Andersson spent the majority of his playing career with Alets IK, but also briefly represented IS Halma and Laholms FK.

[5][6][7] During Andersson's early managerial years, he managed Alets IK and Laholms FK.

During Andersson's stay at the club, Örgryte suffered from serious financial problems which eventually led their Superettan licence to be revoked.

[10] In 2011, Andersson was appointed as the manager for IFK Norrköping who were making their comeback in Allsvenskan after two seasons in Superettan.

In 2015, he led Norrköping to win the league for the first time in 26 years after defeating defending champions Malmö FF away in the last game.

[12] Under Andersson, Sweden qualified for its first FIFA World Cup in 12 years by eliminating the Netherlands and Italy during the qualification process.

[27] One of his role models is former Swedish handball coach Bengt Johansson, who is from the same neighbourhood (Söndrum) in Halmstad.