Heiner Krietenbrink

GELSENWASSER Energienetze GmbH is a German company that provides energy and water supply services. GELSENWASSER Energienetze is based in Gelsenkirchen, DE and ultimately controlled by the City of Dortmund. The company offers in-house and digital services, as well as training positions in technical and commercial areas. The company is gradually expanding its wiki to explain terms from their everyday work. The company also provides practical tips for everyday life and background information on energy savings. The CEOs of the company are Heiner Krietenbrink and Thilo Augustin.

Stadtwerke Kalkar GmbH & Co. KG is a utility company that provides electricity, water, and heat services. The company is the main gas supplier in the Stadt Kalkar area and offer installation services for households. The company is based in Kalkar, Germany. The German company is ultimately controlled by the Stadt Kalkar. The CEO of the company is Alina Ahrens.

NiersGasNetze GmbH & Co. KG is a German company that supplies gas. The private company is based in Kevelaer, Germany. The CEOs are Christian Creutzburg, Hans-Josef Thönennis. The company was founded in 2016.