Rüdiger Kiewen

RWE Umwelt West GmbH provides waste management services. The company is headquartered in Grevenbroich, Germany.

Contour, Inc. specializes in design, builds retaining walls and earth retention systems. The company was founded on March 17, 1999 and is headquartered in Douglasville, GA.

EGN Entsorgungsgesellschaft Niederrhein mbH provides waste management services. It focuses on disposal, treatment and recycling, logistics, reusable materials, municipal services, sanitary rental, and other related services. The company was founded by Mathias Trienekens in 1923 and is headquartered in Viersen, Germany.

Wohnstätte Krefeld, Wohnungs-Aktiengesellschaft is a company based in Krefeld, Germany and was founded in 1897. The German company provides good and affordable housing with over 8,900 apartments in its portfolio and more under construction. The company's services include a repair request form for tenants. The company is ultimately controlled by the City of Krefeld.

Hans Böckler Stiftung (Research Firm) (HBS-Research) is the investment research firm division of Hans Böckler Stiftung, a co-determination, research and study funding organization headquartered in Dusseldorf, Germany. Founded in 1977, HBS-Research supports third-party research projects and conducts its own research with its scientific institutes.

Part of E.ON SE, E.ON Solutions GmbH is a holding German company that provides management services. The company is based in Essen, Germany. The CEOs are Frank Meyer, Stefan Schütz. The company was founded in 2017.

E.On Energia SpA engages in the sale and supply of energy and natural gas. It offers condensing boilers, air conditioning systems, and air pumps. Its products include E.ON LuceVerde Più, E.ON LuceVerde Bioraria, E.ON RisparmioCerto Luce, E.On RsparmioCerto Gas, E.ON RisparmioGas, and E.ON GasVerde Più. The company is headquartered in Milan, Italy.

Krefelder Baugesellschaft mit beschränkter Haftung is a dry wall contractor and construction company based in Krefeld, Germany. The German company operates as a dry wall contractor and constructs buildings. The company is ultimately controlled by the City of Krefeld. The CEO of the company is Thomas Siegert.

SWK Mobil GmbH is a company based in Krefeld, Germany that provides sustainable offers for Krefeld. The German company is a TÜV-certified service provider that offers Strom, Gas, and other products. The company is also active in the areas of mobility, heat, and water in and around Niederrhein. The company is ultimately controlled by the City of Krefeld. The CEOs of the company are Carsten Liedtke, Guido Stilling.

SWK Energie GmbH engages in the operation of plants and facilities for the supply of electricity, natural gas, heating, and water. It also provides telecommunications services. In addition, the firm conducts trading activities related to energy supply. The company was founded on December 20, 2000 and is headquartered in Krefeld, Germany.