Dejan Dacic enrolled in the School for Musical Talents in Ćuprija at the age of seven. As a recipient of the Archduke Johann Scholarship, he studied violin at the Music Academy in Graz in the class of Christos Polyzoides where he graduated in 1992. He studied conducting not only in the USA and New Zealand but also under Karl Ernst Hoffmann. From 1984 to 1987, he was a member of the Austrian Youth Chamber Orchestra and a concertmaster of the Graz Symphony Orchestra.

Since 1989, he has become a member of the Graz Philharmonic Orchestra. Since 1993, he has been a deputy leader of other violins. From 1998 to 2001, he conducted the Fidelis Youth Chamber Orchestra. From 2001 to 2007, he was a conductor and the artistic director of the Graz University Orchestra. Since 1995, Dačić has become the music director of the Rondo Grazioso Summer Music Course at the Neudorf castle near Wildon. In 2003, he founded the Graz Chamber Orchestra and performed with it in Austria, Greece and Slovenia. He has led the performance of the Marriage of Figaro in the production of the Next Liberty Youth Theatre.

In March 2008, he made his debut as a conductor at the Graz Opera with Darrel Toulon’s Anthony and Cleopatra to the music of Dmitri Shostakovich. In the summer of the same year, he was the artistic director of the Gyor Philharmonic Orchestra at the annual European concert that was broadcast on television throughout the world. As a conductor and violinist, he has performed in concert tours in Spain, Finland, Hungary, Italy, France, Germany, South Korea and New Zealand. He has participated in numerous television programs and various recording productions for audio carriers.