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Aerospace & Defense
Boeing, Lockheed Martin, GE Aerospace
Engine and Other Machine Assemblers
Engine and other machine assemblers put together engines, subassemblies, and other mechanical systems from blueprints and detailed specifications. The work is hands-on and precise: you spend as much time checking fit, alignment, and measurements as you do fastening parts together. The main tradeoff is that the job rewards careful, steady work, but mistakes slow the line and often mean rework or scrap.
Also known as Mechanical AssemblerProduction AssemblerMachine AssemblerEngine AssemblerAssembly Technician
Median Salary
$52,540
Mean $56,040
U.S. Workforce
~38K
2.8K openings per year
10-Year Growth
+-21.1%
38.4K to 30.3K
Entry Education
High school diploma or equivalent
+ None experience
What This Role Looks Like in Practice
Engine and Other Machine Assemblers sits in the Trades category. In practical terms, this role combines day-to-day execution, cross-team coordination, and consistent decision-making under real business constraints.
U.S. employment is currently about ~38K workers, with a median annual pay of $52,540 and roughly 2.8K openings each year. Based on BLS projections, total employment is expected to decline from 38.4 K in 2024 to 30.3K in 2034.
Most hiring paths start with High school diploma or GED, and employers typically expect none of related experience. Many careers in this track begin around Production Assembler and can progress toward Assembly Supervisor. High-value skills usually include Operations Monitoring, Quality Control Analysis, and Blueprint Reading & Assembly Specifications, paired with soft skills such as Attention to detail, Communication, and Critical thinking.
Core Responsibilities
- Read assembly drawings and instructions so you know how the parts should go together.
- Line up parts by hand or with lifting equipment, then fasten them into place so they fit correctly.
- Drill, cut, tap, or shape parts that need extra work before they can be assembled.
- Install piping, wiring, fixtures, and other components using hand tools, rivet guns, or welding gear.
Keep exploring: more Trades careers or browse all job titles.
A Day in the Life
01 Read assembly drawings and instructions so you know how the parts should go together.
02 Line up parts by hand or with lifting equipment, then fasten them into place so they fit correctly.
03 Drill, cut, tap, or shape parts that need extra work before they can be assembled.
04 Install piping, wiring, fixtures, and other components using hand tools, rivet guns, or welding gear.
05 Measure parts with calipers, gauges, and micrometers to make sure clearances and dimensions match the spec.
06 Smooth rough edges, repair damaged pieces, and replace parts that do not meet quality standards.
Industries That Hire
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Automotive Manufacturing
Ford, General Motors, Toyota
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Industrial Machinery
Caterpillar, John Deere, Cummins
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Engine & Power Equipment
Briggs & Stratton, Kohler, Kubota
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Appliance Manufacturing
Whirlpool, GE Appliances, Electrolux
Pros and Cons
Advantages
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You can get started with a high school diploma and no prior work experience, and employers usually provide moderate-term training on the job.
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The work is concrete: you leave each shift knowing exactly what you built, repaired, or aligned.
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You use real tools and measurement gear, so the job is more than repetitive hand work; it includes reading specs and checking quality.
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Even with a declining outlook, there are still about 2.8 thousand annual openings, which creates opportunities from turnover and retirements.
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Workers who learn the line well can move into lead or supervisor roles without needing a four-year degree.
Challenges
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Pay is only moderate for the physical demands, with a median wage of $52,540 and a mean of $56,040.
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The occupation is projected to shrink by 21.1% from 38.4 thousand jobs to 30.3 thousand by 2034, so the long-term job market is getting smaller.
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A lot of the work is repetitive and physical, including lifting parts, standing for long periods, and handling components by hand.
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The job has a real career ceiling unless you move into supervision, maintenance, or another specialty, because pure assembly work is being reduced in many plants.
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Automation, production relocation, and line-speed pressure can cut staffing or move work elsewhere, which makes the job less stable than it used to be.
Career Progression
Production Assembler
0-2 years
$36K-$47K
New workers learn basic parts handling, simple fastening, and safety routines while building speed and consistency.
Engine and Machine Assembler
2-5 years
$52K-$60K
Assemblers handle full builds, read specs on their own, and check fit and measurements before a unit moves down the line.
Senior Assembler / Lead Assembler THIS ROLE
5-8 years
$61K-$74K
Experienced workers take on tougher assemblies, help solve fit problems, and may coach newer teammates.
Assembly Supervisor
8+ years
$75K-$92K
Supervisors watch output, quality, staffing, and workflow, and they step in when a line needs to be adjusted or restarted.
Education Paths
High school diploma or GED
The most common entry point, held by 64.05% of workers in this role.
Post-secondary certificate in manufacturing, welding, or mechanical assembly
A smaller share of workers come in with a certificate, at 12.88%.
Less than a high school diploma with strong shop experience
Some workers start with no diploma at all, which accounts for 11.15% of the occupation.
Moderate-term on-the-job training
BLS says workers typically learn the job through moderate-term training after hire, especially to master the plant’s tools, parts, and quality checks.
Key Skills
Technical
Operations Monitoring 60%
Quality Control Analysis 53%
Blueprint Reading & Assembly Specifications 52%
Hand Tools, Power Tools & Fastening Equipment 50%
Calipers, Micrometers & Gauges 50%
Hoists, Alignment Fixtures & Torque Tools 48%
Welding, Riveting & Repair Equipment 48%
Soft Skills
Attention to detailCommunicationCritical thinkingActive listeningTeamworkProblem solving Job Outlook and Trends
+-21.1%
Projected growth (2024-2034)
2.8K
Annual job openings
Employment is projected to rise from 38.4K to 30.3 K over the next decade, representing -21.1% growth. Around 2.8 K openings per year include both newly created roles and replacement hiring from turnover.
Remote availability is currently Rare. Demand remains strongest where employers need practical domain knowledge plus modern workflow and data skills.