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Career overview · SOC 51-2031

Engine and Other Machine Assemblers

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

Also called: Assembler · Assembly Line Worker · Cell Technician · Engine Assembler · Engine Builder · Field Service Technician

Median pay (national)
$52,540
$37,950–$74,300 (10th–90th)
Employed (US)
38,420
BLS OEWS, May 2024
Outlook 2024–34
-21.1%
~2,800 openings/yr
Typical entry
High school diploma or equivalent

What the numbers say

Refit analysis ·Pay for engine and other machine assemblers shows a broad range: the top 10% earn $74,300 versus $37,950 at the bottom 10% — 2.0x. The median of $52,540 leaves roughly 41% of headroom to the 90th percentile, which is where seniority, specialization, and the skills below tend to pay off.
Refit analysis ·Employment is projected to change -21.1% from 2024 to 2034 — a projected decline, against +3% across all occupations. Even so, BLS projects about 2,800 openings a year, mostly to replace workers who retire or change careers.
Refit analysis ·Where you work moves the number a lot. Across the 36 states with released data, North Carolina pays the most for this role (median $75,560, +44% vs the national median), while Virginia sits lowest at $34,890 — a 117% spread for the same job title.
Refit analysis ·O*NET rates Reading Comprehension, Active Listening, Speaking as the highest-importance skills here — so a resume aimed at this role should lead with evidence of those, not a generic skills list.

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Top skills employers ask for

Ranked by O*NET importance for this occupation.

  • Reading Comprehension
  • Active Listening
  • Speaking
  • Critical Thinking
  • Monitoring
  • Active Learning
  • Writing
  • Mathematics
  • Learning Strategies
  • Science

What they actually do

Core O*NET tasks for this role.

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

Tools & technology

  • Dassault Systemes SolidWorks
  • SAP software
  • Computer aided design and drafting CADD software
  • Microsoft Excel
  • Microsoft Office software
  • Microsoft Word

Knowledge areas

  • Mechanical
  • Production and Processing
  • Customer and Personal Service
  • Engineering and Technology
  • Mathematics
  • Public Safety and Security
  • Administration and Management
  • Design