Chon started acting in 2005 in shows such as Jack & Bobby and Taki & Luci. He came to fame in 2006 when he played Peter Wu in the Disney Channel film Wendy Wu: Homecoming Warrior. He also played Tony Lee in the Nickelodeon sitcom Just Jordan. In 2008, he played Eric Yorkie in the film Twilight, based on the book by Stephenie Meyer. Chon reprised his role as Eric Yorkie in the Twilight sequel New Moon. He starred as the central character Jeff Chang, in the film 21 & Over in 2013. He also appeared in the independent film Innocent Blood that same year. In 2014, Chon appeared as a lead character in crime drama film Revenge of the Green Dragons, which was executive produced by Martin Scorsese. In 2015, Chon starred as Sid Park, the trouble-making main character influenced by rocker culture in the independent film Seoul Searching, directed by Benson Lee, which made its premiere at the 2015 Sundance Film Festival. In 2016, Chon held a role in the Korean American comedy drama Dramaworld. In March 2017, he was cast as a series regular in the ABC crime drama Deception.