Christoph Vielhaber

RheinEnergie AG engages in the production, trading, network operation, as well as distribution of energy and water. Its products include electricity, natural gas, water, district and local heating, as well as steam. The firm also provides energy-related services. The company was founded in 1863 and is headquartered in Cologne, Germany.

NetCologne Gesellschaft für Telekommunikation mbH provides telecommunication services. It operates self network telecommunications and provides services in all areas of communications like voice, data and internet. The company was founded on October 31, 1994 and is headquartered in Cologne, Germany.

AggerEnergie GmbH provides environmentally friendly electricity, gas, and water to the region while also supporting social projects. AggerEnergie is based in Gummersbach, DE and ultimately controlled by the City of Cologne. The German company offers reliable natural gas at fair prices for businesses and commercial customers, including small and medium-sized enterprises, industries, and associations. The company encourages customers to switch to regional electricity and become active participants in the energy transition. The company was founded in 1926, and the CEOs are Frank Röttger and Uwe Töpfer.

GEW Köln AG is a subsidiary of Stadtwerke Köln GmbH and is based in Cologne, Germany. The German company is primarily involved in providing energy services. According to their company description, GEW Köln AG is a subsidiary of Stadtwerke Köln GmbH, which is ultimately controlled by the City of Cologne. Dieter Steinkamp has been the CEO of the company since 2007.

Energieversorgung Leverkusen GmbH & Co. KG (EVL) is a modern energy service provider that offers tailor-made products and comprehensive services to its business customers. The company is based in Leverkusen, Germany and is ultimately controlled by the City of Cologne. The CEOs of the German company are Thomas Eimermacher, Ulrik Dietzler.

BELKAW GmbH provides electricity, water, and gas to corporate and private customers. The company was founded on April 1, 1914 and is headquartered in Bergisch Gladbach, Germany.

Rheinische NETZGesellschaft mbH is a network operator that provides secure gas and electricity supply in and around Cologne. The company is based in Cologne, Germany. The German company offers information on network charges, gas prices, special fees, and balancing parameters. The company is a subsidiary of the City of Cologne. The CEOs of the company are Ulrich Groß, Karsten Thielmann.

Gasversorgungsgesellschaft mbH Rhein-Erft is a German energy company that offers the best tariffs for energy contracts to both private and business customers. The company is based in Huerth, Germany. The company's website, gvg.de, provides information on the different tariffs available. The company was founded in 1956 and the CEOs are Werner Abromeit and Phillip Erdle.

Stadtwerke Lohmar GmbH & Co. KG supplies electricity, natural gas, and water. The company is based in Lohmar, Germany, and has subsidiaries in Germany. The German company was founded in 2011, and the CEOs are Sonja Kreikemeyer and Gregor Laarmann.

BRUNATA-METRONA GmbH is a German company that specializes in issuing energy certificates and providing legally compliant billing for efficient administration and communication with tenants and owners. The private company is based in Huerth, Germany and was founded in 1950. The company also offers regular legionella testing and installation and operation of smoke detectors. The CEOs are Norbert Rolf and Oliver Geer. Rental companies, housing associations, housing companies, and property managers have trusted BRUNATA-METRONA for seven decades.