Guard Thomas is a level 30 quest giver located by the bridge west of Eastvale Logging Camp in the human starting zone of Elwynn Forest. He is a member of the Stormwind Guard.
He starts the following quests:
[10] Find the Lost Guards
[10] Protect the Frontier
[10] Deliver Thomas' Report
[10] Bounty on Murlocs
See List of Elwynn Forest NPCs.