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The people, structure and management of HSE

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“My vision for the HSE Department is to ensure the safe completion of LS3 and a smooth transition into the HL-LHC era, while proactively shaping CERN’s Safety culture for future projects, equally prioritising care for people, technical excellence, and environmental stewardship.”


– Benoît Delille, HSE Department Head

Structure & Management

Benoît Delille

Department Head (DH)

Sonja Kleiner

Deputy Department Head (DDH)

Julia Double

Assistant to the Department Head (ADH)

Yann Donjoux

Departmental Planning Officer (DPO)

Roxana Banica

Departmental Administrative Officer (DAO)

Nathalie Del Vicario

Departmental Contract Coordinator

Julia Double

Departmental Training Officer (DTO)

Tom Humphreys

Human Resources Advisor (HRA)

Fabrice Malacrida

Departmental Safety Officer (DSO & DDSO)

View the HSE Organigram

The list of various HSE roles can be consulted here.

Other mandates: HSE MERIT Coordinator, HSE Technical Officer, HSE Technical Contact, Mandate of the group administrative officer (GAO)

Groups in HSE

The HSE Department is supervised by the Director General, and is made up of 5 groups:
Environmental Protection | Occupational Health and Safety | CERN Fire and Rescue Service | Radiation Protection | HSE Transversal Services

Fire & Rescue Service
HSE-FRS

Our mission: saving lives, protecting our environment, safeguarding property, and ensuring continuity of CERN’s operations.

Radiation Protection Group
HSE-RP

The Radiation Protection Group (HSE-RP) of the HSE Department ensures that personnel on the CERN sites and the public are protected from potentially harmful effects of ionizing radiation linked to CERN activities.

Environmental Protection Group
HSE-ENV

The Environment Group (HSE-ENV) ensures, in collaboration with all other groups of the HSE Unit, that the impact of the Organization’s activities on the public and the environment is monitored and that that CERN’s environmental concerns and related actions are communicated to the personnel, the Host States Authorities and the public. 

Transversal Services Group
HSE-TS

The Transversal Services Group, HSE-TS supports HSE activities and the Groups of the HSE Department

Occupational Health and Safety Group
HSE-OHS

The Occupational Health and Safety (OHS) group provides expert assistance to CERN activities in matters of Safety, monitoring and reducing hazards and incidents on site, and ensuring compliance with both CERN and host state health and safety regulation.

Fire & Rescue Service
HSE-FRS

Our mission: saving lives, protecting our environment, safeguarding property, and ensuring continuity of CERN’s operations.

Radiation Protection Group
HSE-RP

The Radiation Protection Group (HSE-RP) of the HSE Department ensures that personnel on the CERN sites and the public are protected from potentially harmful effects of ionizing radiation linked to CERN activities.