Representing Finland she has won two Olympic bronze medals, one at the 2010 Winter Olympics and one at the 2018 Winter Olympics; she also competed with the Finnish national team in the tournament at the 2014 Winter Olympics where Finland placed fifth. Hiirikoski has competed in eleven IIHF World Women's Championships and she won a silver medal at the 2018 Championship and bronze medals at the tournaments in 2004, 2008, 2009, 2015, and 2017.