Matti Kuivalainen

Rettig Group Oy AB manufactures hydronic and electrical heating products. It involves in the research and development, design, procurement and production, logistics, and sale and marketing of radiators, towel warmers, underfloor heating products, convectors, valves and controls. The company was founded in 1770 and is headquartered in Helsinki, Finland.

DYWIDAG-Systems International GmbH engages in the development and manufacture of products and systems for the construction industry. Its product portfolio includes strand and bar post tensioning, stay cable, and anchor and pile systems; lifting and fixing tools; as well as chemicals for concrete structures. The firm also provides services such as repair and strengthening of bridge structures, stay cable repair, reinforcement of foundations, and inspection of civil engineering structures. The company was founded in 1979 and is headquartered in Munich, Germany.

DYWIDAG-Systems International Pty Ltd. manufactures and supplies strata reinforcement products. It provides customers with engineered and systems for post-tensioning, geotechnical applications, global services and concrete accessories. The company was founded in 2002 and is headquartered in Bennetts Green, Australia.

DSI Holding GmbH develops and distributes post-tensioning and geotechnical systems for the construction and underground engineering industries. The company was founded on July 8, 2005 and is headquartered in Munich, Germany.

DSI International Luxembourg SARL engages in the provision of construction and mining services. The company is headquartered in Luxembourg.