After a career that stared in Diving, Jayden has made the move to Trampoline, based at Highflyers Trampoline and Gymnastics Academy in WA, coached by Aaron Wake.
Jayden won bronze at the 2012 Indo Pacific Championships for her Trampoline performance in her first year as a Junior, and in the same year won bronze on both Double Mini Trampoline and Synchronised Trampoline.
In 2014 Jayden achieved bronze in both Trampoline and Double Mini Trampoline, and gold in Synchronised Trampoline at the Australian Gymnastics Championships.
Cooney travelled to Florida later in 2014 for the Trampoline World Championships, finishing in 15th for the Double Mini Trampoline.
Partnered with Eva Kierath, Cooney finished fourth in the Synchronised Trampoline in 2015.