Machinist: The Machinist TradeTo become a machinist, you don’t need a high school diploma, but it definitely helps. Working experience, however, is invaluable. I started my career in Washington as an apprentice at the Honeywell Machinist Plant. They have a great apprenticeship program that runs for roughly four years, and I encourage others to apply if you are in the area. If not, then I’m sure there are other similar programs available around the country.