Ullrich Sierau

Dortmunder Stadtwerke AG provides urban development and transportation services for the city of Dortmund. The firm, through its subsidiaries, also provides energy and telecommunication services. The company was founded on June 18, 1857 and is headquartered in Dortmund, Germany.

EMSCHERGENOSSENSCHAFT provides water treatment and management support services. The firm specializes in the development and operations of wastewater treatment plants, pump stations, waterways, and closed sewer systems. Its focus areas encompass wastewater purification, proper drainage, floodwater protection, and waterway management. It operates as a water management association through funding by its members, cities, businesses, and the mining industry. The association was founded on December 14, 1899 and is headquartered in Essen, Germany.

KEB Holding AG is a German company that provides securities brokerage services. It is based in Muenster, Germany and ultimately controlled by the City of Dortmund. The company was founded in 2002.

Klinikum Dortmund gGmbH is a medical center located in Dortmund, DE. The center is an academic teaching hospital of the University of Münster, and it has two clinic centers, Mitte and North, located in Beurhausstraße 40 and Münsterstraße 240, respectively. The center has 25 clinics and five institutes that offer top medicine in all specialties except psychiatry and transplant medicine. The company provides high-quality medical services to patients in Germany. The private company was founded in 1876, and the CEO is Rudolf Mintrop.

Sparkasse Dortmund provides commercial banking services. The bank offers telephone and online banking, brokerage, personal and home loans, real estate lending, and depositary services. It provides services through a chain of 130 branches. Sparkasse Dortmund was founded on January 14, 1841 and is headquartered in Dortmund, Germany.