Diamond has been working full-time as a stuntman since 1968 and as a stunt coordinator since 1980, appearing in over fifty feature films and over five hundred episodes of primetime television, including his current position with NCIS, where he serves as Mark Harmon’s stunt double and is the stunt coordinator. He has also doubled for Sylvester Stallone, Jameson Parker, Kevin Costner, Dennis Quaid, Jeff Bridges and Scott Bakula.
A master of his craft, Diamond was nominated for an Emmy as the Outstanding Stunt Coordinator of the Year in 2008. He has worked as a stuntman on classic Westerns TV shows including The Virginian, Bonanza, and How the West Was Won, as well as movies including Paint Your Wagon and Pale Rider. He is the son of actor and stuntman Richard Farnsworth, who was inducted into the Walk of Western Stars in 2000.