Career
She had previously played for Þór/KA in Iceland and Kopparbergs/Göteborg Football Club in Sweden. In 2011 Arna Sif became captain of Þór/KA and switched from playing in midfield to central defence. After guiding the club to their first ever Úrvalsdeild title in 2012, she was named Akureyri"s Athlete of the Year.
Arna Sif joined Swedish Damallsvenskan club Kopparbergs/Göteborg Football Club in February 2015, after impressing in a short trial period.
At 22-years-old she had played for Þór/KA for the previous eight seasons. In November 2015, she returned to play in the Úrvalsdeild when she sign a contract with Valur.
Arna Sif made her senior debut for the Iceland national team in August 2014, playing in a 1–0 World Cup qualifying defeat by Denmark at Laugardalsvöllur in Reykjavík.
