The Tinkers' Union is a union of Goblintinkers (also known as Engineers). It is assumed that the Tinkers' Union headquarters is a major portion of the goblin capital of Undermine. The current leader of the Tinkers' Union is Director Riddlevox of Undermine.
The Tinkers' Union is at war with the gnomes and dwarves, the Tinkers’ Union deals with technology and the construction of gizmos, weapons and mechanical monstrosities. Director Tek'zik Riddlevox, overseer of the Undermine Tinkers’ Union, runs the union.