Cnc Programming involves writing and editing code to control CNC machines, focusing on creating precise instructions for manufacturing parts. Cnc Machinists operate CNC machines, set up equipment, and manually adjust tools to produce parts based on the programs. Both roles require knowledge of CNC operations, often share certifications like CNC operator licenses, and work in manufacturing environments. While Cnc Programmers focus on coding and software, Cnc Machinists handle machine operation and adjustments. They often collaborate, with programmers providing instructions for machinists to execute.