John Breen is a Geopolitical Risk Advisor at Sibylline. Based in Dublin, Ireland, John helps organisations strengthen their resilience, enabling them to manage geopolitical risks and opportunities with confidence and insight. He works with a diverse range of clients – including blue-chip companies, multilateral institutions, and European governments – leveraging his extensive cross-sector expertise to deliver practical solutions for navigating geopolitical uncertainty.

John has over ten years of experience in geopolitical risk and policy advisory, having guided businesses, governments, and NGOs on political, socio-economic, and security challenges across Asia, Europe, and the Middle East. Career highlights include advising Ireland’s mission to the United Nations on peace and security affairs, consulting government officials and businesses in London and Southeast Asia on Indo-Pacific geopolitics, and collaborating with civil society and the UN on human rights and self-determination.

John earned a master’s in international relations from Queen Mary University of London, graduating with distinction. He also completed a professional diploma in data analysis at University College Dublin (UCD) and participates in the Good Judgment Open.