Derek Webster (born January 1, 1981) is an actor who appeared in the JAG Season 7 episode, Dog Robber (Part 2) (episode) as Marine Gunnery Sergeant Smith (Dog Robber Part 2) and the JAG Season 10 episodes, This Just In from Baghdad (episode) and Death at the Mosque (episode) as Marine Captain Stanley Ellis.
He later guest-starred in the NCIS Season 1 episode, Missing (episode) as Marine Major Joe Sacco, the NCIS Season 4 episode, Dead and Unburied (episode) as Marine Captain Stengel, the NCIS: Los Angeles Season 5 episode, Between the Lines (episode) as ATF agent John Stone and also had a recurring role in the NCIS spin-off series, NCIS: New Orleans as FBI agent Raymond Isler.