Ability to work with all following materials: aluminum, mild steels, medium carbon steel, tool steels, all grades of stainless steels, cast iron, nylon, Delrin, acrylic, copper, brass, and various grades of Phenolic. As a CNC Machinist Senior, you will: Develop wire frame and solid models, modify imported models, and edit post processors to suit various equipment using Tebis, WorkNC or Mastercam software.