During the 2011–12 Canada women's national ice hockey team season, she was a member of the Canadian National Under 18 team that participated in a three-game series vs. the US in August 2011. In addition, she was named the team captain. She was part of the gold medal winning Team Ontario Red squad at the 2011 Canadian National Women's Under-18 Championships In the second game of the 2012 IIHF World Women's U18 Championship (contested on January 1, 2012), Erin Ambrose earned two points in a 6–0 shutout of Germany.