He is a two-time Screen Actors Guild Awards nominee for his roles in The Unit and CSI: NY.
[5] Howell has performed stunt-work in numerous works including, Mel Gibson's The Patriot (2000), The Last Castle (2001) with American actor Robert Redford, Murder By Numbers (2002), Jesse Dylan's American Wedding (2003), Victor Salva's Jeepers Creepers 2 (2003), CSI: NY (2004–13) The Unit (2006–07),[6] Hell Ride (2008).
[9] As an actor, he has starred in films such as Need for Speed, Death Sentence,[10] Hell Ride,[11] Priest, Aces 'N' Eights, Mr. Brooks, Secondhand Lions and The Patriot.
[7][12][13] On television, Howell starred in NBC's Grimm, CBS's The Unit, The Young and the Restless, True Blood, CSI: NY and Criminal Minds.
[11] Howell has been a stunt double for many actors, including, Ewan Mcgregor, Elijah Wood, Skeet Ulrich, Garrett Hedlund, Chris Browning, Michael Eklund, Jason Gerhardt, David Hoflin, Matt Cohen and Seth Adkins.