Mechanical Engineer for the ATLAS Detector

What you'll do

During Long Shutdown 3 (LS3, 2026-2030), the ATLAS detector will be upgraded with new detector systems, requiring detailed engineering work to finalise their design, integration, installation sequence, and connection to services. This will involve substantial on-site activities. As a mechanical engineer, you will join the TC engineering team and serve as the interface between ATLAS Technical Coordination (TC) and the detector upgrade teams, particularly for critical mechanical integration activities.

Your responsibilities

Oversee the design of all mechanical aspects of a detector system, in collaboration with the worldwide institutes contributing to the production of deliverables.
Define and manage the mechanical interfaces between the ATLAS detector and its infrastructure, including supports and services. Supervise the production of 3D integration models and ensure that the relevant envelopes are properly taken into account.
Develop the transport and underground installation sequence, and design the associated installation tooling and its interfaces with the detectors.
Support the detector team in coordinating the production of mechanical components to help ensure their timely delivery and facilitate smooth assembly planning.
Participate in the assembly of the detectors inside the clean room.
Supervise the installation of service infrastructure, including cable trays and flexible chains, in the ATLAS detector environment and ensuring it is implemented in line with the detector commissioning needs.
Supervise the installation of the detectors inside the Experimental Cavern.

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Your profile

Solid experience in mechanical design, from 3D modelling to manufacturing drawings.
Proven expertise in installation of high-technology equipment, requiring accurate procedures and tooling.
Proven practice in mechanical calculations and Finite Element Analysis.
Demonstrated experience in writing installation procedures.
Experience in project management, including planning, procurement, and reporting to project management hierarchy.
Experience in coordination of designers and technicians.
Experience in performing a variety of engineering tasks, managing multiple projects in parallel, and working effectively within international and multidisciplinary teams would be an advantage.
Master's degree or PhD or equivalent relevant experience in the field of Mechanical Engineering or a related field.

Your skills

Integration of mechanical systems.
Knowledge of design codes and compliance verification of mechanical equipment.
Assembly and integration of infrastructure for detectors or experimental facilities.
Knowledge and application of numerical modelling in solid mechanics.
Assembly of mechanical structures and equipment.
Delivers high quality work on time and fulfils expectations.
Is willing to work on different projects simultaneously.
Identifies, defines and assesses problems, takes action to address them.
Gains trust and collaboration from others.
Takes initiative beyond regular tasks and makes things happen.
Spoken and written English, with a commitment to learn French.

Ideal start date: 01/09/2026

Contract duration (in months): 48

Grade range: 6

Benchmark job: 200090 - Mechanical Engineer

Job flexibility: Fully Onsite

Team supervision

Medical hazard

Exposure to risk of falling from heights during scaffolding assembly and dismantling operations.

Given the occupational health risks associated with this position, the selected candidate must obtain medical clearance before a contract offer is confirmed.

Employment conditions

Work during nights, Sundays and official holidays, when required by the needs of the Organization.
Interventions in underground installations.
Work in Radiation Areas.

Global Benefits at CERN

A minimum net entry-salary of 9236 Swiss Francs per month, 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. Currently, we cannot consider applications from Pakistani and Lithuanian nationals for positions with a 2026 start date, as the ceiling defined under Article II.5 of the Associate Membership Agreement has been reached.
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 in close collaboration with and supporting the wider scientific community working at CERN. This includes designing and operating experiments, developing and constructing detectors, acquiring and analysing physics data.

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.