| Member States | Contact / Institution |
| Austria | Director of the Institute of High Energy Physics (HEPHY), Vienna |
| Belgium | Secretary General of the Fund for Scientific Research – FNRS, Brussels |
| Bulgaria | Bulgarian Scientific Council Delegate and Chair of Bulgarian CERN Commission |
| Czech Republic | Czech Scientific Council Delegate and Chair of the Committee for collaboration of the Czech Republic with CERN |
| Denmark | Director of the National Instrument Center for CERN Experiments (NICE) |
| Finland | Director of the Helsinki Institute of Physics |
| France | Director of the Institute of Research into Fundamental Laws of the Universe (Irfu), CEA Saclay; Director of the Particle Physics Division of the Institut National de Physique Nucléaire et de Physique des Particules (IN2P3 – CNRS), Paris |
| Germany | Chair of Komitee für Elementarteilchenphysik (KET) |
| Greece | President of the Hellenic Society for the Study of High Energy Physics |
| Hungary | President of the National Research, Development and Innovation Office, Budapest |
| Israel | Israeli Scientific Council Delegate and Chair of Israeli HEP Committee |
| Italy | President of Istituto Nazionale di Fisica Nucleare (INFN), Rome |
| Netherlands | Director of the National Institute for Subatomic Physics (Nikhef), Amsterdam |
| Norway | Chair of the Norwegian CERN Committee |
| Poland | Head of Polish Consortium of Particle Physics (PCPP) |
| Portugal | President of FCT – Fundação para a Ciência e a Tecnologia, Lisbon |
| Romania | Director General of the Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH) |
| Serbia | Serbian Scientific Council Delegate and Chair of the Committee for relations with CERN |
| Slovak Republic | Director General of the Science and Research Division of the Ministry of Education, Science, Research and Sport, Bratislava |
| Slovenia | Director-General of the Science Directorate of the Ministry of Education, Science and Sport |
| Spain | Scientific Manager of the Spanish FPA High Energy Physics Program |
| Sweden | Chair of the Section for Elementary and Astroparticle Physics of the Swedish Physical Society |
| Switzerland | Chair of the Board of the Swiss Institute of Particle Physics (CHIPP) |
| United Kingdom | Chair of the Particle Physics Users Advisory Committee (PPUAC) |
| Associate Members in the pre-stage of Membership | |
| Cyprus | Cyprian Scientific Council Delegate |
| Estonia | N.N. |
| Associate Members | |
| Croatia | N.N. |
| India | Secretary and Head Institutional Collaboration and Programs Division, NCPW, DAE of the Government of India Atomic Energy Commission |
| Latvia | N.N. |
| Lithuania | Lithuanian Council Delegate + Vice-Minister of the Ministry of Education and Science |
| Pakistan | Chair of the Joint CERN-Pakistan Committee |
| Turkey | Head of the Research, Development and Coordination Department of the Turkish Atomic Energy Authority (TAEK), Ankara |
| Ukraine | Ukranian Scientific Council Delegate |