Born in September 7, 1977. He has been studying choir conducting at the Kaunas Juozas Gruodis Conservatoire since 1992. In 1996 entered the Lithuanian Academy of Music and Theatre where studied choir conducting with professor Povilas Gylys. Continued studying symphony orchestra and opera conducting with professor Juozas Domarkas. Graduated the Academy in 2006 and gained Master of Music (MA) degree.

The musical society took early notice of him: he has been invited to conduct two major symphony orchestras in Vilnius – the Lithuanian National Symphony and the Lithuanian State Symphony Orchestras. When graduated from the Lithuanian Academy of Music and Theatre in 2006, Dainius Pavilionis was invited to teach in his alma mater at the Department of Conducting. Since 2006 years he is the second conductor of The Guard of Honour Orchestra of the Lithuanian Army. Since 2010 years until 2015 years he was the Principal conductor of the Klaipeda State Musical Theatre. Since 2017 he is the Head of Symphony Conducting Department at Lithuanian Academy of Music and Theatre in Vilnius.

In October of 2006 he became the 3rd prizewinner at the 4th Witold Lutoslawsky International Competition for Young Conductors in Białystok (Poland).
In the year 2007 Dainius Pavilionis in the famous G. Fitelberg 8th International competition for conductors has been granted with the 6th prize.
The conductor gets invitations to conduct of different symphony orchestras in Poland , Portugal, Italy, Belarus.