KUNGSÄNGEN, SWEDEN – November 7, 2025 – The NATO Energy Security Centre of Excellence (ENSEC COE) successfully concluded the five-day Tabletop Exercise Coherent Resilience 2025 Arctic (TTX CORE 25-A), held at the Gällöfsta Conference Center.
Co-organized by the ENSEC COE, the European Commission Joint Research Centre (JRC), the US Naval Postgraduate School (NPS) Energy Academic Group (EAG), and the Ted Stevens Center for Arctic Security Studies (TSC), the exercise brought together over 100 civil and military experts from 14 nations and more than 50 institutions and organizations.
TTX CORE 25-A was specifically designed to stress-test national and collective response mechanisms against a complex, scenario-based hybrid threat campaign targeting critical energy infrastructure (CEI) in the increasingly strategic Arctic region.
Exercise focused on addressing critical challenges posed by hybrid threats in the Arctic region, with particular emphasis on the resilience of energy operations, supply chains and critical infrastructure in the maritime domain.
It convened a wide spectrum of stakeholders from across the Euro-Atlantic community: national institutions, energy system operators, industry, civil emergency planners, armed forces and coast guard representatives, NATO and EU/JEF partners.
“The takeaways identified during the exercise concern, among others: preparedness for energy infrastructure protection in harsh environment; how to ensure effective crisis response and emergency preparedness; how to communicate the threats in the most effective way, and; how to best deal with maritime law challenges.” – said Dr. Habil. Piotr Szymański, Director of Directorate C – Energy, Mobility and Climate, EU JRC.
The exercise featured a three-part structure—starting with academic seminars on Arctic security, progressing to intensive syndicate work where multi-disciplinary groups stress-tested response plans against a coordinated scenario, and culminating in a Distinguished Visitors’ Day for high-level policy dialogue.
Next Steps
The official Final Exercise Report (FER) detailing the full lessons learned and recommendations will be produced jointly by the co-organizers and is anticipated for publication in Spring 2026. These findings will directly inform NATO’s doctrinal development, education and training efforts, and policy recommendations on energy security and critical infrastructure resilience.
