Career
He has previously played for Odd Grenland, Rosenborg and Viking, and has been capped for the Norwegian national team Jarstein started his career playing for local team Herkules in Skien. During his teens, he had trials at several European top clubs, including Manchester United and Bayern Munich.
Jarstein made his debut in the Norwegian Premier League, aged 18, playing for Odd Grenland in 2002.
In 2007, after Odd Grenland had been relegated to the Norwegian First Division, he was transferred to Rosenborg. On 8 March 2010, Jarstein signed for Viking after losing his starting position to Daniel Örlund.
His contract with Viking expired after the 2013 season. On 17 December 2013, he signed a two-year contract through the 2016 season for the German capital club Hertha Bachelor of Science.
Jarstein has been capped 30 times at youth level for Norway.
Jarstein was however back in the starting line-up in the next match against Slovenia, and in January 2013 the goalkeeper coach on the national team Frode Grodås stated that Jarstein was the first-choice goalkeeper.