Machine Learning Engineer

What you'll do

You will design, integrate, and operate advanced machine learning capabilities within CERN’s machine learning platform, enabling scalable, secure, and reusable ML services for scientific and IT workloads. Working closely with experiments and service teams to onboard their ML use cases in a reliable, performant and sustainable manner, you will build CERN’s next-generation LLM and AI agent platform, tuning models into secure, scalable services for scientific and operational use cases. You will be responsible for the design and integration of the selected tools after extensive due diligence and validation against CERN use cases in all departments.

Your responsibilities

Develop and operate the machine learning service of CERN IT, covering model training, hyper-parameter optimisation and serving, targeting optimal usage of accelerator resources.
Integrate and operate LLM and AI agent capabilities within the CERN machine learning service, including scalable model serving, agent frameworks, and secure multi-tenant access.
Extend existing MLOps workflows to cover deployment, observability and lifecycle management of models, agents and RAG pipelines targeting CERN and external data sources.
Produce and present reference architectures, documentation and best practices to support CERN users and use cases.
Ensure efficient collaboration with other groups in IT and in other departments, as well as constant alignment with the evolving landscape of external research and industry organisations.

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Your profile

Strong background in machine learning systems with hands-on experience deployment and operating such services in production environments.
Solid MLOps and cloud native skills, including Kubernetes and containerisation, CI/CD, observability and model lifecycle management.
Proficiency with GPU and/or other accelerator platforms, including performance tuning and optimisation of inference workloads.
Familiarity with open source ecosystems and willingness to contribute, evaluate upstream projects and follow community best practices.
Master's degree or equivalent relevant experience in the field of Computing Engineering or a related field.

Your skills

Knowledge of operating systems.
Knowledge of system configuration tools.
Architecture and design of ICT systems.
Identification and selection of relevant emerging ICT technologies.
Knowledge and application of software life-cycle tools and procedures.
Works well in groups and readily fits into a team; participates fully and takes an active role in team activities.
Addresses complex problems by breaking them down into manageable components.
Takes initiative beyond regular tasks and makes things happen.
Shows appreciation for the ideas and contributions of others and encourages others to express their views, even if controversial.
Spoken and written English, with a commitment to learn French.

Ideal start date: 01/07/2026

Contract duration (in months): 60

Grade range: 6

Benchmark job: 200020 - Computing Engineer

Job flexibility: Hybrid

Employment conditions

Stand-by duty, and work during nights, Sundays and official holidays, when required by the needs of the Organisation.

Global Benefits at CERN

A minimum entry-salary of 9236 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. 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 IT Department designs, operates, and evolves CERN’s core computing and digital infrastructure. It provides the large-scale data processing, storage, networking, and collaboration services that enable CERN’s scientific programme. The Department supports the LHC and non-LHC experiments, accelerator systems, and the wider CERN community, while advancing new computing technologies through research, development, and strategic partnerships.

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.