[6] Kinney had a recurring role on the supernatural drama The Vampire Diaries, joining the cast during the second season as Mason Lockwood.

[7] In 2012, Kinney landed a starring role on Chicago Fire, a drama series that follows the lives of firefighters and paramedics.

Kinney plays Lieutenant Kelly Severide on Rescue Squad 3 opposite former House star Jesse Spencer.

Also in 2012, Kinney appeared on the big screen in Kathryn Bigelow's acclaimed war drama Zero Dark Thirty.

In 2012, he guest starred on Shameless as Craig, the former high school crush of the lead character Fiona (played by Emmy Rossum).