 In 2005, he moved to Breiðablik for one season, heading back to his former club the following year.He then spent the 2007–08 school year playing in the U.S. Football Development Academy for the IMG Academy squad based in Bradenton, Florida,

Aron made his debut for Fjölnir in the 2008 Úrvalsdeild season.He became a regular in the side the following year, making a total of 37 league appearances for the club and scoring 13 goals in the process.