Hannah Buckling first debuted for the Aussie Stingers in 2011 at the Canada Cup where she scored a goal in the final to help Australia win Gold. That same year Buckling was also named Water Polo Australia’s Junior Female Player of the Year.

In 2013, the NSW Institute of Sport (NSWIS) scholarship holder travelled to the USA where she spent a season playing for the University of Southern California Trojans. In her single season, she netted 40 goals for the Trojans, earning All-American honours and helping the team win the NCAA Championship. Buckling then headed to the 2013 FINA World Championship in Barcelona where she and her Stingers teammates won silver.

Buckling made her Olympic debut in Rio where Australia finished in 6th place. In 2019, the Stingers travelled to South Korea for the 2019 FINA World Championships, with Buckling scoring two goals to help take down Hungary and earn a bronze medal.