The CERN Council’s resolutions concerning the Russian Federation following the invasion of Ukraine can be found here.

Individual contacts with scientists from the then Soviet Union started in 1964. The scientific cooperation with CERN is based on various Agreements and Protocols with the first one signed in 1967.

The Russian Federation was granted observer status to the CERN Council in 1991 before it was suspended in March 2022.

The 1996 Protocol on the participation in the LHC project defined the first Russian contributions to the LHC accelerator. The 2002 Extension to this Agreement brought an additional contribution to the LHC accelerator.

In 2006, the Russia Federation signed the Memoranda of Understanding for the Maintenance and Operation (MoUs for M&O) for the four LHC experiments, and the Russian Institutes are active in the LHC physics programmes. A new International Cooperation Agreement with the Russian Federation was signed in April 2019 and is in force since 1 December 2019.

During the CERN Council Session in December 2023 a decision was taken on the International Cooperation Agreement (ICA) with the Russian Federation in light of the ongoing invasion of Ukraine by the Russian Federation. The Council decided that CERN's cooperation with the Russian Federation will conclude in 2024 upon the expiry of the ICA. The cooperation will come to an end on 30 November 2024. All relations between CERN and Russian institutions will cease as of this date. Relations continue with scientists of Russian nationality otherwise affiliated with CERN.

The Russia Federation currently participates in the WLCG as a federation of several centres at the Tier-2 level (RuTier-2), supporting all four LHC experiments.

The Russian Federation participated in the Linac4 project through three R&D projects, fully financed by the International Science & Technology Center (ISTC). Russian institutes are also contributing to the CLIC/CTF3 R&D programme and to other smaller experiments such as LHCf, AEGIS, ASACUSA, CAST, CLOUD, COMPASS, DIRAC, NA61, NA62, NA63, n_TOF and OPERA.