[1] Playing in the Randwick Netball Association competition, Cusack was selected in the NSW 17/U team in 1982.

In 1983, she was selected as goal attack for the New South Wales team at the U19 Australian Netball Championships.

[1] Cusack debuted for the Australian Diamonds against the Silver Ferns on 26 April 1989 in Auckland, New Zealand.

[2] She was a member of the Australian Diamonds that competed at the 1990 Commonwealth Games as a demonstration sport.

[1] Cusack played 52 times for the Australian Diamonds and won gold medals at the 1995 Netball World Championship and the 1998 Commonwealth Games.