They moved to Kuortane, Finland, to attend high school, where they trained with the national team until graduation.

After leaving Kuortane in 2004, Oivanen signed a contract with the Raision Loimu team, which plays in the Finland volleyball league.

His brother signed with Rovaniemen Santasport, marking the first time the two had separated since they started playing volleyball years earlier.

[1] Oivanen's first game as a member of the Finland men's national volleyball team was against Germany in the summer of 2005.

During the 2007 Men's European Volleyball Championship, the Finland national team won fourth place.