Networks that bring us closer

Bringing territories closer together and connecting them

Dorsalys is Eiffage Énergie Systèmes' brand dedicated to transport infrastructures and network operators.

The Dorsalys brand federates all electrical and climate engineering business lines to bring you turnkey solutions, with the guarantee of system consistency, a commitment to performance, the preparation of operation and the maintenance of your installations.

We bring together all our talents and cutting-edge technologies to connect people and territories, by transporting and distributing energy to make it accessible to as many people as possible, by developing communication networks for ever smoother exchanges, by ensuring the reliability of your data centres to guarantee data security and by improving the quality and safety of transport infrastructures to reduce distances.


Dorsalys means recognised expertise

  • All the skills of the Eiffage group at your service to carry out the design, construction and turnkey or made-to-measure maintenance of all your projects.

  • Nearly 28,000 committed expert employees at the service of your projects.

  • A strong local presence in territories through our 500 establishments. Our organisation, which meets your needs as closely as possible, enables us to combine the strength of our local presence and the expertise of our dedicated speciality centres.

Rail and urban transport infrastructures

public or private rail and urban transport

Dorsalys solutions and services are aimed at public or private rail and urban transport players, high-speed and regional line operators, and high service level tramway, metro and bus line operators.


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Road transport infrastructures

road transport players

Our solutions and services are intended for all road transport players: motorway concession companies, operators/managers of dual carriageways, road tunnels and large toll bridges, public transportation organisations and all other companies specialised in the road sector.


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Telecom network solutions


Dorsalys teams provide telecom operators, equipment manufacturers and local authorities with a complete, made-to-measure range of network and telecommunication solutions and services to design, deploy, operate and maintain your telecom networks and equipment.


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Data hosting - Data centre

Data center

Whether you are a hosting provider, a telecommunication operator or a company, Dorsalys experts are there to support you in the construction and securing of your data centres through a turnkey or made-to-measure approach to the design of technical, installation construction and maintenance solutions.


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Energy transmission and distribution

HVB - overhead power lines

From design to operation, Dorsalys develops a multi-technical turnkey offering covering installation and renovation of HVB substations, which are essential elements in the transmission and distribution of electricity.

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Dorsalys combines its expertise, its local presence and its field knowledge to offer turnkey installation of overhead power lines of all voltages not only across France but also in Europe, including Germany and Belgium.

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