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Opening up and
connecting communities

Breaking down barriers

We provide a comprehensive range of services providing access to road and rail transportation. Our teams have regularly demonstrated their ability to overcome technical challenges and successfully complete highly complex, iconic projects such as intercity rail links (including the recent Bretagne–Pays de la Loire high-speed line). We have gained extensive experience in the area of energy infrastructures, particularly high-voltage lines and transformer stations. We harness our energy transmission, EHV power line interconnection and network extension expertise to expand access to energy. We are helping to usher in the connected world and related new applications, and can support your telecom network design, deployment and maintenance projects.


Dorsalys is the Eiffage Énergie Systèmes brand devoted to the infrastructures and networks market. Dedicated Dorsalys experts coordinate the Division specialist know-how relating to transport infrastructures and network operators.