restaurants, households, small houses, traffic, heating, local and district heat. The company was founded in 1994 and is headquartered in Espoo, Finland.

Senaatti-kiinteistöt provides property management services. It lets, maintains, and develops the property assets of the Finnish state. The company offers its services to government bodies and institutions. Senaatti-kiinteistöt was founded on September 3, 1811 and is headquartered in Helsinki, Finland.