Assystem, one of the world's leading independent nuclear engineering companies, is committed to accelerating the energy transition. We see ourselves as an activist in the development of nuclear energy, convinced that it is an essential part of the fight against climate change.
8,000 switchers, spread in 13 countries in Europe, Asia, Africa and the Middle East are working every day to make the energy switch by accelerating the development of nuclear and renewable energies, power grids, clean hydrogen projects and low-carbon transport.
We design and supervise major projects through our engineering activities and accelerate our customers' digital transformation. We also develop new solutions to build faster and improve the performance of complex infrastructures.
59 years of experience have made Assystem a key partner of the world's largest industrial groups: CEA, EDF, ENEC, Enedis, Engie, Framatome, ITER, K.A. CARE, Naval Group, NICDC, Orano, RATP, Rolls Royce, Royal Commission, Sellafield, SNCF...
Assystem is ranked in the Top 3 companies in the nuclear energy sector.
SYSTRA is one of the world's leading engineering and consultancy groups specialising in public transport and mobility solutions. For more than 65 years, the Group has been committed to helping cities and regions to contribute to their development by creating, improving and modernising their transport infrastructure.
With its 11,000 employees, the Group's mission is to connect people and bring territories closer together in the 80 countries where it operates. By making travel more fluid, the infrastructures designed by SYSTRA bring communities together, develop social integration and facilitate access to employment, education and leisure.
A signature for transport solutions, SYSTRA supports its partners and clients throughout the lifecycle of their projects. SYSTRA is involved at a very early stage in the design phase, right through to the deployment and maintenance test phases. SYSTRA provides all of its services in more than 80 countries worldwide and generates 80% of its turnover internationally.
KEY FIGURES
- €1.3 bn in sales in 2024
- 2nd international engineering company for Mass Transit & Rail*
- 3d for Bridges*
- 6th in the Transport sector*
* Engineering News-Record (ENR) ranking, 2025
En première ligne de la transformation numérique des entreprises et des territoires, le Groupe Sogetrel est spécialisé dans les services aux infrastructures numériques et équipements connectés. Il contribue à la qualité de vie des citoyens, à la performance des entreprises et à la durabilité des territoires au travers de 3 grandes missions :
➔ CONNECTER : construction de réseaux de communication fixes et mobiles.
➔ INTÉGRER : intégration de solutions connectées (smart city, smart building, bornes interactives, vidéoprotection, IoT…).
➔ EXPLOITER : services d’installation, de support et de maintenance des réseaux et des solutions numériques des entreprises (interventions sur site, help desk, infogérance …).