Your responsibilities

As a Junior Mechanical Engineer, you will be joining:

• The Beams department, responsible for the beam generation, acceleration, diagnostics, controls and performance optimization for the LHC and its injector accelerators.
• The Experiments Area Group, which looks after the secondary beamlines, infrastructure, and management of the fixed target CERN experimental areas, provides support to LHC experiments and machine detector interfaces (MDI), offering associated engineering support and specific technical services necessary for all experiments, related projects, and users.

In this position, you will collaborate closely with engineers, designers, and technicians across multiple domains, contributing to fabrication-related decisions, supporting quality assurance activities, and preparing comprehensive technical documentation throughout the project life cycle, in particular:

• Playing an active role in the prototyping activities and design of mechanical systems, performing thermo-mechanical analyses via finite element tools such as ANSYS, together with structural and thermal calculations in compliance with related standards.
• You will be required to use iterative design development to meet both performance objectives and integration constraints.
• Supporting the detailed planning of dismantling and installation operations.
• Writing required procedures and technical design reports.

Your profile

Skills:

• Proven experience with hands-on mock-up or prototyping activities.
• Knowledge of finite element analysis software for thermal and structural simulations (e.g. ANSYS).
• Ability to analyse and interpret simulation and test result data to guide design decisions.
• Experience with 3D CAD software, preferably CATIA.
• Strong problem-solving skills, and ability to work independently and in teams.
• Excellent communication and documentation skills.
• Spoken and written English or French, with a commitment to learn the basics of the other language.

Eligibility criteria:

• You are a national of a CERN Member or Associate Member State.
• By the application deadline, you have a maximum of two years of professional experience since graduation in Mechanical Engineering (or a related field) and your highest educational qualification is either a Bachelor's or Master's degree.
• You have never had a CERN fellow or graduate contract before.
• Applicants without University degree are not eligible.
• Applicants with a PhD are not eligible.

Additional Information

Job closing date: 21.09.2025 at 23:59 CEST.

Contract duration: 24 months, with a possible extension up to 36 months maximum.

Target start date: 01-October-2025

Job reference: BE-EA-EC-2025-139-GRAE

Field of work: Mechanical Engineering

What we offer

• A monthly stipend ranging between 5196 and 5716 Swiss Francs (net of tax).
• Coverage by CERN's comprehensive health scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund.
• Depending on your individual circumstances: installation grant; family, child and infant allowances; payment of travel expenses at the beginning and end of contract.
• 30 days of paid leave per year.
• On-the-job and formal training at CERN as well as in-house language courses for English and/or French.

About us

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. Find out more on http://home.cern.

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.