Indoor Air Quality Engineer (HSE-OHS-DR-2026-37-LD)

At CERN, the European Organization for Nuclear Research, physicists and engineers are probing the fundamental structure of the universe. Using the world's largest and most complex scientific instruments, they study the basic constituents of matter - fundamental particles that are made to collide together at close to the speed of light. The process gives physicists clues about how particles interact, and provides insights into the fundamental laws of nature.

Introduction:

You will provide support to the Organisation in matters of Indoor Air Quality (IAQ) for occupational Health & Safety. This includes requirements for the design of air management systems, performing on-site workplace assessments and leading air quality studies for specific projects.

Functions:

• Provide technical and safety requirements for the design and retrofit of ventilation and filtration systems.
• Conduct on-site workplace air quality assessments, measuring different indoor pollutants, analysing the results and proposing solutions.
• Investigate incidents related to air quality, perform root cause analysis, and recommend corrective actions.
• Lead complex Indoor Air Quality (IAQ) studies for high-risk and/or high-complexity projects.
• Perform ventilation / filtration rate calculations and airflow modelling.
• Develop IAQ guidelines, procedures, best practices and other engineering solutions for the Organisation.
• Act as Safety correspondent and become the single point of contact in matters of safety, for some CERN-specific projects.

Master's degree or PhD or equivalent relevant experience in the field of Mechanical Engineering or Environment and Building Engineering or a related field.

Experience:

• Strong background in nuclear ventilation and ISO 17873 standard.
• Strong background on modelling the spread of pollutants in indoor environments.
• Experience with IAQ sensors and performing on-site measurements is desirable.
• Profound knowledge in Indoor Air Quality (IAQ) and Ventilation Standards.
• Knowledge in designing HVAC or air management systems for tertiary and industrial facilities.
• Familiarity with Python programming language and CFD tools is desirable.

Technical competencies:

• HVAC process design and analysis.
• Occupational safety and risk management.
• Knowledge and application of numerical modelling in fluid mechanics and/or heat transfer.

Behavioural competencies:

• Working in Teams: building and maintaining constructive and effective work relationships.
• Communicating Effectively: demonstrating a pro-active approach to resolving differences; addressing issues of conflict constructively.
• Managing Self: demonstrating a receptive approach to feedback; being open to criticism and reconsidering position accordingly.
• Solving Problems: seeking and integrating other points of view when tackling an issue; consulting experts in the field and undertaking benchmarking.

Language skills:

Spoken and written English, with a commitment to learn French.

Eligibility and closing date:

Diversity has been an integral part of CERN's mission since its foundation and is an established value of the Organization. Employing a diverse workforce is central to our success. We welcome applications from all Member States and Associate Member States.

This vacancy will be filled as soon as possible, and applications should normally reach us no later than 09.03.2026 at 23:59 CET.

Employment Conditions:

Contract type: Limited duration contract (5 years). Subject to certain conditions, holders of limited-duration contracts may apply for an indefinite position.

Working Hours: 40 hours per week

Job Flexibility: Fully Onsite

This position involves:

• Work in Radiation Areas.
• Interventions in underground installations.
• A valid driving licence.
• Stand-by duty, when required by the needs of the Organization.

Job grade: 6-7

Job reference: HSE-OHS-DR-2026-37-LD

Field of work: Mechanical Engineering

Benchmark Job Title: Health, Safety and Environment Engineer

Global Benefits

• A competitive salary (tax free), increasing in line with your years of relevant experience.
• 30 days of paid leave per year plus 2 weeks annual closure.
• Coverage by CERN’s comprehensive health insurance scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund.
• Family, child and infant monthly allowances depending on your individual circumstances.
• A relocation package (installation grant, removal, travel expenses) depending on your individual circumstances.
• Possibility to extend your contract up to 8 years + eligibility for indefinite contract tenure.

Overview of CERN - Discover a world where the impossible is made possible!

At CERN, the European Organization for Nuclear Research, we are pushing the frontiers of science and technology. Our groundbreaking work brings together not only physicists but also a diverse range of professionals from engineering, technical, scientific, and administrative fields. Together, we foster an environment where innovation and collaboration thrive.

Every day, we face exciting new challenges and opportunities to contribute to cutting-edge research that shapes our understanding of the universe. We meet these challenges through the diverse perspectives within our teams, ensuring every contribution is valued and driving our shared sense of inclusion and purpose. Diversity is a core value of CERN since its foundation, and it remains central to our mission and continued success.

If you are ready to be part of a dynamic, inclusive community pushing the boundaries of knowledge, CERN is the place where your curiosity and skills can thrive. Be part of our mission to uncover what lies at the heart of the universe! TAKE PART!

More information about us, here: careers.cern