Mechanical Technical Engineer (SY-STI-TCD-2025-173-LD)

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.

Introduction:

We are looking for a mechanical systems technical engineer to join a multidisciplinary team developing and upgrading some of the most advanced beam-intercepting devices in the world. From the High-Luminosity LHC upgrades to key facilities like n_TOF, AD, and HI-ECN3, you will play a hands-on role in projects that push the boundaries of engineering and science. 

You will join the Accelerator Systems Department (SY), which is responsible for the beam-related technical systems of the CERN accelerators. The SY teams design, build and operate systems in all CERN accelerators, and are engaged in ambitious forward-looking R&D programmes. 

As part of the Sources Targets Interactions Group, and specifically the Targets, Collimators, and Dumps Section, you will help deliver safe, efficient, and high-performance solutions for some of the most intense particle beams on Earth. 

Functions:

As a mechanical systems technical engineer, you will play a key role in the design, construction, upgrade, and maintenance of beam-intercepting devices across CERN’s accelerator complex. 

After training, you will contribute to both hands-on technical work and coordination of major projects, including future facilities beyond the HL-LHC era.

Your responsibilities will include:

• Lead the assembly, installation, testing, and maintenance of LHC collimators and other key systems.
• Support the design and production of precision components and tools in collaboration with engineers and technicians.
• Operate and maintain beam-intercepting devices and related infrastructure.
• Develop tools and solutions for safe maintenance in radiation zones, including remote handling systems.
• Investigate equipment issues and implementing repairs and design improvements.
• Take progressive responsibility for target systems and test areas like n_TOF and AD, including their integration and optimization.
• Manage technical documentation, procedures, and specifications.
• Participate in procurement and supplier coordination for complex systems.
• Support decommissioning, inspection, and disposal of irradiated components.

Bachelor's degree or equivalent relevant experience in the field of mechanical engineering or a related field.

Experience:

Required experience:

• Assembly and installation of complex mechanical systems, ideally in harsh environments. 
• Managing complex systems and interfaces, with a focus on mechanical performance and reliability. 
• Design and structural analysis of mechanical structures, including systems involving robotics or remote handling. 
• Professional use of CAD tools (2D and 3D) to model, draft, and document mechanical components and assemblies. 

Desired experience:

• Working in or around radiation-controlled environments. 
• Technical procurement experience, including liaising with suppliers and managing specifications for complex systems. 

Technical competencies:

• Assembly of mechanical structures and equipment.
• Knowledge and application of manufacturing methods and work preparation.
• Production of 2D drawings and 3D models.
• Specification and follow-up of technical aspects of a contract.
• Design and analysis of mechanical structures.

Behavioural competencies:

• Managing Self: working well autonomously; taking on activities and tasks without prompting; taking initiative beyond regular tasks and making things happen.
• Achieving Results: defining clear objectives, milestones and deliverables before initiating work/ project; delivering high quality work on time and fulfilling expectations.
• Working in the Interest of the Organization: demonstrating motivation for own work, being enthusiastic, involved and energetic in pursuing tasks.
• Communicating Effectively: expressing opinions, ideas and suggestions with conviction and in a logical/structured manner; keeping to the point.

Language skills:

Spoken and written English or French, with a commitment to learn the other language.

Eligibility and closing date:

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. We welcome applications from all Member States and Associate Member States.

This vacancy will be filled as soon as possible, and applications should normally reach us no later than 14.09.2025 at 23:59 CEST.

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

This position involves:

• Work in Radiation Areas.
• Interventions in underground installations.
• A valid driving licence.
• Given the occupational health risks associated with this position, the selected candidate must obtain medical clearance before a contract offer is confirmed.

Job grade: 4-5

Job reference: SY-STI-TCD-2025-173-LD

Benchmark Job Title: Mechanical Technical Engineer