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SII Group

SII is an international group specialising in digital services and information and communication technologies (ICT). Founded in 1979, SII operates as a digital consulting and engineering company, providing long-term support to major groups in demanding sectors such as aeronautics, space and defence, banking and insurance, telecommunications, energy, and industry. With a presence in 21 countries and more than 16,000 employees, the group places human values and team commitment at the heart of its strategy.

  • About us
  • SII in the world
    • SII in France
    • Aix Méditerranée
    • Atlantique
    • Auvergne Rhône-Alpes
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Industries

A key player in digital transformation, SII designs and integrates technological solutions, combining specific developments with proven technologies. From industry to finance, telecommunications, and services, the group supports its clients in the success of their most complex projects, both in France and internationally.

  • Aeronautic, Space and Defense
  • Banking and Insurance
  • Telecoms
  • Automotive and Transport
  • Energy
  • Health
  • Retail and Distribution

Expertise

SII leverages its engineering and IT expertise to support, accelerate, and facilitate its clients' transformations. Our tailor-made solutions combine technical mastery, industry knowledge, and a pragmatic approach.

  • Applications
  • Cybersecurity
  • Data and AI
  • Embedded Systems
  • Infrastructure and Cloud
  • Manufacturing Engineering
  • Mechanical and Electrical Engineering
  • System Engineering
  • Test and Automatisation
  • Test and Simulation

Innovation

SII is involved in research and innovation activities, either independently or through partnerships, in order to support our clients and society in responding to major challenges: connected, inclusive, and sustainable territories and services, as well as eco-friendly, autonomous, and accessible transportation.

  • Optimize product operations within its ecosystem
  • Reducing time-to-market while ensuring reliability
  • Supporting the energy transition
  • Improvement of production and operation

CSR approach

At SII, we firmly believe that digital technology is a driver of opportunities and sustainable solutions. It enables us to support society and our clients in their transition towards a more resilient future, while strengthening our social commitment through equity, diversity, and inclusion, which are essential pillars in addressing social, climate, and environmental challenges.

  • SII Corporate Foundation
  • Diversity, Equity and Inclusion Mission

Join us

Joining SII means engaging in a collective adventure: at SII, we dare, we innovate, and we commit ourselves to working together to build a sustainable, inclusive, and technological future.

  • Why join SII?
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News

Follow the latest news from the SII Group. Discover our projects, our expertise, our commitments, and the life of our agencies in France and internationally.

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SII France ranked among the Best Workplaces for the ninth consecutive year
Corporate
12 mar. 2026
SII France ranked among the Best Workplaces for the ninth consecutive year

SII France ranked among the Best Workplaces for the ninth consecutive year

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Actu_SII-Concatel-changes-its-brand-to-SII-Group-Spain.jpg
Corporate
16 mar. 2023
SII Concatel changes its brand to SII Group Spain

SII Concatel, our subsidiary in Spain, announced today its rebranding to SII Group Spain as part of our shared global growth and business development strategy.

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