In animation, Tom has voiced Amy Wong in Futurama, Dana Tan in Batman Beyond, Jinx and Gizmo in Teen Titans and Teen Titans Go!, Minh and Connie Souphanousinphone in King of the Hill, Trish and Sherry in Rocket Power, Yan Lin in W.I.T.C.H.

[3] At age 17, Tom landed a spot with a touring company of A Chorus Line and was cast in the Broadway production of the show less than a year later in the role of Connie.

She subsequently appeared on The Equalizer, Vengeance Unlimited, Catfish With Black Bean Sauce, thirtysomething, Quantum Leap, Chicago Hope, Homicide: Life on the Street, Grace Under Fire, Friends, The Nanny, The Middle, DAG, The Division, Monk, My Wife and Kids, Barbershop: The Series, Grey's Anatomy, The Closer, and Men in Trees.

She has also lent her voice to All Grown Up!, Rocket Power, Max Steel, Handy Manny as Mrs. Lee and Nelson, Samurai Jack, Johnny Bravo, Justice League Unlimited, Kim Possible, and Legion of Super Heroes.

She has also voiced the villains Gizmo and Jinx on Teen Titans, Yan Lin, Susan, Alchemy on W.I.T.C.H., Tasumi on The Replacements, Jake's mom, Counselor Chang on American Dragon: Jake Long, and as Joo Dee on Avatar: The Last Airbender.

She also guest-starred in The Penguins of Madagascar as Chuck Charles's co-anchor, Bonnie Chang, in "Gator Watch" and "All Tied Up With a Boa".

Other animated films Tom has voiced in include Mulan II, Kim Possible: The Secret Files, Kim Possible Movie: So The Drama, Kung Fu Panda 2, Batman Beyond: Return of the Joker, and the four Futurama television films: Bender's Big Score, The Beast with a Billion Backs, Bender's Game, and Into the Wild Green Yonder.