Career
Thorbjørnsen debuted in Tippeligaen on 11 April 2005 against Molde where he kept a clean sheet. During his years in Brann Thorbjørnsen was the second-choice goalkeeper, usually playing in the first rounds of the Norwegian football cup and whenever Håkon Opdal was injured. He was loaned out to Sandefjord in 2008, but experienced some cardiac problems.
In 2009, he was only the third choice goalkeeper behind Håkon Opdal and Kenneth Udjus, and expressed a desire to leave Brann.
On 21 November 2009 he signed for Løv-Ham, where he played for two seasons before he ahead of the 2012-season was one of the first players to sign for the new second division club from Bergen, Fyllingsdalen.