In 2021, the CERN management underwent some changes, however its activities remained grouped into four sectors:

• Accelerator and Technology (ATS)
• Finance and Human Resources (FHR)
• International Relations (IR)
• Research and Computing (RC)

A new department called Accelerator Systems (SY) Department was integrated within the Accelerator and Technology Sector (ATS).

The SY department is responsible for the accelerator beam-related technical systems of: Beam Instrumentation, Beam Transfer, Electrical Power Converters, Radio Frequency, Targets, Collimators and Absorbers.