Mara has worked professionally as an actress, casting director and teacher. She is best known for casting the series Gilmore Girls (with partner Jami Rudofsky). When the show ended she started an actor's collective which offered eclectic class content to professional actors and featured industry professionals (James Gunn, Danny Strong, Wendi McClendon-Covey) guesting and leading some classes. Some of Mara's collective members included Jerrika Hinton, Katie Lowes, Elizabeth Chomko and Sean Gunn.
In 2017 she became an adjunct faculty member in the BFA Acting For Film and Television Department at the performing arts college Hussian College LA (formerly known as Studio School).