[5] Sigman began her career appearing on Mexican television, before making her film debut in Rio de Oro.

[12] In 2013, Sigman played the leading role in the USA Network drama pilot The Arrangement opposite Bryan Greenberg.

[14] In 2015, Sigman played Valeria Vélez, a character based on Virginia Vallejo, in the Netflix crime thriller Narcos.

[19] In 2016, Sigman had a recurring role as Monica Ava during the second season of the ABC anthology drama series American Crime created by John Ridley.

[21] In 2017, Sigman began playing Jessica Cortez, captain and commanding officer of the LAPD Metropolitan Division in S.W.A.T..[22] She exited at the start of the third season, when her character left to pursue FBI training.