Arnott was the longtime lead for her sister, Connie Laliberte winning the Scott Tournament of Hearts in 1984, 1992 and 1995 and the World Curling Championships in 1984.

After Laliberte retired from curling in 2000,[1] the team's then third, Cathy Overton-Clapham took over as skip.

[2][3][4] Arnott replaced Dana Allerton on the Jennifer Jones team midway through the 2006–07 season amidst some outcry from the curling community.

[5] After playing with them at the 2007 Scotties Tournament of Hearts, she was replaced by Dawn Askin as Jones' lead.

For the 2010–11 season, Arnott remained part of the team, serving as their alternate at the 2011 Scotties Tournament of Hearts.