1. Relațiile Partidului Comunist Român cu formațiunile politice de stânga din Belgia în perioada 1965-1989 [The relations of the Romanian Communist Party with the left-wing political formations of Belgium during 1965-1989], Doctoral defender: Adrian Cojanu; Experts of the Doctoral Defense Committee: Prof. Dr. Gheorghe Onișoru, „Ștefan cel Mare” University of Suceava, Prof.Dr. Ion Calafeteanu, „Valahia” University of Târgoviște, Senior Researcher Dr. Mioara Anton, „Nicolae Iorga” Institute of History of the Romanian Academy, Defense result: Very good (Magna cum laude); Defense date: 14 September 2017.

2. Politica de conciliatorism anglo-franceză reflectată în presa centrală românească între anii 1930-1939 [Anglo-French Appeasement Policy Reflected in the Romanian Central Press between 1930-1939], Doctoral defender: Andrei Vasiliu, Experts of the Doctoral Defense Committee: Prof. Dr. Habil. Lucian Leuștean, „Al.I. Cuza” University of Iași, Prof.Dr. Ion Calafeteanu, „Valahia” University of Târgoviște, Senior Researcher Bogdan Schipor, „A.D. Xenopol” Institute of History of the Romanian Academy, Iași Branch; Defense result: Good (Cum laude); Defense date: 21 September 2017.
3. Ideology and Power in Norway and Iceland, 1150-1250, Doctoral defender: Costel Coroban, Experts of the Doctoral Defense Committee: Prof.Dr. Jon Vidar Sigurdsson, University of Oslo, Prof. Dr. Ecaterina Lung, University of Bucharest, Prof.Dr. Ioan Opriș, Valahia University of Târgoviște; Defense result: Excellent (Summa cum laude); Defense date: 22 September 2017.
https://www.cambridgescholars.com/ideology-and-power-in-norway-and-iceland-1150-1250

The author of the book „Ideology and Power in Norway and Iceland, 1150-1250” published by Cambridge Scholars Publishing and based on a Ph.D. thesis defended at Valahia University of Târgoviște, Costel Coroban, a member of the Romanian Association for Baltic and Nordic Studies, was awarded on December 11, 2018 the Matei Brâncoveanu Prize for the Best Young Romanian Historian by Alexandrion Foundation.
4. Raportul dintre stat și culte în perioada 1918-1989 reflectat în presa religioasă românească [The relationship between state and religious cults in the period 1918-1989 as reflected in the Romanian religious press], Doctoral defender: Gabriela Grigore (Safta), Experts of the Doctoral Defense Committee: Prof. Dr. Habil. George Enache, `Dunărea de Jos” University of Galați, Prof. Dr. Habil. Sorin Liviu Damean, University of Craiova, Prof. Dr. Ioan Opriș, Valahia University of Târgoviște; Defense result: Good (Cum laude); Defense date: 29 September 2017.

5. Concepte, contribuții și acțiuni ale serviciilor secrete românești în timpul celor două mari conflagrații mondiale [Concepts, contributions and actions of Romanian secret services during the two major world conflagrations], Doctoral defender: Alexandru Iordache, Experts of the Doctoral Defense Committee: Prof.Dr. Gheorghe Onișoru, „Ștefan cel Mare” University of Suceava, Senior Researcher Ottmar Trașcă, „George Barițiu” Institute of History of the Romanian Academy, Cluj-Napoca Branch, Prof. Dr. Ion Calafeteanu, „Valahia” University of Târgoviște, Defense result: Very Good (Magna Cum laude); Defense date: 7 September 2018.

https://www.cetateadescaun.ro/produs/arma-informatiei-soldat-cu-arma-la-picior/
6. Joint Ph.D. thesis (with Prof.Dr. Traian Sandu, Université Sorbonne Nouvelle – Paris 3), Consulats et Consuls Honoraires de Roumanie dans les Grandes Puissances Ouest-Européennes entre les Deux Guerres Mondiales [Honorary Consulates and Consuls of Romania in the Western-European Great Powers between the Two World Wars], Doctoral defender: Elinor Danusia Popescu, Experts of the Doctoral Defense Committee: Prof.Dr. Jean-Marc Delaunay, Université Sorbonne Nouvelle – Paris 3, Assoc.Prof.Dr. Alain Soubigou, Université Paris 1 Panthéon-Sorbonne, Prof.Dr. Ion Calafeteanu, „Valahia” University of Târgoviște, Assoc.Prof.Dr.Habil. Sergiu Mișcoiu, „Babeș-Bolyai” University of Cluj-Napoca, Defense result: Very Good (Magna Cum laude); Defense date: 29 September 2018.

7. „The 12th Panzer Division „Hitlerjugend”, Doctoral defender: Adrian Defta, Experts of the Doctoral Defense Committee: Senior Researcher Ottmar Trașcă, „George Barițiu” Institute of History of the Romanian Academy, Cluj-Napoca Branch, Senior Researcher Bogdan Schipor, „A.D. Xenopol” Institute of History of the Romanian Academy, Iași Branch, Prof. Dr. Ion Calafeteanu, „Valahia” University of Târgoviște, Defense result: Excellent (Summa cum laude); Defense date: 11 October 2019.

https://www.cambridgescholars.com/product/978-1-5275-7090-0
8. „Deportarea romilor din Muntenia în Transnistria în perioada celui de-al Doilea Război Mondial” [The Deportation of the Roma from Muntenia to Transnistria during the Second World War], Doctoral defender: Ioan Valentin Negoi, Experts of the Doctoral Defense Committee: Prof. Dr. Marius Turda, Oxford Brookes University, United Kingdom, Senior Researcher Radu Ioanid, United States Holocaust Memorial Museum, Ambassador of Romania in Israel, Assoc. Prof. Dr. Vladimir Solonari, University of Central Florida, United States, Senior Researcher Ottmar Trașcă, „George Barițiu” Institute of History of the Romanian Academy, Cluj-Napoca Branch, Defense result: Very well (Magna cum laude); Defense date: 8 September 2021.

9. „Constituirea și activitatea Mitropoliei Olteniei, Râmnicului și Severinului (1939-1949)” [The Establishment and Activities of the Metropolis of Oltenia, Râmnic, and Severin (1939-1949)], Doctoral defender: Ion Coconețu; Experts of the Doctoral Defense Committee: Prof. Dr. Habil. Sorin Liviu Damean, University of Craiova, Assoc. Prof. Dr. Sergiu-Grigore Popescu, University of Craiova, Gheorghe Sbârnă, Valahia University of Târgoviște, Defense result: Well (Cum laude); Defense date: 28 September 2021.
10. „Etniile minoritare din Pitești în secolul al XIX-lea” [Minority Ethnicities in Pitești during the 19th Century], Doctoral defender: Mioara Nițu (Burlușanu); Experts of the Doctoral Defense Committee: Prof. Dr. Habil. Ștefan Purici, „Ștefan cel Mare” University of Suceava, Prof. Dr. Habil. Arthur-Viorel Tuluș, „Dunărea de Jos” University of Galați, Assoc. Prof. Dr. Habil. Valer Moga, „1 Decembrie” University of Alba Iulia; Defense result: Very well (Magna cum laude); Defense date: 6 May 2022.
11. „România și Suedia în perioada celui de-al Doilea Război Mondial” [Romania and Sweden during the Second World War], Doctoral defender: Andreea Andreescu (Dahlquist), Experts of the Doctoral Defense Committee: Prof. Dr. Habil. Lucian Leuștean, „Al.I. Cuza” University of Iași, Assoc. Prof. Dr. Adrian Vițalaru, „Al.I. Cuza” University of Iași, Senior Researcher Bogdan Schipor, „A.D. Xenopol” Institute of History of the Romanian Academy, Iași Branch; Defense result: Excellent (Summa cum laude); Defense date: 15 July 2022.

12. „Aprovizionarea Capitalei cu produse agroalimentare și energie în contextul raționalizării și diminuării consumului (1979-1989)” [The Supply of the Capital with Agri-Food Products and Energy in the Context of Rationalization and Reduced Consumption (1979-1989)], Doctoral defender: Mihai Trăilă, Experts of the Doctoral Defense Committee: Senior Researcher I Silviu Moldovan, The Romanian Academy, Iași Branch, Senior Researcher II Mioara Anton, „Nicolae Iorga” Institute of History of the Romanian Academy, Cosmin Budeancă, The Institute for the Investigation of the Crimes of Communism and the Memory of the Romanian Exile, Defence result: Very well (Magna cum laude); Defense date: 3 March 2023.
13. „Crizele din Peninsula Balcanică și oglindirea acestora în documentele militare românești (1908-1914)” [The Crises in the Balkan Peninsula and Their Reflection in Romanian Military Documents (1908-1914)], Doctoral defender: Marian Alin Pîrvu, Experts of the Doctoral Defense Committee: Prof. Dr. Petre Otu (University of Pitești), Assoc. Prof. Dr. Octavian Țîcu (Institute of History, Chișinău), Assoc. Prof. Dr. Ionuț Nistor (Alexandru Ioan Cuza University of Iași), Defence result: Very well (Magna cum laude); Defense date: 20 June 2023.
14. „Protocronismul românesc în perioada regimului Nicolae Ceaușescu (1971-1989)” [Romanian Protochronism during the Nicolae Ceaușescu Regime (1971-1989)], Doctoral defender: Valentin-Cosmin Ghiță, Experts of the Doctoral Defense Committee: Prof. Dr. Hab. Florin Müller (University of Bucharest), Assoc. Prof. Dr. Cosmin Popa (Nicolae Iorga Institute of History, Romanian Academy), Assoc. Prof. Dr. Hab. Cezar Ionuț Stanciu (Valahia University of Târgoviște), Defence result: Very well (Magna cum laude); Defense date: 18 September 2023.
15. „Filatelia – instrument al propagandei comuniste în România (1945-1965)” [Philately – An Instrument of Communist Propaganda in Romania (1945–1965)], Doctoral defender: Octav-Gabriel Negrea, Experts of the Doctoral Defense Committee: Prof. Dr. Gheorghe Onișoru, „Ștefan cel Mare” University of Suceava, Prof. Dr. Habil. Sergiu Musteață, Valahia University of Targoviste, Assoc. Prof. Dr. Habil. Valer Moga, „1 Decembrie” University of Alba Iulia; Defense result: Very well (Magna cum laude); Defense date: 9 July 2024.
16. „Iustin Moisescu: viața, activitatea și contribuția la dezvoltarea învățământului și a bisericii (1910-1986)” [Iustin Moisescu: Life, Work, and Contribution to the Development of Education and the Church (1910–1986)], Doctoral defender: Ion-Gabriel Militaru, Experts of the Doctoral Defense Committee: Prof. Dr. Hab. Ștefan Purici, „Ștefan cel Mare” University of Suceava, Prof. Dr. Hab. Constantin-Valer Necula, „Lucian Blaga” University of Sibiu, Senior Researcher I Silviu Moldovan, The Romanian Academy, Iași Branch, 2 September 2024.