SII S.A. operates as a provider of digital services and technology consulting. The company delivers software development, automated testing, verification, validation, and automation services, along with project management solutions that include multi-site coordination, standard KPIs, and visual management tools. It develops products such as the ""I Can SII"" vibrating vest, which integrates lidar, camera, and data fusion technologies to support the mobility and safety of blind and visually impaired individuals. The company provides security services for physical premises, application infrastructure, and production environments, including penetration testing. Additional offerings include eco-design, research and development, decarbonization, and responsible digital initiatives. The company serves clients in the aeronautics, space, defense, and industrial technology sectors, as well as organizations engaged in business transformation and digital projects. The company was founded in 1979 and is based in Paris, France.