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Salary
≈ $35k – $64k per year (Estimated)
Location
In office (Lyon)
Seniority
Senior
Employment
Full-Time

Confirmed on the employer's own hiring board on Nov 2, 2026. First seen by Alion on Oct 12, 2026. ALTEN scores B on the Alion truth index.

Overview
Company
Impact
Profile match
ALTEN is a French engineering and technology consultancy founded in 1988 that supplies project engineers to companies developing complex products and systems. Its consultants work inside client organisations across automotive, aerospace, defence, rail, energy, telecommunications, life sciences and finance, covering embedded software, mechanical and electrical design, simulation, testing, certification and information systems. Listed on Euronext Paris and headquartered in Boulogne-Billancourt, the group employs tens of thousands of engineers across more than thirty countries and has grown through a long sequence of acquisitions of specialist engineering firms.

As a leader in Engineering and IT Services, ALTEN comprises nearly 60,000 employees, 88% of whom are engineers. Operating in more than 30 countries, the Group supports its clients' development strategies in the fields of innovation, R&D, and technological information systems.

ALTEN is involved in major projects, including :

  • Maintenance and modernization of the operational nuclear fleet
  • Spare parts supply and stock management for the French nuclear fleet
  • Support for nuclear submarine program management
  • Design of wind turbines
  • Digitalization of maintenance for installations

As an HVAC Engineer, you will be responsible for the design, installation, and maintenance of heating, ventilation, and air conditioning systems for projects in the nuclear sector. Your responsibilities will include:

  • Needs Assessment: Analyze input data and evaluate requirements for thermal comfort and air quality.
  • Thermal and Airflow Studies: Conduct thermal and airflow analyses and size ventilation systems.
  • Technical Documentation: Prepare technical reports and contribute to layout planning.
  • Installation Supervision: Oversee the installation of systems on-site and participate in commissioning tests.

Profile

  • You hold a degree from an engineering school or a Master’s degree (Bac +5) and have prior experience in a similar role, ideally in an agile environment. You demonstrate a strong interest in the technical aspects of this field.

Key Skills

Proficiency in professional English and French

  • A solid understanding of nuclear safety culture, adopting its principles and methods daily
  • Knowledge of the fuel cycle and the functioning of PWRs (Pressurized Water Reactors), including associated risks and challenges
  • Familiarity with the nuclear environment and best practices for safety-critical activities (installations, systems, equipment, operations, etc.)

If this describes you, don’t wait-APPLY and join the ALTEN adventure!

ALTEN offers a dynamic engineering culture and passion for technology, high-value-added projects, mobility opportunities, and personalized career development within an innovative and stimulating environment:

  • Growth opportunities: ALTEN boots your career, enabling rapid growth aligned with your aspirations. With dedicated support, access to training, and certification opportunities, you can enhance your expertise and progress across our four career paths: Specialists, Project Management, Business Management, and Support Functions.
  • Sustainable Innovation: Participate in technological innovation projects within a creative, innovative, and solution-driven environment. ALTEN sees sustainability challenges as opportunities to drive research and innovation. With 31% of our internal R&D focused on sustainable innovation, we aim to turn challenges into value-creating solutions that propel progress.
  • Environmental Responsibility: ALTEN is committed to minimizing its environmental impact while promoting sustainable growth. Our objective is to achieve net-zero emissions by 2050, a goal that guides our operations and strategic initiatives.
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