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Engine and Other Machine Assemblers - 51-2031.00

O*NET-SOC Description

Construct, assemble, or rebuild machines, such as engines, turbines, and similar equipment used in such industries as construction, extraction, textiles, and paper manufacturing.

Sample of Reported Job Titles

  • Assembler
  • Machine Assembler
  • Assembly Line Worker
  • Fitter
  • Cell Technician
  • Engine Assembler
  • Engine Builder
  • Field Service Technician
  • Fuel Injection Technician
  • Jet Engine Assembler

SOC Occupation Groups

51-0000 Production Occupations
51-2000 Assemblers and Fabricators
51-2030 Engine and Other Machine Assemblers
51-2031.00 Engine and Other Machine Assemblers

Related Occupations


  • Assemble systems of gears by aligning and meshing gears in gearboxes.
  • Fasten or install piping, fixtures, or wiring and electrical components to form assemblies or subassemblies, using hand tools, rivet guns, or welding equipment.
  • Inspect, operate, and test completed products to verify functioning, machine capabilities, or conformance to customer specifications.
  • Lay out and drill, ream, tap, or cut parts for assembly.
  • Maintain and lubricate parts or components.
  • Position or align components for assembly, manually or using hoists.
  • Read and interpret assembly blueprints or specifications manuals and plan assembly or building operations.
  • Remove rough spots and smooth surfaces to fit, trim, or clean parts, using hand tools or power tools.
  • Rework, repair, or replace damaged parts or assemblies.
  • Set and verify parts clearances.
  • Set up and operate metalworking machines, such as milling or grinding machines, to shape or fabricate parts.
  • Verify conformance of parts to stock lists or blueprints, using measuring instruments, such as calipers, gauges, or micrometers.

Detailed Work Activities

  • Align parts or workpieces to ensure proper assembly.
  • Apply lubricants or coolants to workpieces.
  • Assemble electromechanical or hydraulic systems.
  • Cut industrial materials in preparation for fabrication or processing.
  • Drill holes in parts, equipment, or materials.
  • Inspect installed components or assemblies.
  • Lay out parts to prepare for assembly.
  • Measure dimensions of completed products or workpieces to verify conformance to specifications.
  • Operate grinding equipment.
  • Operate metal or plastic forming equipment.
  • Plan production or operational procedures or sequences.
  • Repair parts or assemblies.
  • Replace worn equipment components.
  • Review blueprints or other instructions to determine operational methods or sequences.
  • Set equipment guides, stops, spacers, or other fixtures.
  • Smooth metal surfaces or edges.

Military Crosswalk Titles

No information available.

Apprenticeship Crosswalk Titles

  • Assembler, Aircraft Power Plant
  • Electric-Motor-and-Generator Assembler
  • Machine Assembler
  • Machine Builder

DOT Crosswalk Titles

  • Assembler
  • Assembler, Aircraft Power Plant
  • Assembler, Internal Combustion Engine
  • Assembler, Mining Machinery
  • Assembler, Steam-and-Gas Turbine
  • Blower and Compressor Assembler
  • Diesel-Engine Erector
  • Electric-Motor-and-Generator Assembler
  • Farm-Machinery Set-Up Mechanic
  • Injector Assembler
  • Internal-Combustion-Engine Subassembler
  • Machine Assembler
  • Machine Builder
  • Progressive Assembler And Fitter
  • Rotary-Engine Assembler
  • Sewing-Machine Assembler
  • Subassembler
  • Turbine Subassembler
  • Turbine-Blade Assembler