Nikolaus Meyer

Geo-En Energy Technologies GmbH provides geothermal energy management solutions. It specializes in the design and production of heating and cooling solutions, with the development and utilization of geothermal energy. It engages in partnerships with engineers, heating and air-conditioning specialists, heat pump manufacturers, well construction specialists, and energy advisers. The company was founded by Tobias Viernickel, Pieter Bots, and Michael Viernickel in 2007 and is headquartered in Berlin, Germany.

Part of E.ON SE, HanseWerk Natur GmbH is a German company that distributes electricity, gas, and steam. The company is based in Hamburg, Germany. The CEOs are Thomas Baade, Gerta Gerdes-Stolzke. The company was founded in 1927.

McKinsey GmbH & Co. KG provides business consulting services. The company was founded on October 18, 2011 and is headquartered in Düsseldorf, Germany.

Soltecture GmbH developed and manufactured thin-film solar modules based on chalcopyrite-type semiconductors. The company was founded in 2003 and was headquartered in Berlin, Germany.