Sossi Tatikyan has a Diploma from Yerevan State University, Master of Public Administration from Harvard Kennedy School of Government and Executive Master of Business Administration from ESCP Europe Business School. She has had two interrelated careers.

She has worked in the Armenian Foreign Ministry for over a decade, mostly dealing with Armenia's relations with NATO, International Atomic Energy Agency, international human rights bodies and Iran. Sossi has worked with the OSCE, UN and EU Missions in Europe, Asia and Africa, providing political and strategic advice in the area of good governance and security policies, and designing and managing technical assistance programmes and projects in reforming security and rule of law institutions. She also served as Project Coordinator of UNDP Modern Parliament and Freedom House’ Advancing Democratic Culture projects in Armenia. Currently, she is providing advisory services to public, non-profit and private organizations both in Armenia and globally. She has a number of publications, such as on Euro-Atlantic integration and energy security issues published by NATO Defense College.