ENSREG benefits from the engagement of observer members in its activities:
Several non-EU countries:
- Norway,
- Switzerland,
- Türkiye,
- Ukraine,
- the United Kingdom,
international organisations:
- the Council of the European Union,
- the International Atomic Energy Agency (IAEA),
- the OECD Nuclear Energy Agency (NEA),
- the Western European Nuclear Regulators Association (WENRA),
- the Heads of the European Radiological Protection Competent Authorities Association (HERCA).