Kinney has also appeared on several other television series, including Showtime's critically acclaimed Masters of Sex and The CW's The Flash and Arrow.

[5]: 4 [8] She was then cast as Emily on Showtime's The Big C. Later, Kinney appeared on NBC's Law & Order: Criminal Intent, where she guest starred as Jeannie Richmonds.

[7] In 2011, Kinney was cast as the recurring character Beth Greene on The Walking Dead, an AMC television horror drama.

Kinney finished her role on The Walking Dead as Beth in 2014,[12] but made one final appearance in 2015 in the ninth episode of the fifth season.

[13] Kinney reprised her role of Beth Greene in November 2018 through voiceover, which is heard in Andrew Lincoln's final episode asking his character Rick Grimes what is his wound.

[17] She also landed recurring television roles on Cinemax's The Knick and Showtime's critically acclaimed Masters of Sex for four episodes.

[22] On Conviction, Kinney played Tess Larson, "the paralegal for the Unit team who[, although] extremely bright, [was] a bit naive and occasionally, an underlying dark sadness emerge[d]."

On March 30, 2016, Kinney made a guest appearance as Brie Larvan/Bug-Eyed Bandit on Arrow, a role she previously played on The Flash.

[23] On January 26, 2017, it was announced that Kinney would join the cast of ABC's Ten Days in the Valley alongside Kyra Sedgwick.

Kinney, it was reported, would play Casey, "Jane's hip and upbeat young assistant who looks up to her boss as a role model".