Mechanical Engineer

Job Posting Organization:
CERN, the European Organization for Nuclear Research, is a renowned international research organization established in 195

• It is headquartered in Geneva, Switzerland, and employs over 2,500 staff members from various countries. CERN operates in multiple countries and is known for its cutting-edge research in particle physics, utilizing the world's largest and most complex scientific instruments to explore the fundamental structure of the universe. The organization is committed to advancing scientific knowledge and fostering international collaboration in research.

Job Overview:
The Mechanical Engineer position at CERN involves working within the CMS Experiment Systems Group, specifically in the Endcap Calorimetry section. The role is centered around the development, procurement, assembly, and testing of innovative mechanical structures for the High Granularity Calorimeter (HGCAL) project. This project is a significant upgrade to the CMS detector, which is part of the Large Hadron Collider (LHC) at CERN. The successful candidate will engage in the design and integration of the detector, ensuring that it meets the challenging requirements of precision measurement in particle physics. The role requires collaboration with a multidisciplinary team, including physicists, engineers, and technicians, to oversee the construction and installation of the HGCAL detector, which will operate under extreme conditions. The position demands a proactive approach to problem-solving and a commitment to high-quality engineering practices.

Duties and Responsibilities:
As a Mechanical Engineer in the HGCAL team, your responsibilities will include:

• Finalizing the design and integration of the HGCAL detector and its associated services, including the cooling system.
• Performing structural and thermal calculations on the HGCAL structures using Finite Element Analysis (FEA) to optimize designs.
• Coordinating the fabrication of prototypes and mock-ups, and measuring their mechanical and thermal performance in dedicated test systems.
• Participating in the procurement, assembly, and testing of the HGCAL detector, ensuring successful installation and commissioning within the CMS framework.
• Drafting technical specifications and scientific reports, as well as delivering oral presentations on project progress.
• Supervising and mentoring technicians, graduates, and students involved in the project.

Required Qualifications:
Candidates must possess a Master's degree or equivalent relevant experience in Mechanical Engineering or a related field. Additionally, the following qualifications are essential:

• Demonstrated experience in performing thermal and structural calculations of complex mechanical structures using FEA.
• Proven ability to develop mechanical assemblies with 3D CAD software.
• Initial experience in planning and coordinating the fabrication and assembly of mechanical systems.
• Proficiency in producing 2D drawings and 3D models, particularly using Catia V5 or equivalent software.
• Knowledge of manufacturing methods and assembly techniques, including bolted and welded structures.
• Familiarity with mechanical measurement techniques and quality control methods.

Educational Background:
A Master's degree in Mechanical Engineering or a closely related field is required for this position. Candidates with equivalent relevant experience may also be considered. The educational background should include a strong foundation in mechanical design, materials science, and engineering principles relevant to the development of complex mechanical systems.

Experience:
The position requires candidates to have substantial experience in mechanical engineering, particularly in the areas of thermal and structural analysis. Candidates should have a proven track record of working with FEA tools and 3D CAD software, as well as experience in the fabrication and assembly of mechanical systems. Initial experience in project management and coordination within cross-functional teams is also beneficial.

Languages:
Fluency in spoken and written English is mandatory for this position, as it is the primary working language at CERN. Candidates are also expected to demonstrate a commitment to learning French, which is advantageous for collaboration within the organization and the local community.

Additional Notes:
This position is a limited duration contract for 5 years, with the possibility of applying for an indefinite position subject to certain conditions. The role requires a commitment to a 40-hour work week, with potential work in radiation areas and underground installations. Candidates must possess a valid driving license and may be required to work during nights, Sundays, and official holidays as needed by the organization. The job grade for this position is 6-7, and the job reference is EP-CMX-EC-2025-102-LD.