TREF Composition as from January 2023
| Chair | Professor Barbro Åsman |
| Austria | Mr Christoph Wieland |
| Belgium | Professor Dirk Ryckbosch |
| Bulgaria | Ms Zornitsa Todorova |
| Czech Republic | Mr Ondřej Novák |
| Denmark | Mr Bjarke Stoltze Kaspersen |
| Finland | Mr Pietari Kauttu |
| France | Ms Nathalie Prentout |
| Germany | Ms Sarah Kudling |
| Greece | Professor Konstantinos Fountas |
| Hungary | Dr Györgyi Juhász |
| Israel | Ms Leora Hadar |
| Italy | Professor Cristina Biino |
| Netherlands | Ms Mirjam Lieshout-Vijverberg |
| Norway | Professor Eivind Osnes |
| Poland | Dr Dariusz Drewniak |
| Portugal | Mr André Ortega Costa |
| Romania | Ms Cristina Melinte |
| Serbia | Mr Miroslav Zotović |
| Slovakia | Professor Stanislav Tokár |
| Spain | Ms Carmen Gómez Sánchez |
| Sweden | Dr Mathias Hamberg |
| Switzerland | Ms Melissa Lucarelli |
| United Kingdom | Ms Sarah Verth (Vice-Chair) |
| CERN Management | Mr Raphael Bello Dr Manfred Krammer Mr James Purvis |
| Staff Association | Mr Joel Lahaye Ms Isabelle Mardirossian Ms Almudena Solero |
| Ex-Officio Members | Dr Fabiola Gianotti, Director-General Professor Eliezer Rabinovici, President of Council Dr Laurent Salzarulo, FC Chair |
| Secretary | Ms Cécile Curdy |