Operate controls to stabilize machines and to position and align drills.
Start, stop, and control drilling speed of machines and insertion of casings into holes.
Regulate air pressure, rotary speed, and downward pressure, according to the type of rock or concrete being drilled.
Select and attach drill bits and drill rods, adding more rods as hole depths increase, and changing drill bits as needed.
Drive or guide truck-mounted equipment into position, level and stabilize rigs, and extend telescoping derricks.
Operate machines to flush earth cuttings or to blow dust from holes.
Monitor drilling operations, checking gauges and listening to equipment to assess drilling conditions and to determine the need to adjust drilling or alter equipment.
Fabricate well casings.
Pour water into wells, or pump water or slush into wells to cool drill bits and to remove drillings.
Create and lay out designs for drill and blast patterns.