Bjarmann played for Lillestrøm SK throughout his professional career, except for a short loan period in Austrian football when he teamed up alongside compatriot Geir Frigård.
His 306 Norwegian Premier League matches is a Lillestrøm club record; so are his 564 games in all competitions.
Bjarmann retired after the 2003 season, but made some appearances in the lower leagues, mostly for the B and C teams of Lillestrøm SK.
[3] Off the field he worked for some time as a commentator in the Norwegian Broadcasting Corporation football show, "4-4-2".
He stayed with FC Lyn until September 2008, before being appointed Director of Football at Lillestrøm SK.