Hm.
Squire sound too simple, low-grade and novice compared to the Centurion (High Rank Footman General), Corsair (High Rank Pirate ?), Cataphract (We are talking about the most armored Cavalrymen, this is a real deal !) or high end ToS classes in General.
I support the idea of Quartermaster, though we can make a little more forge-based, like Blacksmith Master (basically, this what this class do : Repair (more than the max), enhance temporarily you armor and weap…).
But Quartermaster is definitly fine.