Her trainer is Sade-Maria Pirttinen who previously coached karate champion Anssi Kaltevo.
Competing in the Women's +68 kg kumite, Kuusisto won the silver medal in the 2012 World Cup in Athens, as well as the Premier League bronze medals in Frankfurt, Germany, Istanbul, Turkey and Salzburg, Austria.
In addition, she also won silver medals in several matches in the Premier League Competitions in Paris.
In 2014, Kuusisto won the general series of European Championship bronze in the +68 kg category.
In the 2011 Youth World Championships in Malaysia, Kuusisto won the 5th place from 18–20 years in the +60 kg category.