Mechanical Engineer

Mechanical Engineer

European Organization for Nuclear Research (CERN)

November 13, 2025December 28, 2025GenevaSwitzerland
European Organization for Nuclear Research (CERN) About
At CERN, the European Organization for Nuclear Research, physicists and engineers are probing the fundamental structure of the universe. They use the world's largest and most complex scientific instruments to study the basic constituents of matter – the fundamental particles.
Job Description
Job Posting Organization:
CERN, the European Organisation for Nuclear Research, is a leading scientific research organization established in 195
  • It is located in Geneva, Switzerland, and is known for its groundbreaking work in particle physics. CERN employs over 2,500 staff members and collaborates with thousands of scientists from around the world, representing more than 100 nationalities. The organization operates in multiple countries and is dedicated to advancing our understanding of the universe through innovative research and technology.

Job Overview:
The Mechanical Engineer position at CERN involves joining a multidisciplinary project team focused on the design, fabrication, and testing of components for the High-Luminosity Large Hadron Collider (HL-LHC). The successful candidate will be responsible for managing the fabrication of cryogenic distribution lines, utilizing a variety of technologies either at CERN or through subcontracting. This role requires a strong understanding of mechanical engineering principles, fabrication methods, and quality assurance processes. The engineer will work closely with other engineering teams, providing technical advice and ensuring that all components meet the necessary standards for safety and reliability. The position also involves preparing documentation, managing project timelines, and estimating costs and resources for fabrication activities.

Duties and Responsibilities:
The Mechanical Engineer will manage the fabrication of mechanical components and assemblies for the Cryogenic Distribution Lines for the HL-LHC project, subcontracted to industrial suppliers. Key responsibilities include defining and procuring raw materials, preparing fabrication sequences and welding procedures, and ensuring quality assurance in line with relevant standards. The engineer will contribute to the mechanical design of components, focusing on manufacturing drawings, and will participate in a multi-technology project, collaborating with various engineering teams. Additionally, the role involves providing technical advice on fabrication methods, preparing and managing technical documentation, and reporting on project progress, including time, cost, and resource estimates.

Required Qualifications:
Candidates must possess a Master's degree or equivalent relevant experience in Mechanical Engineering or a related field. An International Welding Engineer (IWE) Diploma is desired but not mandatory. The ideal candidate will have demonstrated experience in mechanical fabrication, particularly in welding, machining, and metal sheet working, as well as familiarity with industrial standards. Knowledge of quality management processes and experience in reading technical drawings according to ISO GD&T standards are essential. Familiarity with the fabrication of pressure vessels and cryogenics, as well as initial experience in coordinating fabrication projects, will be considered an asset.

Educational Background:
A Master's degree in Mechanical Engineering or a related field is required for this position. Candidates with equivalent relevant experience may also be considered. Additional certifications, such as an International Welding Engineer (IWE) Diploma, are advantageous and may enhance a candidate's application.

Experience:
The position requires demonstrated experience in mechanical fabrication and related methods, particularly in welding, machining, and mechanical assembly. Candidates should have a professional background in industry or research centers, applying industrial standards. Experience with quality management processes, including knowledge of quality control procedures and standards applicable to mechanical production, is essential. Familiarity with the fabrication of pressure vessels, vacuum chambers, and cryogenics is also beneficial, as is initial experience in coordinating fabrication projects from design to production follow-up.

Languages:
Fluency in spoken and written English is mandatory for this position, as it is the primary working language at CERN. Candidates should also have a commitment to learning French, which is beneficial for communication within the organization and the local community.

Additional Notes:
This position is a limited duration contract for 4 years, with the possibility of applying for an indefinite position subject to certain conditions. The working hours are 40 hours per week, and the job is fully onsite at CERN. The role may involve working in radiation areas, and candidates must possess a valid driving license. Additionally, the position may require work during nights, Sundays, and official holidays, as well as shift work, depending on the needs of the organization. The job grade for this position is 6-7, and the reference for this job is EN-MME-FS-2025-243-LD.
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