Tasos Chatzivasileiou was born in Serres, in 1981.
He is an Assistant Professor of International Relations and the EU at the Hellenic American University (New Hampshire, USA).
In 2020, he was awarded a PhD in Political Science and History from Panteion University. He has been working continuously since his student years. He has worked as a Special Advisor at the Greek Ministry of Foreign Affairs and the Hellenic Parliament, and as a Research Fellow at the Ministry of Foreign Affairs of Cyprus. He has participated in various research projects in Athens, Brussels, Strasbourg, Istanbul and Nicosia. Moreover, he has taught as a visiting researcher at Ankara University and Panteion University. In the private sector, he has worked at HRP International as an International Business Development Consultant, specializing in the utilization of European programs and the implementation of business synergies in the Greek and international markets. In addition, he has participated in the writing of books related to International Relations and History.
In the national elections of July 2019, as well as in the national elections of May and June 2023, he was elected Member of Parliament for Serres with the Nea Demokratia party. He served as Secretary of the parliamentary Committee on National Defense and Foreign Affairs. Moreover, he is a Member of the Parliamentary Assembly of the Council of Europe. In September 2023, following a proposal by the Nea Demokratia parliamentary group and Prime Minister Kyriakos Mitsotakis, he was elected 1st Vice-Chairman of the parliamentary Committee on European Affairs. In December 2019, the Greek Prime Minister and President of Nea Demokratia Kyriakos Mitsotakis appointed him as International Secretary of the Nea Demokratia party. He speaks English, French, Turkish and Spanish.