She took two silver medals at the UCI Juniors Track World Championships: one in the team pursuit in 2010 and another in the individual pursuit in 2011. Williams joined the team in 2013. She competed at the 2014 Commonwealth Games. In 2016, she was part of the New Zealand team pursuit squads that finished fourth at the UCI Track Cycling World Championships and the 2016 Summer Olympics. In February 2017 it was announced that Williams would join for the 2017 season. She won New Zealand's second ever medal in the women's road race at a Commonwealth Games, a silver medal in 2018, after Susy Pryde at the 1998 Commonwealth Games.