Ling's parents grew up in Cambodia, and later fled to the United States during the Cambodian genocide, shortly before her birth.

She made her TV debut in 2003 on Buffy the Vampire Slayer, and later starred in the recurring role of Kim Tao on NBC's Studio 60 on the Sunset Strip.

Her other major guest and recurring roles on television include stints on House, ER, Grey's Anatomy, The O.C., and The Deep End.

In 2008, Ling voiced and filmed her first live action series for the video game Command and Conquer: Red Alert 3.

In 2020, Ling appeared as a guest on the Studio 60 on the Sunset Strip marathon fundraiser episode of The George Lucas Talk Show.