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Engine and Other Machine Assemblers

SOC 51-2031.00Job Zone 2 · Some Preparationv.26.05

Context coveredThis framework covers engine and machine assembly operations in a Job Zone 2 manufacturing environment, spanning blueprint interpretation, precision measurement, component fitting, functional testing, and shop floor quality management from entry-level assembly tasks through department-level technical leadership.

Sources:O*NET v30.2O*NET Resource Center — Occupational Information Network, v30.2 (Sept 2025). Opens in new tab.SkillsCrosswalkSkillsCrosswalk — O*NET enrichment + adjacency index. Opens in new tab.
Emerging
Entry / Apprentice
  1. Assembly blueprints and specification manuals — locate and read basic diagrams under direct supervisor guidance on the production floor.
  2. Hand tools and basic fastening equipment — identify and handle correctly during introductory assembly tasks in a supervised shop environment.
  3. Mechanical components and subassemblies — position and align manually following step-by-step instructions provided by a lead assembler.
  4. Calipers and basic gauges — use to take simple measurements and compare results against labeled tolerances with close oversight.
  5. Parts lists and stock inventories — cross-reference physical components against printed lists to confirm correct parts are staged for assembly.
  6. Surface finishing tools — remove rough spots and burrs from parts using hand files and emery cloth under direct instruction.
  7. Completed subassemblies — perform basic visual inspection to identify obvious defects before passing work to the next station.
  8. Piping fixtures and wiring connections — assist in fastening pre-fitted components using hand tools under the supervision of a skilled assembler.
  9. Assembly sequence steps — follow written work instructions and checklists to maintain correct build order during routine machine assembly.
  10. Safety protocols and shop floor procedures — demonstrate compliance with PPE requirements and tool-handling rules in a manufacturing facility.
Developing
Mid-level / Established
  1. Assembly blueprints and engineering drawings — interpret multi-view diagrams and extract dimensional specifications to plan routine build sequences independently.
  2. Micrometers, dial indicators, and precision gauges — select and apply appropriate instruments to verify parts clearances and dimensional conformance with minimal oversight.
  3. Mechanical subassemblies — position, align, and secure components using manual lifting and hoist equipment according to established assembly procedures.
  4. Piping, electrical wiring, and fixtures — fasten and route correctly into engine or machine assemblies using hand tools and rivet guns in a production environment.
  5. Drill presses and tapping tools — lay out, drill, ream, and tap parts to specification dimensions during standard machining-support tasks.
  6. Completed assemblies — operate and functionally test finished machines against customer specifications, documenting results on standard inspection forms.
  7. Quality control checklists — apply structured analysis to identify out-of-tolerance conditions and initiate corrective steps within familiar assembly contexts.
  8. Power tools and surface preparation equipment — smooth and fit mating surfaces to achieve proper part fit during assembly without dimensional damage.
  9. ERP and spreadsheet software — enter production data, parts consumption, and inspection results into shop floor tracking systems accurately.
  10. Verbal and written communication — relay assembly status updates, part discrepancies, and quality findings clearly to supervisors and co-workers during shift operations.
Proficient
Senior / Expert IC
  1. Complex engine or machine blueprints — read, interpret, and translate full specification packages into detailed assembly plans for non-routine or custom builds without supervision.
  2. Full-scope precision measurement instruments — select, calibrate, and apply micrometers, CMM data, and multi-point gauging systems to verify critical clearances across an entire assembly.
  3. Hoist rigging and alignment fixtures — plan and execute precise component positioning for heavy or geometrically complex subassemblies, resolving fit issues independently.
  4. Completed machines and engines — conduct comprehensive operational tests, diagnose capability shortfalls, and recommend corrective adjustments to meet customer performance specifications.
  5. Non-standard parts and modified assemblies — evaluate conformance against engineering drawings and substitute or adapt components when standard stock deviates from specifications.
  6. Welding equipment and advanced fastening methods — perform or oversee weld-joint assembly and high-torque fastening operations that meet structural and leak-test requirements.
  7. Root-cause analysis processes — apply critical thinking to trace assembly defects back to upstream causes and implement durable corrective actions on the production floor.
  8. CAD and ERP software — extract dimensional data, cross-reference work orders, and confirm bill-of-materials accuracy to support efficient build scheduling.
  9. Surface machining operations — plan and execute drilling, reaming, and tapping sequences for custom or rework assemblies, selecting tooling and feeds to maintain dimensional integrity.
  10. Quality assurance documentation — author and maintain assembly procedure updates, inspection records, and non-conformance reports that support regulatory and customer audit requirements.
Advanced
Lead / Principal / Executive
  1. Assembly standards and work instructions — author, revise, and approve facility-wide procedures that govern engine and machine build quality across all product lines.
  2. Production quality systems — lead implementation of statistical process control and measurement system analysis programs to drive defect reduction across the assembly department.
  3. Workforce capability development — design and deliver structured on-the-job training programs that build technical competency in blueprint reading, precision measurement, and assembly methods for new and incumbent assemblers.
  4. Capital tooling and equipment strategy — evaluate and recommend acquisition of hoists, precision instruments, and CNC support equipment to expand shop capacity and improve accuracy.
  5. Customer specification compliance — serve as the technical authority in customer meetings and audits, translating complex requirements into actionable assembly standards and acceptance criteria.
  6. Cross-functional engineering collaboration — partner with design and process engineering teams to identify and resolve producibility issues before new engine or machine designs enter full production.
  7. ERP and digital manufacturing platforms — lead configuration and adoption of enterprise software to integrate bill-of-materials, assembly routing, and inspection data across the production operation.
  8. Safety and continuous improvement culture — champion hazard-reduction initiatives and Lean or 5S programs that sustainably improve shop floor ergonomics and operational efficiency.
  9. Production throughput and cost management — analyze assembly cycle times, rework rates, and material usage data to set performance targets and drive measurable improvement in output quality.
  10. Organizational knowledge transfer — document institutional expertise in complex assembly techniques and mentor senior assemblers to ensure critical technical knowledge is retained and disseminated across the workforce.

AI-at-Work Competency Framework

Sources:Anthropic Economic IndexAnthropic Economic Index — release_2026_03_24. Opens in new tab.Jadhav & Danve, 2026Skill Automation Feasibility Index — Jadhav & Danve, 2026 (arXiv:2604.06906). Opens in new tab.WEF Skills TaxonomyWEF Skills Taxonomy 2021 — Building a Common Language for Skills at Work. Opens in new tab.

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Sources:Pathsmith™ Durable SkillsPathsmith™ Durable Skills Framework — America Succeeds + CompTIA. Opens in new tab.O*NET v30.2O*NET Resource Center — Occupational Information Network, v30.2 (Sept 2025). Opens in new tab.
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RAPIDS apprenticeships
0091 · Gunsmith
O*NET skills
Operations MonitoringQuality Control AnalysisReading ComprehensionCritical ThinkingMonitoringSpeakingActive Listening
Knowledge domains
MechanicalProduction and ProcessingCustomer and Personal Service
Abilities
Arm-Hand SteadinessManual DexterityFinger DexterityNear VisionVisualizationProblem SensitivityControl PrecisionMultilimb CoordinationStatic StrengthExtent Flexibility
Work styles
Attention to DetailDependabilityCautiousnessAchievement OrientationIntegrityStress Tolerance
Technology
Computer aided design CAD softwareSpreadsheet softwareOffice suite softwareWord processing softwareEnterprise resource planning ERP software
Tasks · seed anchors for statements
  1. Read and interpret assembly blueprints or specifications manuals, and plan assembly or building operations.
  2. Inspect, operate, and test completed products to verify functioning, machine capabilities, or conformance to customer specifications.
  3. Position or align components for assembly, manually or using hoists.
  4. Set and verify parts clearances.
  5. Verify conformance of parts to stock lists or blueprints, using measuring instruments such as calipers, gauges, or micrometers.
  6. Fasten or install piping, fixtures, or wiring and electrical components to form assemblies or subassemblies, using hand tools, rivet guns, or welding equipment.
  7. Remove rough spots and smooth surfaces to fit, trim, or clean parts, using hand tools or power tools.
  8. Lay out and drill, ream, tap, or cut parts for assembly.
CIP education codes
47.0615

Sources: O*NET v30.2 (CC BY 4.0), SkillsCrosswalk.com, LER.me®, Anthropic Economic Index, SAFI (Jadhav & Danve, 2026), WEF Skills Taxonomy 2021, Pathsmith™ Durable Skills Framework. © 2026 EBSCOed.