Hedlund's musical career came to be in 1994 when he and a few other musicians formed "Vargatron". The original style was meant to be rooted in black metal but using mostly clean vocals and only a few moments of the traditional grim screaming. After a few line-up changes, the group broke up in 1996, but Hedlund still wanted to work with the songs he wrote for Vargatron and decided to record them by himself. As a result, he revived the act as a solo project and changed its name to "Vintersorg", a project he continues to this day.
Following the departure of ICS Vortex as vocalist, Borknagar was in need of a new singer. Having been friends for some time, Øystein G. Brun asked Hedlund to take the reins for their forthcoming album, Empiricism. Hedlund joined the band in 2001, and is still their vocalist to this day, having now recorded three albums on Century Media Records, as well as their forthcoming album on Indie Recordings and playing live on many occasions.
In 2002, Benny Hägglund, long time friend of Hedlund, and live drummer for Vintersorg, began working on music for a project that would combine melody and aggression into energetic songs. He eventually felt compelled to ask Hedlund for support in this project, thus Fission was born. With Benny playing drums, guitar, and bass, and Hedlund singing and adding his experimental edge to their melodic thrash metal with his unique synths, the band recorded their first full-length, entitled Crater, released in 2004 through Napalm Records.
In the autumn of 2004, Hedlund began writing music in his spare time. The difference though was this music was a reflection of a more personal, emotional side of his mind, and it came out in the form of progressive rock & symphonic rock rather than any of the genres of metal he had become known for. As he continued to write more, this project began to culminate into a full-fledged solo band, which he called Waterfield. Eventually Hedlund had enough material for a full-length album, which he released through Lion Music on 20 January 2006 under the title The Astral Factor, now with the band name Waterclime.
Being long time friends, Øystein G. Brun and Hedlund eventually began to form a musical bond and found a mutual vision. They played with the idea of a band starting in 2000, but when Hedlund joined Borknagar the idea was put on hold for some time. Starting in 2005, the project finally returned though, originally called Ion, and now called Cronian, the band was their joint vision. Music that went beyond standard song structures to create a cinematic feel, while invoking images of grand and epic arctic landscapes was the goal, and the goal came into fruition on 27 March 2006 with the release of Terra, through Century Media Records.