Mechanical Engineer – Design and Construction of Particle Detectors

What you'll do

You will join us as a Mechanical Engineer within the ATLAS Detector Team, contributing to the development and construction of the next generation of particle detectors. Working in the Tracker Section (EP-ADE-TK) and in close collaboration with the Detector Technologies Group (EP-DT), you will take part in the design, prototyping, assembly and testing of the ATLAS ITk Pixel Outer Barrel support structures and tooling. Your work will be hands-on and technically challenging, involving precision engineering and integration activities for one of the most advanced components of the future ATLAS Inner Tracker.

Your responsibilities

Participate in the conception and detailed design of detector components, tooling and quality control infrastructure for the construction of the ITk Pixel Outer Barrel.
Verify the design of components and tooling according to the relevant standards and best engineering practices, performing both analytical and numerical calculations.
Develop, document, and implement tools and procedures for the assembly, installation, testing, and repair of detector components, sub-assemblies and services.
Participate hands-on in the detector integration work in Building 154 and the ATLAS SR1 cleanroom, supporting the assembly, testing and installation activities.
Prepare technical specifications for detector components and tools, following up their production, acceptance and installation.

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Your profile

Proven experience in the design of precision mechanical components and assembly tools for complex systems. Previous work experience with particle detectors would be considered advantageous.
Demonstrated experience in the use of CAD software for 3D modelling and management of large assemblies. Proficiency in Catia V5 would be a plus.
Demonstrated experience in the production of 2D technical drawings according to the relevant standards for dimensioning and tolerances (e.g. ISO Geometrical Product Specifications, GPS).
Proven hands-on experience in the construction and testing of mechanical systems. Experience in the assembly of sensitive equipment in a clean room environment would be considered advantageous.
Demonstrated experience in the use of analytical methods and commercial FEA software (e.g. Ansys) for the analysis of structural and dynamic problems.
Master's degree or equivalent relevant experience in the field of mechanical or aerospace engineering or a related field.
Structural joining techniques, particularly orbital welding and adhesive bonding is an asset.
Experience in dimensional metrology, including the operation of coordinate measuring equipment and laser scanning systems is an asset.

Your skills

Design and analysis of mechanical structures.
Production of 2D drawings and 3D models: (proficiency in Catia V5, ISO dimensioning, tolerancing).
Integration of mechanical systems.
Knowledge and application of numerical modelling in solid mechanics: (finite element analysis).
Knowledge and application of joining techniques: glueing: and welding.
Delivering high quality work on time and fulfilling expectations; adapting quickly and resourcefully to shifting priorities and requirements.
Working well in groups and readily fitting into a team; participating fully and taking an active role in team activities; working well autonomously; taking on activities and tasks without prompting.
Addressing complex problems by breaking them down into manageable components.
Spoken and written English, with a commitment to learn French.

Ideal start date: 01/02/2026

Contract duration: 60

Grade range: 6

Benchmark job: 200090 - Mechanical Engineer

Job flexibility: Fully Onsite

Employment conditions

Shift work, when required by the needs of the Organization.
Work in Radiation Areas.
Interventions in underground installations.
A valid driving licence.

Global Benefits at CERN

A minimum entry-salary of 9113 Swiss Francs per month (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.

Let's get you ready

Be sure to meet the eligibility criteria

You are a national of a CERN Member State or Associate Member State.
You have relevant qualifications and professional experience.
If you have previously held a Staff contract at CERN, you will not be eligible for these positions.
Please pay attention to the additional criteria and requirements for this specific position and mentioned above.

You will need these documents to complete your application

Your CV (English or French)
Any document you consider relevant to your application

Your CERNDepartment

The EP department conducts research in experimental particle physics and serves as a key reference center for the European physics community, contributing to the education and training of young scientists.

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!

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Still have a doubt ? Here are the most frequently asked questions

What should I expect during my first week at CERN?

Your onboarding at CERN includes a comprehensive induction programme, which starts with an official welcome session at the beginning of each month. In addition, you will receive important information both before and after your arrival to ensure a smooth transition into your new role. This process is designed to help you get acquainted with CERN’s environment, your team, and the tools and systems you’ll be using.
How big would the team be?

The size of the team you'll be working with at CERN depends on the specific role and department. Some teams are small and highly specialized, while others are larger and more interdisciplinary. During the interview process, you'll have the opportunity to learn more about the team structure for the position you are applying for.
What is the working language at CERN?

The working languages at CERN are English and French. However, it is not always mandatory to speak both languages to work at CERN. We offer language training to help you acquiring the other language.
What support does CERN provide for relocation?

CERN does not offer direct assistance with relocation. However, depending on your role and specific criteria, you may be eligible for certain benefits such as an installation allowance and coverage of travel expenses to join CERN. These benefits are designed to help ease the transition when relocating to the Geneva area. For more information, please consult the “Salary, Benefits and Support“ page.
Do I need a visa to work at CERN?

Whether you need a visa to work at CERN depends on your nationality and the duration of your stay. CERN assists with the necessary visa and work permit processes for its employees and visitors. The specific requirements will be communicated to you during the recruitment process.
What would my salary be?

Salaries at CERN are determined by a structured scale. Salaries are based on your role, qualifications, and experience, and are not subject to negotiation. Specific details will be provided as your application progresses. For more information, please refer to the dedicated page.