[5] Rocha's career began on stage in the August 1993 revival of the Jane Bowles play In the Summer House at the Vivian Beaumont Theater.

[6] Since then she has been in multiple Broadway and Off-Broadway productions including Noises Off and Nicky Silver's comedy The Altruists where she created the role of Cybil.

[8] She also had a recurring role on Buffy the Vampire Slayer as Anya's vengeance demon friend, Halfrek, and appeared as William the Bloody's love interest, Cecily.

Rocha played Stonewall Jackson's wife, Anna in Ron Maxwell's Gods and Generals, an epic drama about the first two years of the American Civil War.

Rocha has also played the character of a fourth-year resident surgeon, Dr. Sydney Heron, at Seattle Grace Hospital in the ABC TV series Grey's Anatomy.