Mechanical Safety Engineer (HSE-OHS-XP-2018-123-LD)

  • Geneva, Switzerland
  • Contract

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 Engineer, willing to become an expert advisor in mechanical safety 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:

CERN's Occupational Health & Safety and Environmental Protection Unit (HSE), the Organization's centre of competence in matters of safety. The Health and Safety Unit supports the Organization in striving to maintain excellence in safety, and an indispensable requirement for sustainable research.

The HSE unit contributes to CERN's safety policy, writes CERN specific safety rules, and coordinates CERN's HSE matters with the respective Host State bodies. The HSE unit advises CERN's management, supports facility operators; and projects leaders in identifying safety risks and state of the art solutions; whilst monitoring the efficiency of the implemented measures. The HSE unit is responsible for advice in occupational health & safety, environmental protection, and is fully accountable for radiation protection and for CERN's Fire Brigade.

Within the HSE unit, the Occupational Health & Safety (OHS) Group acts as expert advisor in all safety domains ranging from general, mechanical, chemical, electrical, fire and cryogenic safety. In addition, the OHS Group is responsible for occupational medicine at CERN. The Group monitors and performs independent checks adapted to the needs of the Departments with the aim of enhancing prevention and ensuring that all safety aspects are integrated from the earliest stage of any project and that best safety practices are shared, harmonised, and disseminated.


As a Mechanical Safety Engineer in the Prevention & Safety Engineering Expertise Section of HSE-OHS, you will take up the role of CERN specialist for mechanical safety, covering several subdomains of mechanical engineering and joining a multidisciplinary team of safety experts.

In particular, mechanical safety comprises subdomains such as cryogenics, pressure equipment, handling and lifting equipment, welding, machinery, metallic structures, machine-tools, 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.

As a mechanical safety expert, you will:

  • Support, verify, and validate the 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 projects/experiments 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.
  • Check the conformity of engineering and tendering specifications and fabricated equipment with state of the art mechanical safety requirements.
  • Design and deliver safety training related to all mechanical domains, if required by the Organization.
  • Provide support in safety risk assessment and risk control, equipment integrity, audits, and technical reviews.
  • Write CERN safety documentation including rules, instructions, and guidelines.


Master's degree, or equivalent relevant experience in the field of mechanical engineering. Professional certification in the field of mechanical safety or a related field, is an asset. 


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 handling and lifting equipment, welding, machinery, and machine-tools or cryogenics.
  • Proven experience in developing solutions in fields where mechanical standards and directives cannot be applied.
  • Demonstrated experience in the use of Finite Elements-based software packages (familiarity with ANSYS workbench is particularly appreciated): ability to assess the resistance and the performance of pressure vessels in order to verify their compliance to the applicable safety requirements.
  • Experience with the supervision of the construction and commissioning of mechanical systems and components would be an advantage.

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.
  • Design and analysis of mechanical structures: knowledge of Finite Element methods and capability to carry out and assess FE analyses.
  • 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:

  • Communicating effectively: demonstrating a pro-active approach to resolving differences; addressing issues of conflict constructively.
  • Demonstrating flexibility: adapting quickly and resourcefully to shifting priorities and requirements; being willing to work on different projects simultaneously.
  • 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 accountability: taking responsibility for own actions and decisions.

Language skills:

  • English: spoken and written, with the ability to draw-up safety documentation, reports and articles and to make oral presentations.
  • The ability to understand and speak French in professional contexts would be an advantage.

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 12.12.2018.

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.
  • Work during nights, Sundays and official holidays, when required by the needs of the Organization.

Job grade: 6-7

Job reference: HSE-OHS-XP-2018-123-LD

Benchmark Job Title: Health, Safety and Environment Engineer

Please make sure you have all the documents needed to hand as you start your application, as once it is submitted, you will not be able to upload any documents or edit your application further.

Privacy Policy