DB ProjektBau GmbH was a German company that carried out and supported large-scale railway projects for Germany's national rail carrier, Deutsche Bahn (DB). It was created on 1 January 2003 as a subsidiary of the DB.

In 2016, it was merged with DB international into DB Engineering & Consulting GmbH.

v t e Deutsche Bahn
Divisions	Arriva DB Netze DB Schenker
European subsidiaries	Arriva DB Cargo DB Cargo France DB Fernverkehr DB Netz DB Regio DB Station&Service
Australia	Canberra Metro
Poland	DB Cargo Polska
United Arab Emirates	Etihad Rail DB (49%)
United Kingdom	Bus Arriva Buses Wales Arriva Herts & Essex Arriva London Arriva Midlands Arriva North East Arriva North West Arriva Southern Counties Arriva Yorkshire Rail Alliance Rail Holdings Arriva Rail London Arriva TrainCare Chiltern Railways CrossCountry DB Cargo UK Grand Central
United States	California High-Speed Rail
Former subsidiaries	Arriva Deutschland Arriva Malta Arriva PCC (50%) Arriva Rail North Arriva Scotland West Arriva Trains Wales CityNightLine DB ProjektBau DB Reise & Touristik London Overground Rail Operations (50%) The Original Tour Tyne & Wear Metro Wardle Transport Wrexham & Shropshire Yorkshire Tiger
Services	Arriva Max Arriva Sapphire EuroCity Intercity Express Intercity Interregio-Express Regional-Express Regionalbahn S-Bahn
Former services	DB AutoZug City Night Line InterRegio Metropolitan
History	Deutsche Reichsbahn Deutsche Bundesbahn Deutsche Reichsbahn (East Germany)
Related topics	BahnCard Bahntower Bahn TV Call a Bike Rail transport in Germany
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