She was a prominent member of the Australia teams that won gold medals at the 2002 Commonwealth Games and the 2007 and 2011 World Netball Championships.

She was also a member of the Australia teams that won silver medals at the 2003 World Netball Championships and the 2006 and 2010 Commonwealth Games.

Frances was a teacher at a school in Whau Valley and Neville was a manager at the Arthur Yates seed company.

[1][13][14] During the Mobil Superleague era, Cox played for the Australian Institute of Sport in 1995 and for Sydney Cenovis in 1996.

Her team mates at Sydney Swifts included Liz Ellis, Megan Anderson and Susan Pratley.

Following an "internal review", Julie Fitzgerald was replaced as Swifts head coach by Lisa Beehag.

Cox publicly criticized Netball New South Wales for distracting players with the review and even alleged that it was responsible for Swifts losing the 2011 minor semi-final.

[52][53][54][55] In May, Cox played her 250th combined Commonwealth Bank Trophy/ANZ Championship game in Round 10 against New South Wales Swifts.

She was a standout player in the 1996 World Youth Netball Championships grand final in which Australia beat New Zealand.

[13][65][66] She made her senior debut on 11 June 1997, aged 21, in a 65–38 win against South Africa at Challenge Stadium in Perth.

She was also a member of the Australia teams that won silver medals at the 2003 World Netball Championships and the 2006 and 2010 Commonwealth Games.

[72][73][74] On 20 September 2012, during a 2012 Constellation Cup match against New Zealand, Cox made her 100th Test appearance for Australia.

As a result she became only the fourth Australia netball international, after Vicki Wilson, Sharelle McMahon and Liz Ellis, to reach the century mark.

She made her broadcast debut, when together with Sharelle McMahon, Liz Ellis and Kelli Underwood, she was part of the Fox Sports (Australia) commentary team that covered the 2015 ANZ Championship season.