- Action Chair: Prof Jose Manuel CARMONA
- Action Vice Chair: Prof Giovanni AMELINO CAMELIA
- WG 1 – Theoretical frameworks for gravity effects below the Planck energy
 Leader: Dr Christian PFEIFER
 Vice-Leader: Dr. Giulia GUBITOSI
- WG 2 – Phenomenology of quantum gravity
 Leader: Dr Flavio MERCATI
 Vice-Leader: Prof Stefano LIBERATI
- WG 3 – Gamma rays
 Leader: Dr Tomislav TERZIĆ
 Vice-Leader: Prof Julian SITAREK
- WG 4 – Neutrinos
 Leader: Dr Rodrigo GRACIA RUIZ
 Vice-Leader: Prof Carlos PÉREZ DE LOS HEROS
- WG 5 – Cosmic rays
 Leader: Dr Armando DI MATTEO
 Vice-Leader: Prof Günter SIGL
- WG 6 – Gravitational waves
 Leader: Dr Tanja HINDERER
 Vice-Leader: Dr Germano NARDINI
- Grant Holder Scientific Representative: Prof Manel MARTINEZ
- Science Communication Manager: Dr Mariam TÓRTOLA
- STSM Coordinator: Prof Dijana DOMINIS PRESTER
- ITC Conference Manager: Dr Julien BOLMONT
MANAGEMENT COMMITTEE (28 COST Members)
- Belgium Prof Juan Antonio AGUILAR SÁNCHEZ
- Bosnia and Herzegovina Dr Elvis BARAKOVIC
- Bosnia and Herzegovina Prof Vedad PASIC
- Bulgaria Prof Emil NISSIMOV
- Croatia Dr Tomislav TERZIĆ
- Croatia Prof Dijana DOMINIS PRESTER
- Czech Republic Dr Federico URBAN
- Denmark Prof Irene TAMBORRA
- Denmark Prof Niels OBERS
- Estonia Dr Christian PFEIFER
- Finland Dr Anca Tureanu
- Finland Prof Masud CHAICHIAN
- France Dr Julien BOLMONT
- France Dr Rodrigo GRACIA RUIZ
- Germany Prof Guenter SIGL
- Germany Prof Markus RISSE
- Greece Prof Emmanuel SARIDAKIS
- Greece Prof Nikolaos STERGIOULAS
- Hungary Dr Zoltán KERESZTES
- Hungary Prof Árpád László GERGELY
- Ireland Dr Peter TAYLOR
- Israel Prof Eduardo GUENDELMAN
- Italy Dr Giulia GUBITOSI
- Italy Prof Giovanni AMELINO CAMELIA
- Malta Dr Jackson LEVI SAID
- Netherlands Dr Andrea FUSTER
- Netherlands Dr Tanja HINDERER
- Norway Prof Germano NARDINI
- Poland Dr Jakub MIELCZAREK
- Poland Prof Jerzy KOWALSKI-GLIKMAN
- Portugal Prof Filipe JOAQUIM
- Romania Dr Nicoleta VOICU
- Romania Dr Vlad POPA
- Serbia Prof Goran DJORDJEVIC
- Serbia Prof Nikola KONJIK
- Slovenia Prof Gabrijela ZAHARIJAS
- Spain Dr Mariam TÓRTOLA
- Spain Prof Manel MARTINEZ
- Sweden Dr Roman PASECHNIK
- Sweden Prof Carlos PEREZ DE LOS HEROS
- Switzerland Dr Maria HANEY
- Switzerland Prof Philippe JETZER
- Turkey Dr Mehmet DEMIRCI
- Turkey Prof Deniz SUNAR ÇERÇİ
- United Kingdom Dr John VEITCH
- United Kingdom Prof Nikolaos MAVROMATOS
COST Near Neighbour Countries
| Country | Institution name | MC observer | 
| Armenia | Yerevan Physics Institute | Dr Ara Ioannisian, Ms Narine Kazaryan, Dr Elena Apresyan | 
| Russia | Instute for Nuclear Research of RAS (INR RAS), Moscow | Dr Petr Satunin, Dr Oleg Kalashev | 
COST International Partner Countries
| Country | Institution name | MC observer | 
| Kuwait | Kuwait University | Prof Elias Vagenas | 
| Iran | University of Guilan | Dr Yaser Tavakoli | 
| USA | University of New Hampshire | Prof David Mattingly | 
| China | Peking University | Prof Bo-Qiang Ma | 
| Chile | Universidad de Santiago de Chile | Prof Jorge Gamboa, Prof Fernando Méndez | 
| Canada | University of Lethbridge | Prof Saurya Das, Dr Pasquale Bosso | 
| Japan | Kyoto University | Prof Marcus Werner | 
| USA | University of Illinois Urbana-Champaign | Prof Nicolas Yunes | 
| USA | Virginia Tech | Prof Djordje Minic | 
| Mexico | Instituto de Ciencias Nucleares (Nuclear Science Institute), Universidad Nacional Autónoma de México (ICN-UNAM) | Dr Celia Escamilla-Rivera | 
| Argentina | Universidad Nacional de La Plata | Dr Sebastián Alberto Franchino-Viñas | 
| Canada | York University | Prof Saeed Rastgoo | 
| Brazil | Federal University of Lavras | Dr Iarley Pereira Lobo | 
| Mexico | Universidad Autónoma de Chiapas (UNACH) | Dr Humberto Martínez-Huerta | 
| USA | Georgia Institute of Technology | Prof Adam Nepomuk Otte, Mr Alasdair Gent | 
