Harness Manufacturing Engineer - Prototype to Production

Castelion; Torrance (CA); On-site; USD 90,000 - 120,000; Full time

Job summary

Castelion is seeking a Manufacturing Specialist to lead harness fabrication process development, supplier qualification, and transition from prototype to production. The role focuses on wiring harnesses, cable assemblies, interconnect systems, and related test plans within a defense manufacturing context.

The candidate will support both in-house and supplier fabrication activities, drive continuous improvement, and ensure on-time, zero-defect delivery of harness assemblies.

Qualifications

• Bachelor's degree in engineering (Mechanical, Electrical, Manufacturing or related).
• 3+ years in manufacturing engineering with wiring harness/cable assembly, fabrication and test.
• Excellent written and verbal communication skills.
• Authorized to work in the U.S. and comply with ITAR eligibility requirements.

Responsibilities

• Create and maintain harness assembly work instructions, BOM/MBOM, harness flows, test plans, and tooling specifications for prototype and production builds.
• Qualify and develop external harness fabrication partners; define quality/test criteria and prepare production readiness.
• Support DFM/DFT reviews, connector selection, routing, and supplier handoff readiness; facilitate risk analysis and manufacturing readiness reviews.
• Develop harness test procedures and systems for continuity, insulation resistance, hi-pot/functional tests, and data analysis.
• Drive continuous improvement, yield, throughput, and cost optimization using Lean/CI methodologies.

Skills

Hands-on process development

Written and verbal communication

Problem solving

Quality awareness

ITAR/compliance awareness

Education

Bachelor's degree in engineering

Job description

Castelion is seeking a Manufacturing Specialist to lead harness fabrication process development, supplier qualification, and transition from prototype to production. The role focuses on wiring harnesses, cable assemblies, interconnect systems, and related test plans within a defense manufacturing context.

The candidate will support both in-house and supplier fabrication activities, drive continuous improvement, and ensure on-time, zero-defect delivery of harness assemblies.