Head: Aly's custom cast
Rest of body: Target BBI guy
Pouches and main assault rifle: BBI
Accessories: Marauder Inc.
The United States Naval Special Warfare Development Group, otherwise known as NAVSPECWARDEVGRU, the NSWDG, or simply as DEVGRU, is the United States Navy's premier Counter-Terrorism unit. It is officially stated to have been formed after S.E.A.L. Team Six was "disbanded".
However all Spec Ops operators know S.E.A.L. Team Six was not disbanded, just re-tasked as the G.I. Joe team. Each member of the G.I. Joe team has a specific mission specialty within the many tasks and trainings of a Navy S.E.A.L.
I don't have much of a back story for this guy other than the fact that when Range Viper activity is detected, he is deployed, locates them and runs them to ground.