Eamonn Walker is a British actor. He started acting in the 1980s, initially appearing in the TV shows Dempsey and Makepeace and In Sickness and in Health. In the ’90s, he had roles in the films Young Soul Rebels and Shopping. Walker became widely known for his portrayal of Kareem Saïd in the HBO television series Oz. He starred on the said show from 1997 to 2003. During the 2000s, he also had performances in the films Once in the Life, Unbreakable, Tears of the Sun, Lord of War, Cadillac Records, The Messenger, and Blood and Bone. In the 2010s, he’s best recognized for playing Battalion Chief Wallace Boden in Chicago Fire.