Quartermaster

From publisher blurb:

This book contains the quartermaster base class.

The quartermaster is a mundane class based on skills, but plays more like a wizard than a rogue, constantly staying one step ahead of the enemy. With unparalleled flexibility, they always have just the item needed, and alter each situation to their own benefit. A quartermaster improvises new uses for gear, and fakes advanced materials and alchemical devices. Their skills turns the enemy's devices against them and battlefield into one big hazard zone. Being well supplied never was this good!