[4] In 1990, after graduating from the university, he was assigned to the city of Sumy (Ukraine), where he led an architectural design team in the office of the chief architect until 1993.

Oleg became a founder and the Chief Architect of Drozdov&Partners, working in Ukraine and abroad.

In Kharkiv, the landmark works of Drozdov&Partners include famous business centers Ave Plaza and Platinum Plaza, Yaske restaurant in Danylevskoho st., Status boutique in Sumska st., Prizma shopping centre in Nauky Ave., Heirloom office and residential building in Chernyshevska st., and Carat residential building in Potebni st.[5] Since 2008, the bureau is a branch of the Department of Fundamentals of Architecture of the Kharkiv National University of Construction and Architecture.

Many citizens did not like the reconstruction of the building in the historical part of Kyiv, which caused outrage and protests.

[14][15][8][16] In 2011, Oleg Drozdov co-authored and reviewed the Spring Semester Studio Workshop on Urban Design for students of the School of Architecture, Columbia University GSAPP.

The prizes were certificates for studying architecture at civil engineering and construction universities and participating in the School’s programs.