Les filiales

EGENIE, a family company created in 2002 and a subsidiary of TSO since 2014, primarily engages in the construction, maintenance and upkeep of railway tracks, as well as operations on terminal installations.
EGENIE carries out interventions tailored to your needs in three French regions: Nouvelle-Aquitaine, Occitanie and Provence-Alpes Côte d’Azur.

Specializing in the installation and maintenance of railways in France, mainly in the Paris region.

Since 2012, FVF, a subsidiary of TSO, has been deploying all its expertise and working to secure regeneration, maintenance and new line construction sites.
With over 200 employees and a constantly evolving workforce, our teams are present throughout the territory to ensure safety service missions.

Specialized in survey, design and quantity surveys, in software development and survey oriented training.

OFFROY, a family company founded in 1947 and a subsidiary of TSO since 2012, primarily engages in the construction, maintenance and upkeep of railway tracks, as well as civil engineering associated with the tracks and operations on terminal installations.
OFFROY operates close to your needs in 4 French regions: Ile-de-France, Grand Est, Hauts-de-France and Bourgogne-Franche-Comté.

OLICHON, a family company established in 1965 and a subsidiary of TSO since 2011, primarily engages in the construction, maintenance and upkeep of railway tracks, as well as operations on terminal installations and civil engineering works related to the railway environment.
OLICHON operates close to your needs in three French regions: Brittany, Centre-Val de Loire and Pays de la Loire.

Expert and specially in railway safety.

Since 2011, SAGES RAIL, a subsidiary of TSO since 2014, has been deploying all its expertise to secure regeneration, maintenance, and new line construction sites.
With over 300 employees, our teams are present throughout the country to ensure safety services.

SIFEL, a company established in 1982 and a subsidiary of TSO since 2007, carries out the overhaul, maintenance, and reconstruction of railway equipment.
With decades of experience and nationally recognised expertise, SIFEL is committed to maintaining equipment to ensure the proper functioning and safety of railway sites.

TSO CATENAIRES, a subsidiary of TSO, designs, installs, and maintains power supply and electrification systems essential for our railway networks.
With decades of experience and nationally and internationally recognised expertise, TSO CATENAIRES is committed to offering tailored solutions for your most ambitious projects.

TSO SIGNALISATION, a subsidiary of TSO created in 2018, designs, installs, and maintains signalling and telecom systems in railway infrastructures.
With several years of experience and nationally recognised expertise, TSO SIGNALISATION is committed to offering tailored solutions for your most ambitious projects.