He made his debut in round 18 of the 2018 season against Greater Western Sydney at Adelaide Oval.
[2] He joined South Australian National Football League (SANFL) club Sturt, playing as a utility, and was part of their 2016 premiership.
[3] In 2017, he played 21 SANFL games as a key defender,[4] including Port Adelaide's one-point grand final loss.
[2] In 2018, Lienert showed strong SANFL form before having an arthroscope on his right knee to repair his meniscus,[5] sidelining him for two months.
[6] Lienert was delisted by Port Adelaide at the conclusion of the 2021 AFL season, but was subsequently picked up by St Kilda as part of the supplemental selection period (SSP).