He has guest starred as William Hofstadt on multiple episodes of the AMC show Mad Men since 2008. The character is the brother of main character Betty Draper. He also starred in the HBO miniseries Generation Kill as Corporal James Chaffin in 2008. He also appeared in the movies Toolbox Murders, Cursed and Left in Darkness. He has also appeared in the series CSI, Criminal Minds, Bones, The Unit and ER.
He is also the voice of the character Ellis in the cooperative first-person shooter game Left 4 Dead 2, as well as the voice as Cole MacGrath in the video game Infamous 2 and Street Fighter X Tekken.
In 2011 he starred in the first season of AMC mystery The Killing in the role of Jamie Wright.