[3] He conducted research in South-Eastern and Central Europe, focusing on Geto-Dacians, Thracians and Celts.

Dumitru Berciu was governor of National Bank of Romania between 1934 and 1944 and the director of the Romanian Institute of Thracology in Bucharest after 1948.

He is known for his contribution to the development of absolute chronology of prehistoric settlements in the Balkans (Romania and Bulgaria).

In 1921, Dumitru Berciu founded the Drobeta-Turnu Severin City Library and donated over 30,000 volumes.

He financially supported lifting the Drobeta-Turnu Severin Palace of Culture, where he installed his library bearing his name to date.