Introduction
You will join the CMS experiment Engineering & Integration team to work on the upgrade of the detector for High-Luminosity Large Hadron Collider (HL-LHC). Your activity will be focused on the construction and commissioning of the new detector environmental monitoring system and the engineering and integration of the Machine Detector Interface, for which concerns the integration of the HL-LHC accelerator elements in the detector forward region.
Responsibilities
* Participate in the design, construction, and installation of new detectors and their infrastructure.
* Contribute to the integration and commissioning of detectors.
* Work within the technical coordination team on the CMS experiment upgrades for the high-luminosity phase of the Large Hadron Collider (HL-LHC).
* Contribute to the tasks of the CMS Engineering & Integration Office, by participating in concurrent multidisciplinary projects.
* Take a leading role in the integration, construction, and commissioning of the CMS environmental monitoring system.
* Take the lead in the integration of the different elements of the accelerator in the forward region of the detector (beampipe vacuum pumping system, radiation shielding, etc.).
* Write up technical specifications for the procurement of goods for the upgrade of the CMS detector.
* Present your work to the CMS Collaboration via technical reports and talks at relevant conferences and workshops.
Requirements
Qualifications: Master's Degree or equivalent relevant experience in the field of Mechanical Engineering or a related field.
Experience:
* Demonstrated experience in the geometrical and functional integration of complex systems, using a multidisciplinary approach.
* Proven ability in designing mechanical assemblies using 3D CAD tools (preferably CATIA), and in performing thermal and structural calculations of complex mechanical structures with FEA methods (preferably Ansys).
* Strong background in writing technical specifications and following up on supplies.
* Experience in planning and coordination of activities on the field.
* Initial experience in designing and building PLC-based data acquisition and control systems (preferably using Siemens hardware).
Technical competencies:
* Assembly of mechanical structures and equipment.
* Knowledge and application of numerical modelling in solid mechanics.
* Integration of mechanical systems.
* Production of 2D drawings and 3D models.
* Knowledge of design codes and compliance verification of mechanical equipment.
* Knowledge and application of instrumentation and measurement techniques.
Behavioural competencies:
* Achieving Results: delivering high quality work on time and fulfilling expectations.
* Learning and Sharing Knowledge: proposing ways to improve or streamline existing procedures, processes and methodologies.
* Solving Problems: addressing complex problems by breaking them down into manageable components.
Language skills: Spoken and written English or French, with a commitment to learn the other language.
Employment Conditions
* Contract type: Limited duration contract (5 years). Subject to certain conditions, holders of limited-duration contracts may apply for an indefinite position.
* Working Hours: 40 hours per week.
* Job Flexibility: Fully Onsite.
* Job grade: 6-7.
* Job reference: EP-CMS-SSI-2026-86-LD.
* Field of work: Mechanical Engineering.
* Benchmark Job Title: Mechanical Engineer.
* Eligibility: Diversity is central to CERN’s mission. We welcome applications from all Member States and Associate Member States.
* Closing date: 07.05.2026 at 23:59 CEST.
Additional job requirements
* Work in Radiation Areas.
* Interventions in underground installations.
* A valid driving licence.
* Radiation worker, category A.
* Exposure to electromagnetic fields under certain exposure conditions.
* Must obtain medical clearance before a contract offer is confirmed.
Benefits
* A competitive salary (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.
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