Mechanical Engineer

Mechanical Engineer

European Organization for Nuclear Research (CERN)

December 15, 2025January 29, 2026GenevaSwitzerland
Job Description
Job Posting Organization:
CERN, the European Organization for Nuclear Research, was established in 1954 and is one of the world's largest and most respected centers for scientific research. With over 2,500 employees and thousands of scientists from around the globe, CERN operates in multiple countries and is dedicated to pushing the frontiers of science and technology. The organization is known for its groundbreaking work in particle physics, which has led to significant discoveries and advancements in our understanding of the universe. CERN fosters an environment of innovation and collaboration, bringing together physicists, engineers, and a diverse range of professionals to tackle complex scientific challenges. Diversity is a core value at CERN, and the organization is committed to creating an inclusive community where every contribution is valued and every individual can thrive.

Job Overview:
The Mechanical Engineer position at CERN involves overseeing the production and installation of cryogenic Beam Position Monitors (BPMs) and managing the detailed design work for room-temperature Crab Cavities BPMs. The role requires a strong focus on logistics, ensuring the BPMs are moved efficiently across CERN for various assembly steps. The engineer will be responsible for ensuring that all assembly processes, including laser welding, copper plating, vacuum cleaning, and leak checks, are executed according to technical specifications. The position also involves using CAD tools for design purposes, applying knowledge of Ultra-High Vacuum systems, manufacturing techniques, and quality assurance. Effective communication with project groups and problem-solving skills are essential, as the engineer will guide decision-making processes based on scientific principles. This role is crucial for the successful integration of BPMs into larger assemblies and contributes significantly to the overall project goals.

Duties and Responsibilities:
  • Follow up on the production of cryogenic Beam Position Monitors (BPMs) and oversee their installation on the beam screen, ensuring they are correctly inserted into the magnets.
  • Manage the logistics of moving BPMs across CERN for various assembly steps, either personally or through the CERN internal transport service.
  • Ensure that all assembly steps, including laser welding, copper plating, vacuum cleaning, leak checks, pressure checks, and integration of BPMs into larger assemblies, are carried out as specified in the technical specifications.
  • Utilize CAD tools for the detailed design of BPMs, applying knowledge of Ultra-High Vacuum systems, manufacturing techniques, surface coatings, welding techniques, beam impedance, and quality assurance.
  • Communicate effectively with other project groups and present the status and progress of work.
  • Engage in problem-solving, including the design of tooling as required.
  • Guide decision-making processes based on scientific principles and ensure high-quality standards are maintained throughout the project.

Required Qualifications:
Candidates must have proven experience in mechanical assemblies or design studies, either through their academic studies or other relevant experiences. They should possess skills in working with CAD tools and have a basic knowledge of at least three of the following areas: Design of Ultra-High Vacuum (UHV) systems, CAD design, logistics, production processes, quality control, and quality assurance. The ability to work collaboratively in teams and present work status to other project groups is essential. A passion for product quality is also a key qualification for this role.

Educational Background:
Applicants must hold a Bachelor's or Master's degree in Mechanical Engineering or a related field. Those without a university degree are not eligible for this position, and applicants with a PhD are also not eligible. The educational qualifications must be completed by the application deadline, and candidates should have a maximum of two years of professional experience since graduation.

Experience:
The position requires candidates to have a maximum of two years of professional experience in the field of Mechanical Engineering or a related area. This experience can be gained through internships, academic projects, or relevant employment after graduation. It is essential that candidates have not previously held a CERN fellow or graduate contract.

Languages:
Fluency in both spoken and written English and French is mandatory for this position. This bilingual requirement is crucial for effective communication within the diverse teams at CERN and for presenting project updates to various stakeholders.

Additional Notes:
The contract duration for this position is 24 months, with the possibility of extension up to a maximum of 36 months. The working hours are set at 40 hours per week, and the position is fully onsite. The target start date for this role is May 1, 202
  • The job involves working in radiation areas and may require interventions in underground installations. A valid driving license is also necessary. The job reference for this position is SY-BI-ML-2025-282-GRAE. The compensation includes a monthly stipend ranging from 5196 to 5716 Swiss Francs, which is tax-free, along with 30 days of paid leave per year, comprehensive health insurance coverage, family allowances, and a relocation package depending on individual circumstances.
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