Your responsibilities

The Radiation Protection (RP) Group of the Occupational Health and Safety and Environmental Protection (HSE) Unit ensures that personnel on the CERN sites and the public are protected from potentially harmful effects of ionizing radiation linked to CERN activities. The duties of CERN's Radiation Protection Group include the assessment of radiation hazards from operating accelerators and experiments, the definition of protective measures as well as the legally required monitoring of the exposure of radiation workers and public to ionising radiation.

You would join the HSE-RP-AS (Accelerators & Sites) section who is in charge of all radiation protection aspects related to the design and operation of accelerators and experimental areas at CERN. This role would primarily be based at the Prévessin Site and includes the four Large Experiments at the Large Hadron Collider (LHC), namely ATLAS, CMS, LHCb and ALICE.

This position offers a unique chance to develop hands-on expertise in operational radiation protection. Through close involvement in field operations and planning, you will become proficient with radiation monitoring instruments, radiological risk assessments, and the practical application of the ALARA ("As Low As Reasonably Achievable") principle.

Your operational responsibilities will include:

• Support the team activities by performing radiation survey measurements.
• Become familiar with and apply CERN's computer tools.
• Support the team in handling and managing radioactive material.
• Take part in the ALARA preparation and follow-up of activities in Radiation Areas.
• Conduct measurements and radiation protection follow-up in preparation and during the Long-Shutdown 3.
• Document results in detailed reports, technical notes, and other written documents.
• Engage with interdisciplinary teams across CERN to support safe and efficient operations in radiation areas.

Your profile

Skills

• Comprehensive use of Radiation Protection instruments.
• Knowledge in radiation hazards and ALARA approach.
• Communicating effectively and efficiently in both written and spoken format.
• Ability to work effectively in multidisciplinary teams with members from diverse cultural and professional backgrounds.
• Demonstrating flexibility and adaptability.
• Spoken and written English or French, with a commitment to learn the other language.

Eligibility criteria:

• You are a national of a CERN Member or Associate Member State.
• By the application deadline, you have a maximum of two years of professional experience since graduation in Radiation Protection (or a related field) and your highest educational qualification is either a Bachelor's or Master's degree.
• You have never had a CERN fellow or graduate contract before.
• Applicants without University degree are not eligible.
• Applicants with a PhD are not eligible.

Additional Information

Job closing date: 26.10.2025 at 23:59 CEST.

Contract duration: 24 months, with a possible extension up to 36 months maximum.

Working hours: 40 hours per week

Target start date: 01-April-2026

This position involves:

• Work in Radiation Areas.
• Interventions in underground installations.
• A valid driving licence.
• Exposure to electromagnetic fields under certain exposure conditions.

Given the occupational health risks associated with this position, the selected candidate must obtain medical clearance before a contract offer is confirmed.

Job reference: HSE-RP-AS-2025-177-GRAE

Field of work: Health, Safety and Environment

What we offer

• A monthly stipend ranging between 5196 and 5716 Swiss Francs (net of tax).
• Coverage by CERN's comprehensive health scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund.
• Depending on your individual circumstances: installation grant; family, child and infant allowances; payment of travel expenses at the beginning and end of contract.
• 30 days of paid leave per year.
• On-the-job and formal training at CERN as well as in-house language courses for English and/or French.

About us

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 http://home.cern.

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.