About
Dr. Sijbren de Jong is the Senior Analyst for Hybrid Threats at the European Union Institute for Security Studies (EUISS).
Prior to joining the EUISS, he spent nine years at NATO’s Supreme Headquarters Allied Powers Europe (SHAPE), where he provided strategic political-military analysis supporting NATO’s operational planning, contingency planning and senior-level decision-making. During this period, he also served as a member of the team of Political Advisors (POLADs) to the Supreme Allied Commander Europe (SACEUR).
Previously, he worked as a Strategic Analyst at The Hague Centre for Strategic Studies (HCSS), conducting research and advising NATO, EU institutions, the Dutch national government, and multinational companies on geopolitical risks and European security. His areas of expertise include hybrid threats, geo-economics, Russian foreign and security policy, strategic competition, economic coercion, energy security, and critical infrastructure resilience.
Sijbren holds a PhD from KU Leuven, where his research focused on the EU’s external energy relations with Russia and former Soviet States. He has authored or contributed to over 90 publications, including policy reports, academic publications, and analytical commentary. He previously lectured on geo-economics at Leiden University, Campus the Hague.