In 2010, his Magnificat was commissioned by the Nidaros Cathedral Girls´ Choir. The premiere got an overwhelming feedback leading to several new commissions. A recording was released by 2L in 2014 and the album has received excellent reviews in Gramophone, Choir & Organ and other classical magazines.
In 2014 his Requiem was premiered by the Nidaros Cathedral Boys' Choir. The work had its New York City premiere at Carnegie Hall in January 2017.
Kim was the Composer-in-residence for the Denver-based choral ensemble Kantorei and Artistic Director Joel Rinsema in their 2015/16 Season, which will end with Kim's second CD album to be released in January 2018 by Naxos. In 2016 The Wound in the Water was premiered by Conspirare. In 2017 the new Holy Spirit Mass was premiered. Arnesen is a house composer at Boosey & Hawkes from August 2017.