After graduating from high school in Thailand, she was cast as Maneechan, the main character in The Siam Renaissance, a 2004 film adaptation of the novel Thawiphop.

[2] John Anderson of Variety praised her performance in the otherwise poorly received The Elephant King, anticipating "a promising career, not just for her statuesque beauty but for her ability to navigate a role and character fraught with contradictions and moral shoals".

[4] Faivre guest-starred in several TV series, including How to Make It in America and The Following, before landing a major role in The Expanse, a science fiction thriller.

[6] Faivre's character Julie Mao, "a smart and rebellious woman from a wealthy family who chooses a principled life of hardship and becomes involved in politically subversive activities,"[5] was a regular in seasons 1 and 2, returning for a guest appearance in season 3.

(2017–2018), Faivre had a recurring role as "the kick-ass Kree warrior Sinara taking down folks with a duo of metal balls""[2] The 2018 film American Mirror features Faivre as well as Susan Sarandon in major roles as muses to the protagonist.