Steffen Müller

DB Bahnbau Gruppe GmbH is a German company that specializes in railway construction and maintenance services. The company is based in Berlin, Germany. The company is a subsidiary of Deutsche Bahn AG, which is ultimately controlled by the Government of Germany. The CEOs of the company are Markus Egerer, Karl Markus Faller, Thomas Hermann.

DB Regio AG provides commuter train services. The firm specializes in the development and operation of short- and medium-distance commuter train units in urban centers. It engages in passenger transport operations, with focus on regional transportation network connections within metropolitan areas. Its focus areas also encompass investments and contract management, pricing and revenue marketing, and information technology integration. The company is headquartered in Frankfurt, Germany.