Background
Neilsen was born on 24 July 1991 in Southport, Queensland.
Neilsen was born on 24 July 1991 in Southport, Queensland.
She was selected to represent Australia at the 2012 Summer Olympics in the 4×200-metre freestyle relay event. Neilsen gained a scholarship with the Queensland Academy of Sport. She also competed in the 4×200-metre freestyle relay event where she finished second.
She competed in the 4×200-metre freestyle event at the Dubai hosted 2010 World Short Course Championships.
Her team came in second with a time of 7:37.57. At the Samoa-hosted 2010 Oceania Championships, she earned one silver medal and three gold medals.
She competed in the 2011 Australian Championships in the 200-metre freestyle where she finished third. She competed in the 2011 World Championships.
At the 2012 Adelaide National Championships in the 200-metre freestyle event, she finished fifth, which earned her a place in the 4×200-metre freestyle relay team
She was selected to represent Australia at the 2012 Summer Olympics in swimming in the 4×200-metre freestyle event. The Games were her first.
