[2][3] Berg was born in Hamar, and began playing the piano at a very early age; at only 7 years old he was featured on national TV, performing his own compositions.

[4] At the time he started the trio Listen!, together with Bendik Giske (saxophone) and Daniel Herskedal (tuba).

[5] Berg started working as a professional musician in 2003, and toured with his own trio Listen in Scandinavia, Spain, Syria, Cuba, Belgium, France and Hungary.

He has released three albums with his own bands, and also plays within the jazz band Green Serene, Kåre Kolve Quartet and Trondheim Jazz Orchestra, and together with the saxophonist Marius Neset performing the Commissioned work at Moldejazz in 2012.

Berg has also written music for the Spellemannprisen-nominated Trondheim Soloists, Cikada String Quartet, Quintus and Seeb.