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, Fitter, Large Engine Assembler, Machine Assembler, Mechanical Assembler, Air Conditioning Coil Assembler (AC Coil Assembler), Aircraft Engine Assembler, Aircraft Power Plant Assembler, Aircraft Powerplant Assembler, Assembler Erector, Assembling Motor Builder, Automation Machine Builder, Automobile Engine Assembler, Automotive Production Worker, Bearing Ring Assembler, Blower and Compressor Assembler, Clutch Housing Assembler, Compressor Assembler, Crane Assembler, Diesel Engine Erector, Dyno Technician (Dynamometer Technician), Electric Motor and Generator Assembler, Electrical Motor Assembler, Electromechanical Assembler, Engine Cowling Installer, Engine Test Cell Technician, Exhaust Machine Operator, Farm Equipment Assembler, Farm Machinery Assembler, Farm Machinery Set-Up Mechanic, Gas Turbine Assembler, Gasoline Engine Assembler, Generator Assembler, Generator Technician (Generator Tech), Injector Assembler, Internal Combustion Engine Assembler, Internal Combustion Engine Subassembler, Jet Engine Assembler, Machine Builder, Manufacturing Assembler, Metal Precision Machine Assembler, Mining Machinery Assembler, Motor Builder Assembler, Motor Installer, Motor Setter, Motors Assembler, Product Assembler, Progressive Assembler and Fitter, Race Engine Builder, Rotary Engine Assembler, Sewing Machine Assembler, Steam and Gas Turbines Assembler, Steam Turbine Assembler, Subassembler, Tractor Engine Assembler, Transmission Builder, Transmission Rebuilder, Truck Engine Assembler, Truck Transmission Assembler, Truck Transmission Builder, Turbine Assembler, Turbine Blade Assembler, Turbine Engine Assembler, Turbine Subassembler, Valve Maker, Valve Setter

This is a career information profile, not an advertised job opening.

What the worker does

Read and interpret assembly blueprints or specifications manuals, and plan assembly or building operations.
Inspect, operate, and test completed products to verify functioning, machine capabilities, or conformance to customer specifications.
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.

Skills, machines and equipment

Operations Monitoring
Reading Comprehension
Quality Control Analysis
Active Listening
Speaking
Critical Thinking
Monitoring
Social Perceptiveness
Complex Problem Solving
Operation and Control
Equipment Maintenance
Troubleshooting

Education and training

Most frequently reported education in the O*NET survey: High School Diploma or the equivalent (such as a GED) (64.05% of responses). This is survey context, not a universal hiring requirement. Usually requires a high school diploma or GED, though some occupations may not.

O*NET Job Zone 2: Ranges from a few days to one year of on-the-job training. Some occupations may need little or no previous experience; others require several months to a year of experience. For example, landscaping and groundskeeping workers might require very little training or previous experience, while agricultural equipment operators can benefit from on-the job training. This is broad occupational preparation context; confirm the requirements for a specific employer or apprenticeship.

Apprenticeships

Ask an employer or registered apprenticeship sponsor about current programs, eligibility, training and pay. A career profile does not confirm that a program is available.

Salary reference

45,230–74,920 USD per year · United States · 2025. Source: BLS OEWS via O*NET · 25th–75th percentiles · SOC 51-2031.

Occupational-group wage references are not guaranteed pay for this specialty or an employer's offer.

Career advancement

Develop reliable production, safety, quality, and equipment skills; explore additional processes, senior specialist, or team-lead responsibilities relevant to your workplace.
Ask employers which demonstrated skills, education, or credentials are needed for the next role. Related careers are exploration options, not automatic promotions.

How Do I Get This Job?

Review the skills and responsibilities above.
Most frequently reported education in the O*NET survey: High School Diploma or the equivalent (such as a GED) (64.05% of responses). This is survey context, not a universal hiring requirement. Usually requires a high school diploma or GED, though some occupations may not.
O*NET Job Zone 2: Ranges from a few days to one year of on-the-job training. Some occupations may need little or no previous experience; others require several months to a year of experience. For example, landscaping and groundskeeping workers might require very little training or previous experience, while agricultural equipment operators can benefit from on-the job training. This is broad occupational preparation context; confirm the requirements for a specific employer or apprenticeship.
Compare real openings and confirm requirements directly with the employer.

View available jobs — availability is not guaranteed; sample listings are not real openings.

Related career information

Sources and limitations

O*NET® 31.0 Database, U.S. Department of Labor, Employment and Training Administration, under CC BY 4.0. ShopFloor adapted occupational grouping, selected manufacturing-relevant occupations, and retained seven legacy guide titles. Specialties and alternative titles are grouped under O*NET occupations; these occupations can also occur outside manufacturing. Source: https://www.onetcenter.org/database.html. No wage, vacancy, certification, or video data is implied. ShopFloor advancement suggestions are general editorial guidance, not O*NET findings or guaranteed career progression. BLS wage ranges, when available, are national 25th–75th percentiles for the source occupational grouping, across industries; they are not local, apprentice, entry-level, or specialty-specific offers.

Engine and Other Machine Assemblers