Mechanical Assembly Lead — Aerospace & Defense

Castelion Corporation; Torrance (CA); On-site; USD 90,000 - 150,000; Full time

Job summary

Castelion Corporation in Torrance, CA is seeking a Mechanical Assembly Lead to guide hands-on assembly and integration of aerospace hardware. You will supervise technicians, ensure safety and quality, and collaborate with engineering, manufacturing, quality, and operations to meet schedules.

This is a fast-paced, early-stage environment where ownership and practical problem solving are valued, and you will translate drawings and procedures into reliable, high-quality hardware.

Qualifications

• 3+ years hands-on experience in mechanical assembly, integration, or manufacturing.
• 1+ years leading or coordinating an assembly or production team.
• Ability to read and interpret engineering drawings, GD&T, CAD models.
• Proficiency with precision hand tools, torque tools, power tools, fixtures.
• Strong understanding of mechanical interfaces and contamination control.
• Collaborate effectively with engineering, quality, supply chain and operations.

Responsibilities

• Lead daily mechanical assembly and integration activities.
• Train, mentor, and provide direction to assemblers while promoting ownership, safety, and quality.
• Interpret and execute engineering drawings, BOMs, travelers, and procedures.
• Perform and oversee precision mechanical assembly using hand tools, torque tools, power tools, fixtures and fabrication equipment.
• Coordinate with engineering to resolve build issues and implement improvements.
• Plan labor, tooling, materials, and work-cell readiness for efficient workflow.
• Verify dimensions, interfaces, torque values, fit and workmanship with metrology tools.
• Document build status, nonconformances, rework, test results per quality system.
• Support integration and functional testing of mechanical assemblies.
• Maintain clean, organized work areas and manage cleanroom/controlled environments when needed.
• Drive continuous improvement in safety, quality, throughput, and tooling.

Skills

Mechanical assembly

Team leadership

Engineering drawings

GD&T

Precision tools

Cross-functional collab

Tools

Hand tools

Torque tools

Power tools

Fixtures

Job description

Castelion Corporation in Torrance, CA is seeking a Mechanical Assembly Lead to guide hands-on assembly and integration of aerospace hardware. You will supervise technicians, ensure safety and quality, and collaborate with engineering, manufacturing, quality, and operations to meet schedules.

This is a fast-paced, early-stage environment where ownership and practical problem solving are valued, and you will translate drawings and procedures into reliable, high-quality hardware.