Siti made her debut as a full-time actress after attending The Necessary Stage's Theatre for Youth Ensemble programme in 2003. She has since worked with a wide range of theatre companies and TV production houses, both locally and internationally.
She won the Best Actress Award twice at The Straits Times Life! Theatre Awards for her performances in Model Citizens (2010) and Off Centre (2015). She has also been nominated for Best Supporting Actress at Pesta Perdana (2019) and Best Comedy Performance at the Asian Television Awards (2017). She was awarded the Young Artist Award by the National Arts Council in 2014.