Hamrén coached Norwegian team
Rosenborg BK to league championship in his first full season with the club. His previous job was as manager of the
Danish Superliga side
Aalborg BK, where he guided the team to a 5th-place finish in the
2005–06 season, a 3rd place in the
2006–07 season, and to the championship in the
2007–08 season. Following heavy speculation in Swedish and Norwegian media, it was confirmed on 4 November 2009 that Hamrén would assume part-time responsibility of the
Sweden national football team while also managing Rosenborg. This happened until Rosenborg relieved him from his contract on 1 September 2010. After heavy discussions with RBK (Erik Hoftun, Terje Svendsen, Nils Skutle, Lars Aune), Hamren eventually was confirmed as manager for the Sweden national team. On 16 October 2012, he presided over a game where the national team finished with a
4–4 draw from 4–0 down in
Berlin against
Germany in
2014 FIFA World Cup qualification – UEFA Group C. Hamrén qualified Sweden for
Euro 2012 and
Euro 2016, before stepping down as the manager of Sweden. On 8 August 2018, Hamrén was named as manager of the
Iceland national football team, where he succeeded
Heimir Hallgrímsson. On 15 November 2020, following Iceland's failure to qualify for
Euro 2020 and their poor performance in the
2020–21 UEFA Nations League A that led to their relegation for the
succeeding season, Hamren announced that he would resign as manager after Iceland's last match of the year. On 15 September 2022 he returned to
AaB in the
Danish Superliga, when
Lars Friis was sacked. On 20 March 2023, Hamrén was sacked after a poor run of results with AaB in last place in the Superliga. ==Personal life==