Senior researchers, nine PhD holders, four MAs, thirteen altogether, is the team, not hired on a permanent basis. Dissertation writers and students are also volunteering in the ISIS activity.



Ambassador Valeri Ratchev


Valeri Ratchev

§ Ambassador Extraordinary and Plenipotentiary of the Republic of Bulgaria to the Republic of Iraq and Councillor to the Minister of Foreign Affairs of Bulgaria Valeri R. Ratchev has presented his Letters of Credence as Ambassador Extraordinary and Plenipotentiary of the Republic of Bulgaria to the Republic of Iraq on March 22, 2006.

§ This is the first diplomatic post of Valeri Ratchev. At this rank he arrived after 30 years military career from the position of Deputy Commandant of ‘G. S. Rakovski’ Defense and Staff College and Dean of National Security and Defense Faculty. He served also as a Deputy Director for Defence Planning at the Ministry of Defence, Deputy Director of the National Security Studies Centre, editor-in-chief of the MoD’ professional bi-monthly Military Journal and on a variety of positions as a commanding and staff officer in the Bulgarian Armed Forces. For his service he has been decorated with Medal for Distinguished Military Service (II and III classes) and many other signs as well as with a personal combat arm.

§ In the period 2009-2013 he served as Chief of the Political Cabinet of the Minister of Foreign Affairs of the Republic of Bulgaria.

§ Since 2013 he is Associate of the Center for Management of Security and Defense of the Bulgarian Academy of Sciences.

§ He has earned a B.S. and M. A. in military art in the Artillery Academy in Shoumen, Bulgaria and Artilery College in Sanct Peterburg (Leninigrad) and obtained qualification in international relations and security from the U.S.-German George C. Marshall European Center for Security Studies (Garmish-Partenkirchen), the Institute for International Relations in Rome (Italy), and the University of Michigan (Ann Arbor, USA).

§ His area of expertise includes international and national security issues, defense transformation and force planning, civil-military relations and crisis management. On those issues he has published and lectured in Bulgaria, Europe and USA.

§ Valeri Ratchev is Senior Research Associate of ISIS. His affiliation with the Institute is since 1995.




Velko Attanassoff


Velko Attanassoff

§ Velko Attanassoff, PhD is holding an honorary dual master degree - Master of Arts in National Security Studies (Middle East Regional Studies) and Master of Science in Defense Analysis (Low Intensity Conflict) from the Naval Postgraduate School (NPS) in Monterey, CA, USA.

§ Since 2012 he is Ph. D in International Relations of Sofia University “St. Kliment Ohridsky”.

§ He is  Senior Research Associate with the Institute for Security and International Studies (ISIS) in Sofia, Bulgaria and also lectured “Contemporary Islam” in the International Security M. A. Program of the International Relations Department of the Law School at the Sofia University “St. Kliment Ohridsky”.

§ His research interests are in the field of Islamic activism and collective action (i.e., revolutions, rebellions, and social movements) in Muslim societies.

§ He worked on EU Multipart project and the Sofia University project “Post Conflict Rehabilitation – the building of security partnership and the EU Role”, and also on his PhD thesis, focused on religious activism in the Balkans and the consequences for the regional security. His important publications are: “Bosnia and Herzegovina—Islamic Revival, International Advocacy Networks and Islamic Terrorism” (Strategic Insights, Volume IV, Issue 5 (May 2005); “The Case of Afghanistan” in Cultural Awareness – New Educational Standards, New Security (Sofia University Press, 2008).

§ Velko Attanassoff served as the Deputy Head of the Embassy of the Republic of Bulgaria in Beirut, Lebanon from 2011 till 2016.




Todor Tagarev


Todor Tagarev

§     Affiliation:

Senior Research Associate, Institute for Security and International Studies since 1995.

Director Programs, Centre for National Security and Defence Research – Bulgarian Academy of Sciences,

Managing Editor, Information & Security: An International Journal,, Director, Center for Management of ecurity and Defense, Bulgarian Academy of Sciences.

§     Minister of Defense in the 88th Caretaker Governmemt of Bulgaria, 13

§     March – 29 May, 2013.

§     Education :

M.Sc. in electrical engineering (1982), Air Force Academy, Bulgaria

Ph.D. (1989), N.E. Zhukovsky Air Force Engineering Academy, Moscow

Airpower studies (1994), U.S. Air Command and Staff College, Maxwell Air Force Base, Alabama

§     Career:

Bulgarian Academy of Sciences: Senior Researcher, current; 2002 – 2005, 1995-1998

“G.S. Rakovski” Defence and Staff College: Chair, Defence Management Department; 2005 – 2008

Ministry of Defence: Director, Armaments Policy (May – Sep 2001); Director, Defence Planning (1998 – Apr 2001)

Air Force: field assignments (1982-1986), Assistant Professor - Air Force Academy (1989-1992), Joint assignment (1992-1994)

§     Main field of specialization:

Defence policy and planning, security sector reform (primarily from organizational management perspective, with focus on planning, resource management, and process improvement)

§     Other fields:

Security and defence R&T management

Security and defence economics, defence industrial base

Critical Infrastructure Protection

§     Current research interest:

Scenario-based, capability-oriented planning for  the defence and the security sector (planning under uncertainty,  complexity)Defence transformation in partner countries (with experience in Bulgaria, the Western Balkans, Ukraine, Moldova, Georgia,  Armenia, Azerbaijan, and Kazakhstan)




Yanko Yordanov


Yanko Yordanov is an Associate of ISIS since 2009.

§ He is a Ph.D. student at the International Law and International Relations Department of the Faculty of Law at Sofia University “St. Kliment Ohridski”. He holds a Bachelor degree in International Relations and a Master degree in International Security from the same faculty.

§ He has completed the Basic Course in Diplomacy at the Diplomatic Institute to the Bulgarian Ministry of Foreign Affairs and the Professional Course in Foreign Policy of India at the Foreign Service Institute to the Ministry of External Affairs of the Government of India.

§ Since 2009 he has been working for the UN and Cooperation for Development Directorate of the Ministry of Foreign Affairs of the Republic of Bulgaria.

§ His research interests are in the fields of China’s foreign policy, EU-China relations, China-India relations, UN peacekeeping etc.

§ His important publications are: 1) „Bosnia and Herzegovina in Chinese Foreign Policy”, in “Democracy and Security in Southeastern Europe” Magazine, Volume 2, Issue 8/9, Sarajevo, 2011; 2) „Multipolarity or Multilateral Cooperation – the New Emerging Powers` Dilemma”,   International Relations Magazine, n 2, Sofia, 2012,; 3) “China’s energy policy and its external dimensions”, in Ph.D. Students’ Forum: Dialogues in the Field of International Relations, Security, Human Rights and EU Studies, University Research Complex for the Humanities “Alma Mater”, University Press “St. Kliment Ohridski”, Sofia, 2013. 4) He is among the researchers working on Sofia University’s Research Complex for the Humanities “Alma Mater” project under the name of “Centers of Power in International Relations, Their Interaction and the Polarity Issue in the XXI Century: Implications for the Security Policy of EU and Bulgaria”.