Career
He represents Stjørdals/Blink. Alseth debuted as referee in Tippeligaen 18 August 1996 in Skeid"s 3-1 victory against Stabæk. He has (pr 28 June 2007 refereed 153 Norwegian football matches.
He has formerly been a Union of European Football Associations official, and is known to have served as a referee in Fédération internationale de football association matches in 2002.