Supervises or operates electric, pneumatic, and internal combustion powered machines used in drilling, crushing, grading, and cleaning gravel and rock, or detonates explosives to blast rock in quarries and at construction sites.
Skill Level 1 Operates rock drills under supervision. Assembles, adjusts, and operates crushing, screening, conveying, and washing units. Assists in blasting operations. Assists in performance of combat engineer missions.
Skill Level 2 Directs the erection of rock processing equipment. Determines screen sizes and crusher settings to produce aggregate to specifications. Directs quarry rock excavation to produce required sizes and tonnage of rock. Performs as blaster.
Skill level 3 Conducts and plans quarry reconnaissance and plant layout. Supervises the setup and calibration of a rock processing plant. Plans and supervises blasting operations. Supervises rock production operations. Directs combat engineering missions.
Air Force
Coast Guard
Marine Corps
National Guard
Navy