Nixon began curling competitively at fourteen. Her first notable success was being a Gold Medal winning skip at the Saskatchewan Winter Games in 1994, which she followed up with a 10th place finish at the 1995 Canada Games. As a third for Shannon Kleibrink, Nixon shared in several successes, including winning the Canada Cup in 2005 and 2009 and representing Canada and won a bronze medal in Turin for the 2006 Winter Olympic Games. Nixon captured her first Scotties Tournament of Hearts title in 2012 as an alternative for the Heather Nedohin team after previous appearances in 2004, 2008, and 2011 with Kleibrink.