In 2026 the CERN Management adopted a new organizational structure.The Site Operations Sector, newly created, is responsible for planning, transforming and delivering non-scientific operational services and expertise, and continuously optimising day-to-day site operations so that every CERN department and the wider community can focus on world-leading research.

The SO sector comprised three departments and two services:

• Occupational Health and Safety and Environmental Protection department
• Site and Civil Engineering department
• Organisational Support and Improvement department 
• Internal and Investigations service
• Legal Service.