Sione Tekiteki is a Pacific international relations and legal scholar, practitioner and former regional diplomat with more than two decades of experience in Pacific regionalism, foreign policy, international law and regional security.

Sione previously served at the Pacific Islands Forum Secretariat, working across regional policy, international engagement and Pacific collective action. His professional experience also includes serving as the Clerk of the Parliament of Tonga and advisory roles to the Government of Tonga on security, governance and strategic policy. He has worked extensively with Pacific governments, regional organisations and development partners across the region.

Sione is currently a Senior Lecturer in Law and Pacific Lead at Auckland University of Technology (AUT), while remaining actively engaged in Pacific regionalism through advisory work with Pacific governments and participation in regional processes and meetings. His teaching and research focus on foreign policy and the law, international and regional organisations, Pacific regionalism, and the changing international order. His research and commentary examine Pacific regionalism, regional security, international law and institutions, and the exercise of small-state agency amid growing geopolitical competition. His work brings a Pacific practitioner perspective to wider debates about Indo-Pacific security and international order, particularly how Pacific states can protect sovereign decision-making while strengthening their individual and collective influence.