During her final season (2015–16) in the Provincial Women's Hockey League, she was bestowed the captaincy of the Stoney Creek Jr. Sabres.

In addition, she was part of the Team Ontario Red roster that won the gold medal at the 2015 Canadian Under-18 Women's Nationals.

[5] In 2013, O'Neill participated with Team Ontario Blue at the 2013 Canadian Under-18 Women's Nationals, securing a silver medal.

O'Neill was named to the Ontario team, which captured the silver medal in women's ice hockey at the 2015 Canada Winter Games.

O'Neill and Jamie Lee Rattray recorded the assists on Loren Gabel's first career goal for the Canadian team in a 2-1 preliminary round loss on November 7, 2018, versus the United States at the 4 Nations Cup.