Examples from the Web for machinist
Coburn, the more outgoing of the two, is the face of DAP but by trade is a machinist from Nevada.Why California Chrome’s Fairy Tale Didn’t End Happily Ever After|Michael Fensom|June 8, 2014|DAILY BEAST
A machinist is making a crank pin (a kind of bolt) for an engine, according to this drawing.The Teaching of Geometry|David Eugene Smith
Someone suggested that Gus Lyons, the machinist and piano tuner, could repair the spring, which he did after several hours work.Watch Yourself Go By|Al. G. Field
Needing Moulders and Machinist of course I do not know anything about the trade.