Mechanical Safety Engineer


Company Description

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. Find out more on

Job Description


Are you a qualified and proactive Mechanical Safety Engineer, willing to contribute to a unique work environment at the heart of one of the world's most complex and exciting scientific experiments? Then this opportunity is for you. Join the largest particle physics research laboratory in the world! CERN, take part!

As a Mechanical Safety Engineer, you will join the HSE unit, which supports CERN in the implementation and application of its safety policy, and the OHS Group, which is in charge of providing advice, monitoring and following-up on the implementation and accomplishment of safety objectives, aimed at a continuous improvement of a safe working environment. Within the OHS group, you will join the Process Engineering & General Safety Services (PE) Section.

You will be one of the CERN specialists for mechanical safety, covering several subdomains of mechanical engineering and joining a multidisciplinary team of safety experts.


Mechanical safety comprises subdomains such as cryogenics, pressure equipment, lifting and handling equipment, welding, machinery, metallic structures and lifts. For each of these fields, you will be the responsible for the definition and monitoring of the implementation of CERN’s Safety Policy.

You will:

  • Support, verify and validate mechanical design calculations prepared by different CERN technical departments. This activity can relate to highly specialised equipment, not fully covered by common standards.
  • Contribute to the Project and Experiment Safety Support activity of the HSE-OHS group for CERN projects follow-up, internally coordinating different safety specialists in defining exhaustive safety requirements for experimental facilities, installations and equipment.
  • Provide support in safety risk assessment and risk control, equipment integrity, inspection, audits and technical reviews.
  • Check conformity of engineering and tendering specifications and fabricated equipment with standard safety requirements.
  • Design and deliver safety training related to all the mechanical domains, in collaboration with CERN’s Safety Training section.
  • Write and update CERN Safety documentation including rules, instructions and guidelines.



Master's degree or equivalent relevant experience in the field of Mechanical Engineering or a related field.


The experience required for this post is:

  • Proven experience in analytical design and validation in accordance with harmonised European standards of mechanical equipment and installations such as pressure equipment and metallic structures.
  • Proven experience in the application of standards and Directives related to lifting and handling equipment, welding, machinery and machine-tools or cryogenics.
  • Proven experience with fabrication and commissioning of mechanical systems and components.
  • Demonstrated experience in the use of Finite Elements-based software packages: ability to assess the resistance and the performance of pressure vessels in order to verify their compliance to the applicable safety requirements.

Technical competencies:

  • Occupational safety and risk management: knowledge of safety risk assessment methodologies/tools and risk management.
  • Knowledge of design codes and compliance verification of mechanical equipment: capability to design mechanical equipment or installations from the study phase to operation, including definition of the technical solutions, calculations, constructions, commissioning and functioning supervision.
  • Design and analysis of mechanical structures: knowledge of Finite Element methods and capability to carry out and assess FE analyses. Knowledge of relevant European Directives, Regulations and standards.
  • Assembly of mechanical structures and equipment: knowledge of manufacturing methods, processes, preparation, planning, drawing, and control and related safety certification.
  • Knowledge and understanding of health and safety legal issues: good knowledge of the European regulatory framework (Directives and standards), in particular related to pressure equipment and machinery.


Behavioural competencies:

  • Working in Teams: cooperating constructively with others in the pursuit of team goals; balancing personal goals with team goals.
  • Solving Problems: producing workable and timely solutions that meet requirements Identifying, defining and assessing problems, taking action to address them
  • Demonstrating Flexibility: adapting quickly and resourcefully to shifting priorities and requirements Being willing to work on different projects simultaneously
  • Achieving Results: delivering prompt and efficient service taking into account customer needs
  • Communicating Effectively: delivering presentations in a structured and clear way; adjusting style and content to the audience; responding calmly and confidently to questions

Language skills:

  • English or French: spoken and written, with the ability to draw-up safety documentation, reports and articles and/or to make oral presentations.
  • Knowledge in the other language, or the undertaking to acquire it rapidly.


Additional Information

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 23.03.2022 at noon (12h00 PM CET).

Employment Conditions

Contract type: Limited duration contract (5 years). Subject to certain conditions, holders of limited-duration contracts may apply for an indefinite position.

These functions require:

  • Work in Radiation Areas.
  • Interventions in underground installations.
  • A valid driving licence is required.
  • Work during nights, Sundays and official holidays, when required by the needs of the Organization.

Job grade: 6-7

Job reference: HSE-OHS-PE-2022-23-LD

Benchmark Job Title: Health, Safety and Environment Engineer