- 2018 Commonwealth Games Gold Medallist 4x100m Relay
- 2018 Commonwealth Games 4th 50m & 100m Freestyle
- 2018 Pan Pacific Championships Gold Medallist 4x100m Relay
- 2017 WLC Championships Silver Medallist 4x100m Relay
- 18y.o. 100m Freestyle Australian Record Holder
Shayna Jack is a short distance freestyle specialist. In 2017, she broke the Australian 100m freestyle record for 18-years age group, a record previously held by Bronte Campbell. Later in 2017, Shayna competed at the World Championships leading out the Australian 4x100m freestyle relay and securing a silver medal.
2018 has been a standout year for Shayna beginning with the Gold Coast Commonwealth Games. Shayna helped lead the Australian team to two gold medals in the 4x100m and 4x200m freestyle relay. Further to that she placed 4th in the individual 50m and 100m freestyle. Shayna topped of her stellar year with another gold medal at the Pan Pacific Championships in the 4x100m freestyle relay.