Hans-Jochem Witzke

Holding der Landeshauptstadt Düsseldorf GmbH is a German company that provides services related to heating, hydraulics optimization, lighting management, and cost-saving solutions for businesses. The company is based in Dusseldorf, Germany. The CEOs of the company are Burkhard Hintzsche and Christian van Beeck. It was founded in 2002 and is ultimately controlled by the City of Düsseldorf.

Dusseldorf Congress GmbH is a company based in Dusseldorf, DE and is part of Messe Dusseldorf GmbH. Dusseldorf is known for being one of the top ten most livable cities in the world and an important hub for international business. The German company provides a variety of individually usable spaces in the CCD Congress Center and exhibition halls on the exhibition grounds. The company's services include hosting congresses, conferences, company presentations, and other events with up to 100,000 visitors. The CEO of the company is Maria Kofidou.

Stadtsparkasse Düsseldorf provides banking and financial services. It offers services such as current account, credit cards, Internet banking, and electronic cash to the business clients. It provides services for private clients include savings deposits, overdraft facilities, installment loans, and housing finance. The company was founded in 1825 and is headquartered in Düsseldorf, Germany.

Wohnungsbaugenossenschaft Erkrath eG is a private company that provides emergency services such as locksmiths, plumbing, and heating installation. The company is based in Erkrath, Germany. The German company also offers answers to frequently asked questions about cooperative housing. The company was founded in 1953, and the CEO is Christian Frank.