Records show the Kiwi enjoyed success at Landor in 2007 and 2008, riding several winners on the amateur circuit.
From there, Tierney headed back home across the ditch, where she took out her own training ticket and prepared eight winners, according to Racing and Sports' statistics, between 2015 and 2022.
While her training tenure in New Zealand was relatively short, Tierney did have a number of starters in Group races.
She eventually returned to Australia and arrived at the Caloundra track before landing a gig with the Stuart Kendrick stable as a trackwork rider a couple of years ago.
“My biggest downfall over the years has been being not so confident in myself,” she reveals.
“To be honest, being a jockey has helped me a lot with that side of it.