In 2008, she was cast in the role of the illegal immigrant Inez in the drama series Crash, based on Paul Haggis’s Oscar-winning film. After one season, she became the female lead opposite Dennis Hopper. Working with Haggis led to her being cast in his film The Next Three Days.

Atias participated in the Artists for Peace and Justice (APJ) volunteer mission with Sean Penn following the 2010 Haiti earthquake, in which she assisted the evacuation of refugees to Florida. During her second trip to Haiti, she took part in a workshop at Ciné Institute in Jacmel. In May 2010, she worked with APJ and hosted and organized a charity event at the Cannes Film Festival. In November 2010, she hosted and organized a charity event for APJ in New York, with proceeds going to the first free high school for the children of the slums of Haiti.

In 2011, Atias worked with Cynthia Mort on the television project Radical, playing to role of Ana, which Mort had written specifically for her. In 2012 she was cast in the critically acclaimed Israeli television series Allenby Street, directed by Assaf Bernstein of Fauda fame, where she played the stripper Mika, a formerly Orthodox Jewish girl who avoids her childhood secret while living a complex nightlife. She also served as a producer and worked to adapt it into a US series. She was cast in the new FX series Tyrant by the creators of the successful television series Homeland by creator and fellow Israeli, Gideon Raff.

In February 2017, Atias became a naturalized U.S. citizen.