ALTEN SA is a French multinational engineering and technology consulting company, founded in 1988 and headquartered in Boulogne-Billancourt, France. Listed on the Paris Stock Exchange since 1999, it operates in over 30 countries with approximately 57,400 employees, including 51,000 engineers.
The ALTEN Group specializes in outsourced engineering, R&D, and IT services, supporting clients across sectors such as aeronautics, space, defense, automotive, energy, life sciences, and industrial equipment. Its offerings include mechanical and materials engineering, systems engineering, project management, quality assurance, embedded software, artificial intelligence, cybersecurity, and cloud infrastructure.
In 2025, ALTEN reported revenue of €4.10 billion. The company has participated in chemical industry-related projects, including collaborations on advanced composites and recyclable materials, such as the Zephir Project with partners like Arkema.
Also known as ALTEN Group.
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