Martinez is perhaps best known for her role as Michelle Miller on MyNetworkTVtelenovela, Fashion House. She was cast as a major character in Chuck, and appears in first-season promotional pictures of the cast. However, her character was cut before the series aired. She starred in the 2008 film Death Race. From 2010 to 2011, Martinez also starred in the television crime drama Detroit 1-8-7 as Detective Ariana Sanchez, which was cancelled after one season. From 2012 to 2013, she starred in the American television crime drama CSI: NY as Detective Jamie Lovato.