"Roger that, Oxide. I'll send Vinson and Lambert, Butcher Seven out."

Vinson is a Shadow Company soldier part of Butcher Seven who was sent to investigate the loss of contact with Disciple Five alongside Lambert. While he is never directly identified, he is most likely one of the Shadow Company soldiers seen near the begining of the level exiting the cave, meaning his weapon is either a Scar-H or an ACR.