Hassett represented New Zealand at the 2011 and 2015 FIFA Women's World Cup as well as the 2012 and 2016 Summer Olympics.

Born in the Auckland suburb of Titirangi, Hassett began playing football at the age of four with her brothers.

[4] She was captain of Avondale College First XI Girls Football team in 2008 and led them to third place at the National Schools Tournament.

[8] After signing with SV Werder Bremen in the German Frauen-Bundesliga for the 2015–16 season,[11] Hassett made eight starts in her ten appearances for the club.

[8] After winning the championship, Ajax secured a spot in the 2017–18 UEFA Women's Champions League, a first for the club.

[15] In July 2022, after 14 years playing abroad, Hassett returned to her homeland, signing with New Zealand's only professional women's club Wellington Phoenix.

[17] Hassett was a member of the New Zealand squad in the 2008 FIFA U-20 Women's World Cup[18] playing all three group games; a 3–2 loss to Nigeria,[19] a 4–3 win over hosts Chile[20] and a 1–1 draw with England.

[21] In 2010, she played all three group games in the 2010 FIFA U-20 Women's World Cup[22] Hassett made her senior Football Ferns debut in a 1–0 win over Argentina on 16 June 2008.

[25] In 2012, she represented her country at the London Olympics, helping the Football Ferns become the first New Zealand team to advance to the second round in a major FIFA tournament.