[2] She has played in Finnish clubs FC Kontu, Turun Pyrkivä, Malmin Palloseura and HJK Helsinki.
Miettinen also played for the Boston Renegades[3] and captained at Franklin Pierce College, where she managed to muster 122 goals and 65 assists, an NCAA record with 309 points.
After finishing her playing career, Miettinen became the head coach of FC Kontu and then PK-35 Vantaa.
After the 2009 season, Miettinen was named as the head coach of Sky Blue FC,[1] but she was dismissed on 19 July 2010.
Miettinen also guided the club to the knockout phase of the UEFA Women's Champions League three times.