Una is the leader of the Reykjavík Chamber Orchestra and the 3rd. concertmaster of the ISO. She has premiered a large number of compositions.

Among her solo concertos with the ISO are Beethoven, Shostakovich nr. 1, Philip Glass nr. 1, Atli Heimir Sveinsson, Páll Ragnar Pálsson and Þuríður Jónsdóttir. Una has worked closely with Björk, Jóhann Jóhannsson and Atli Heimir Sveinsson. She has worked with Ensemble Modern, Ensemble Musikfabrik and Bedroom Community.

Una has written for film and theater and her work includes Opacity (2014), Lullaby (2016), Gátt (2017), Missir and El Desnudo (2018). Her album Umleikis with her solo pieces for violin was out in 2014 and her new album LAST SONG is out on Sono Luminus July 23rd 2021. She is a founding member of Siggi String Quartet and her work Opacity is featured on the quartet’s debut album South of the Circle, on Sono Luminus 2019.

Siggi String Quartet was awarded the Icelandic Music Awards in 2019.