Hubert Mattersdorfer

Pro Solar Energietechnik GmbH develops, produces and sells solar heat systems for domestic water & space heating. The company was founded in 1993 and is headquartered in Ravensburg, Germany.

Part of Osterreichische Doka, Doka France SAS is a French company that wholesales wood and building materials. The company is based in Le Perray-en-Yvelines, France. The company was founded in 1956. The CEO is Harald Ziebula.

Part of Umdasch Group AG, Doka Denmark ApS is a Danish company that specializes in providing professional advice and support to contractors. The company is based in Koge, Denmark. The company has a strong network of over 160 distribution and logistics locations in more than 70 countries, ensuring the timely and professional delivery of materials and technical support, regardless of the size and complexity of the construction project. The company offers solutions with architectural concrete that are precisely tailored to each situation and the requirements of the building. Doka offers formwork solutions in all areas of construction, whether it is residential construction, construction of traffic routes, energy supply systems, or the construction of the world's tallest building. The CEO of the company is Robert Hauser.

Doka Sverige AB sells and rents molding equipment. The private company is based in Uddevalla, Sweden. The Swedish company was founded in 1956. The CEO is Robert Hauser.