Tool and Die Makers are a class of machinists in STAMCO who make jigs, fixtures, dies, molds, machine tools, cutting tools, gauges, and other tools used in manufacturing processes. Depending on which area of concentration a particular person works in, he or she may be called by variations on the name, including tool maker, die maker, mold maker, tool fitter, etc.

Tool and Die Makers work primarily in tool room environments but more often in an environment with flexible, semi permeable boundaries from production work. They are skilled artisans (craftspeople) who typically learn their trade through a combination of academic coursework and hands-on instruction, with a substantial period of on-the-job training that is functionally an apprenticeship. Art and science are thoroughly intermixed in their work, as they also are in designing. Job-shop machinists can be any combination of toolmaker and production machinist. Some work only as machine operators, whereas others switch fluidly between tool room tasks and production tasks.