Workers who operate, tend, or feed one or more power driven presses that cut, bend, punch, trim, compress, forge, rivet, emboss, upset, or force together materials to shape, fabricate, or assemble them by action of dies mounted on bed and ram of machine. Material may be manually or automatically fed into such press.

Classifications are made according to function of machine as assembly-press operator, compression-molding-machine tender, embossing-press operator, forging-press operator i, forging-press operator ii, punch-press operator i, punch-press operator ii, punch-press operator iii.