In early July 2009, she participated in the 200 metres at the World University Games, successfully reaching the semi-finals. She finished her semi-final with a time of 24.53 seconds, leaving her in fifth place, which meant she did not reach the final. Cuddihy did not participate in the 2009 World Championships in Athletics, as she had taken time out to focus on her academic studies. Following a hiatus, Cuddihy returned to athletics at the Melbourne Track Classic in March 2010, where she placed third in the 400 metres with a time of 52.95 seconds. In early July 2010, Cuddihy won the Irish National Championships in the 400 metres with a time of 52.76 seconds. At the 2010 European Athletics Championships in Barcelona, Spain, Cuddihy made the semi-finals, but was unable to make the final after finishing fourth in her semi-final and missing a fastest loser position. She was also a member of the Irish 4 x 400 metres relay team alongside Marian Andrews, Brona Furlong, and Michelle Carey which failed to progress from the heats after finishing sixth.