{"id":2368684,"url":"https://alion.io/job/alten-hvac-engineer-energy-wm","title":"HVAC Engineer - Energy (W/M)","company":{"id":52934,"name":"ALTEN","domain":"alten.com","url":"https://alion.io/company/alten-com","size_band":"5000+","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":"SmartRecruiters","truth_index":{"grade":"B","score":76,"open_postings":82,"ghost_share":0,"stale_share":0.976,"repost_share":0,"time_to_fill_p50_days":27,"computed_at":"2026-11-02T06:13:15Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":null,"employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Lyon, France"],"countries":["FR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":35000,"max_usd":64000,"period":"year","method":"role_country_seniority_unknown","sample_n":201},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[],"status":"live","first_seen_at":"2026-10-12T14:58:51Z","employer_posted_date":"2026-10-12","last_verified_at":"2026-11-02T20:59:44Z","board_verified":true,"closed_at":null,"days_open":21,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":21},"description":"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.\nALTEN is involved in major projects, including :\nMaintenance and modernization of the operational nuclear fleet \nSpare parts supply and stock management for the French nuclear fleet \nSupport for nuclear submarine program management \nDesign of wind turbines \nDigitalization of maintenance for installations \n 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:\nNeeds Assessment: Analyze input data and evaluate requirements for thermal comfort and air quality. \nThermal and Airflow Studies: Conduct thermal and airflow analyses and size ventilation systems. \nTechnical Documentation: Prepare technical reports and contribute to layout planning. \nInstallation Supervision: Oversee the installation of systems on-site and participate in commissioning tests. \n Profile\nYou 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.\n\nKey Skills\nProficiency in professional English and French\nA solid understanding of nuclear safety culture, adopting its principles and methods daily \nKnowledge of the fuel cycle and the functioning of PWRs (Pressurized Water Reactors), including associated risks and challenges \nFamiliarity with the nuclear environment and best practices for safety-critical activities (installations, systems, equipment, operations, etc.) \nIf this describes you, don’t wait-APPLY and join the ALTEN adventure!\n 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:\nGrowth 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. \nSustainable 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. \n Environmental Responsibility: ALTEN is committed to minimizing its environmental impact while promoting sustainable growth. 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