DB Engineering & Consulting (DB E&C) is an international engineering and consulting company of Deutsche Bahn that specialises in consulting, planning, and implementation services for infrastructure and mobility projects in Germany and worldwide. DB Engineering & Consulting was created in Germany at the beginning of April 2016 as a result of the merger of two DB subsidiaries, DB International and DB ProjektBau.

DB Engineering & Consulting (DB E&C) originated from the establishment of Deutsche Eisenbahn-Consulting in 1966. Originally an independent entity, it became fully owned by Deutsche Bahn in 2002.

In 2003, Deutsche Eisenbahn-Consulting became a 100% subsidiary of DB ProjektBau, a newly formed DB company.

By 2007–2008, Deutsche Eisenbahn-Consulting underwent rebranding as DB International. Operating independently within the DB Group, DB International focused on client business in domestic and international markets, while DB ProjektBau concentrated on domestic projects.

In 2016, DB ProjektBau and DB International merged, forming DB Engineering & Consulting. In the same year, DB E&C expanded its services by acquiring DB Umweltservice (formerly Bahn-Umwelt-Zentrum), expanding its range of services to include environmental analyses.

In 2017, DB E&C established the DB Rail Academy product division and started offering international vocational training and professional development for the transport sector.

The following year, DB Engineering & Consulting acquired infraView. DB Engineering & Consulting, DB International Operations, and infraView were merged under the DB E.C.O. Group in 2019.

In 2020–2021, DB Engineering & Consulting acquired engineering and software developer ESE GmbH and acquired shares in inno2grid.