For her performance in 3 Acts of Murder she won the 2009 Australian Film Institute Award for Best Guest or Supporting Actress in Television Drama.
Feature films include I Met a Girl, The Flood (both 2020), True History of the Kelly Gang (2019), Sweet Country (2017), Teenage Kicks (2016), Sleeping Beauty (2011), The Boys are Back and Prime Mover (both 2009).
[4][5] Recent television roles include The Gloaming for Stan, Harrow, Wentworth (season 7), the US TV series Reckoning, Rake, Secret City for Foxtel and Glitch for the ABC.
On 9 September 2024, Finsterer was named as part of the extended cast for Stan Australia series Thou Shalt Not Steal.
Finsterer is also an author - her most recent publication being Radical Rock and Roll Resilience (2020) - a personal story of overcoming adversity, combined with strategies of how to live an empowered life.