Having studied classical music since he was five years old, Viktor Arnason began playing in different bands when he was still a teenager. His first success came with the band called Búdrýgindi, selected as the 2002 winner of the national competition Battle Of the Bands. As part of Hjaltalín, which the musician joined in 2006, Viktor Arnason released three full albums, a movie soundtrack and a concert album with the Iceland Symphony Orchestra, which included performances of his popular orchestra compositions. Arnason was a member of several bands, which had won numerous prizes at the Icelandic Music Awards.

Having earned his diplomas in musical composition and violin performance, Viktor is the conductor/violin player and artistic co-director of the SKARK ensemble, and he has conducted such orchestras as the Berlin Music Ensemble, LPR ensemble in New York, Australian Chamber Orchestra, and Budapest Cinematic Orchestra.

Since 2010, Viktor has been playing the string instruments and producing orchestra arrangements for such musicials as Jóhann Jóhannsson, Ólafur Arnalds, Nils Frahm, Hildur Guðnadóttir, Agent Fresco, Gluteus Maximus, Uni Stefson, Árstíðir, Sandra Kolstad, East of My Youth, and Hanna Mia and The Northern Taylor Squad.