derrickman

From derrick +‎ man.

derrickman (plural derrickmen)

1. A member of an oil drilling rig who works on a derrick suspended above the rig floor, manhandling the drillpipe.
   • 2013, Philipp Meyer, The Son, Simon & Schuster, published 2014, page 346:

     There was a movement high in the derrick; the derrickman had come off the monkey board; he was half jumping, half sliding down the ladder.

• roughneck