During the first two seasons of the Australia and New Zealand Banking Group Championship, she spent much of her time on the reserves bench. But the departure of Jodi Brown to the Waikato Bay of Plenty Magic after 2009 saw Halpenny given more on-court time in the shooting circle. In 2012 she was shifted out to the goal attack position, and saw enough success there to be names in the New Zealand Accelerant squad.
Halpenny attended Villa Maria College, whose netball team won the South Island secondary schools netball title in 2008. She is also a member of the New Zealand U21 team, and in 2010 was selected for the FastNet Ferns team that won the 2010 World Netball Series in Liverpool. In 2014, Halpenny has had a very strong season with the Waikato Bay of Plenty Magic, resulting in her selection into the Silver Ferns squad for the 2014 Commonwealth Games in Glasgow, Scotland, where she replaces veteran shooter Irene van Dyk who has retired from international netball.
