Bruno Kierdorf

SWK Stadtwerke Krefeld AG operates as a holding company, which engages in the distribution and supply of electricity, water, gas, and heat. The firm also provides waste disposal and transportation services. It operates through the following segments: Energy, Water, Waste Management, Transportation, and Services. The Energy segment comprises electricity, gas, and heat. The Water segment deals with water and sanitation. The Waste Management segment specializes in waste collection. The Transportation segment offers public transport with buses and trams. The Services segment consists of management, control, and infrastructure. The company was founded in 1990 and is headquartered in Krefeld, Germany.

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.