Photo credit (banner): Matthieu Raffard

Who we are

At SNCF’s Rolling Stock Division, we rely on engineering experts for every aspect of maintenance. Rolling Stock Engineering, in turn, is supported by three entities: the Rolling Stock Engineering Centre (CIM); the French Railway Testing Agency (AEF); and our Rolling Stock Engineering Field Offices (PIM)

Rolling Stock Engineering

Engineering--the heart of everything we do

We count on our engineers to develop specifications for rolling stock, to design and carry out rail testing, and to keep maintenance running smoothly. Rolling Stock Engineering also contributes the innovation and adaptations that create the trains of the future, drawing on the know-how and expertise of 1,700 technicians and engineers.

These specialists are assigned to four units:

  • Rolling Stock Division
  • Centre for Rolling Stock Engineering (CIM)
  • Railway Testing Agency (AEF)
  • Rolling Stock Engineering Field Offices (PIM)

Areas of engineering expertise

Centre for Rolling Stock Engineering (CIM)

CIM is an international standard-setter in rail engineering, offering technical expertise in a number of areas. In particular, it helps shape specifications for the trains of the future and provides input at every stage of the rolling stock lifecycle.

Railway Testing Agency (AEF) 

AEF uses its modern laboratory and facilities to carry out testing in a variety of areas: mechanics, electrics, industrial hygiene, and the environment. It also contributes expertise to outside customers, both in France and abroad.

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Rolling Stock Engineering Field Offices (PIMs)

Our 12 PIMs offer on-the-spot engineering expertise: most are located in Technicentres to provide maximum responsiveness and ensure that SNCF rolling stock delivers safety, reliability and high performance.

In addition to these three centres of excellence, the Rolling Stock Division is supported by two specialized units: our Industrial Logistics Centre (CLI) and Technicampus

Industrial Logistics Centre (CLI) 

CLI ensures that parts are available to the SNCF units that are responsible for maintaining our trains. It anticipates demand for parts, optimizing inventory management and controlling costs. CLI also contributes to our broader drive for operational excellence throughout our supply chain.


Located in a 13,000-sq m building in Le Mans, in North-western France, Technicampus is SNCF’s university of rolling stock. It’s a vital part of the Division, providing technical and cross-functional training programs for SNCF employees and trainees, including work-study participants. Every maintenance specialist in the Rolling Stock Division has been to Technicampus at least once.

Masteris: One-stop access to SNCF’s experience and operating assets

This SNCF subsidiary offers customized rolling stock expertise to a portfolio of 120 customers in France and around Europe. Masteris works with railway companies and other mass transit players, providing support throughout the rolling stock lifecycle: from design to operation to reconditioning.

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