Her television credits include roles on Fringe, The L Word, Kyle XY, and a recurring role on Intelligence. In 2008, Liebert was cast as a lead in Sook-Yin Lee's film debut, Year of the Carnivore, the Cuba Gooding Jr. feature Hardwired as well as Blaine Thurier's A Gun to the Head. She also subsequently appeared in the second of three Molson Canadian commercials titled "It's an unwritten code in Canada…". In 2012, Liebert's recent role as Betty, in the wartime miniseries Bomb Girls, received much critical acclaim including a Canadian Screen Award in 2015. Liebert identifies as queer and has discussed using her work to support queer representation.
