She played on the Symetra Tour in 2017, winning three times, finishing second on the money list and won the Rookie of the Year award.

In June 2019, Green won her first major (and first LPGA Tour event), the Women's PGA Championship, by one stroke over defending champion Park Sung-hyun.

[2] Before her maiden victory on the LPGA Tour, Green's best finish was third place at the 2018 ISPS Handa Women's Australian Open.

[5] On 1 September 2019, Green won her second LPGA Tour event at the Cambia Portland Classic,[6] while in December 2019 she was awarded the Greg Norman Medal.

[8] On 4–7 August 2021, Green represented Australia in women's individual golf event at the 2020 Olympic Games in Tokyo together with Minjee Lee.