[1] She won a bronze medal at the 2007 Track Cycling World Junior Championships in the Keirin event.

In 2011, Sullivan had top-10 finishes in the sprint and keirin events at the World Cup in Cali, Colombia.

In 2012, Sullivan captured double gold at the Pan American Championships in Mar del Plata, Argentina.

She also competed at the 2010 Commonwealth Games in Delhi, India and captured bronze in the team sprint event with Tara Whitten.

[3] In Rio, Kate O'Brien and Sullivan were eliminated in the repechage of the women's keirin.