Christian Joisten

Gas-, Elektrizitaets- und Wasserwerke Köln AG supplies power and gas. The company is headquartered in Cologne, Germany.

Sparkasse KölnBonn provides banking services to private and corporate clients. Its products include online banking and payment system; current and savings accounts; credit cards; deposits and investments; loan and financing, building and home financing; securities and brokerage; retirement plan and insurances; international banking; liquidation management; as well as corporate formation and succession. The company was founded in 1826 and is headquartered in Cologne, Germany.