Composites Technician - Filament Winding Hardware

Front Door Defense; Torrance (CA); On-site; USD 60,000 - 80,000; Full time

Benefits offered by this job

Employee Equity

Personal Time Off

Company Paid Holidays

Medical

Dental & Vision

FSA/HSA

Retirement

Paid Parental Leave

Meals & Catering

Snacks & Beverages

Performance & Fitness

EV Charging

Job summary

Castelion is looking for a skilled Composites Technician to operate and maintain filament winding equipment for aerospace component fabrication in Torrance, California. Responsibilities include composite processing and equipment troubleshooting.

The ideal candidate has over 4 years of industry experience and a high school diploma. Benefits include employee equity, paid time off, and health plans.

Qualifications

• 4+ years of experience operating manufacturing or composite processing equipment.
• Experience working with composite materials, resin systems, and fiber handling processes.
• Familiarity with precision measuring equipment including calipers, micrometers, and gauges.

Responsibilities

• Prepare, set up, and operate filament winding equipment.
• Operate cure ovens and monitor cure cycles.
• Execute composite processing tasks including material preparation and inspection.

Skills

Experience operating manufacturing or composite processing equipment

Working with composite materials

Following written work instructions

Mechanical aptitude

Education

High school diploma or equivalent

Tools

Precision measuring equipment

Job description

Composites Technician - Filament Winding

Lead hands‑on filament winding production for rocket motor components and aerospace structures

Location: Torrance, California, United States

Job Tags: Hardware

About The Role

Composites Technician – Filament Winding

Castelion is seeking a hands‑on Composites Technician to support the fabrication of rocket motor cases, nozzles, and other advanced filament wound structures. This role focuses on operating winding equipment, executing composite manufacturing processes, and supporting rapid hardware development and production.

Responsibilities

• Prepare, set up, and operate filament winding equipment for composite hardware manufacturing.
• Operate cure ovens and monitor cure cycles in accordance with process specifications.
• Execute composite processing tasks including material preparation, resin handling, winding, curing, trimming, and inspection.
• Read and interpret engineering drawings, manufacturing travelers, and process specifications.
• Set up, adjust, and troubleshoot winding equipment, tooling, machine programs, and cure equipment.
• Support development and refinement of winding patterns and manufacturing methods with engineering teams.
• Inspect hardware for dimensional and visual quality requirements and perform rework when necessary.
• Maintain clean and organized equipment, tooling, and production work areas.
• Support fast‑paced development and production builds while maintaining quality and safety standards.

Basic Qualifications

• High school diploma or equivalent.
• 4+ years of experience operating manufacturing or composite processing equipment.
• Experience working with composite materials, resin systems, and fiber handling processes.
• Familiarity with precision measuring equipment including calipers, micrometers, and gauges.
• Ability to accurately follow written work instructions and manufacturing procedures.
• Mechanical aptitude and ability to work with production tooling and fixtures.

Preferred Skills and Experience

• Experience with filament winding, rocket hardware, or aerospace composite structures.
• Experience operating industrial ovens or composite cure systems.
• Ability to interpret engineering drawings and composite layup/winding requirements.
• Experience supporting equipment setup, machine troubleshooting, or process optimization.
• Comfortable working independently and collaboratively in a high‑tempo manufacturing environment.
• Experience with custom tooling or automated manufacturing systems.

Benefits And Perks

• Employee Equity: Meaningful equity for all full‑time employees - share value has increased 150x in three years
• Personal Time Off: Four (4) weeks of paid time off to unplug, reset, and come back sharp—velocity matters, burnout doesn't
• Company Paid Holidays: Ten (10) company paid holidays
• Medical: We offer plans at 100% employee covered and 80% of dependent coverage
• Dental & Vision: We cover 90% employees and 80% for dependents to ensure you and your family have access to quality preventive and ongoing care
• FSA/HSA: To support long‑term health and financial resilience, we offer FSA and HSA options that allow employees to set aside pre‑tax dollars for eligible medical and dependent care expenses
• Retirement: 401k plan offered to support long term financial growth along side high‑impact, high‑velocity work
• Paid Parental Leave: We support growing families with meaningful time to bond and recover. Birthing parents are eligible for up to 10 weeks of paid leave, while non‑birthing parents may take up to 4 weeks of paid leave. This time can be used for pre‑natal care, pregnancy, childbirth, and related medical needs—ensuring every parent has the support they need during this important life moment.8‑weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees
• Meals & Catering: Frequently catered lunches and team meals, plus company‑covered meals when extra time or effort is required
• Snacks & Beverages: Fully stocked kitchen with unlimited snacks and drinks to keep you fueled throughout the day
• Performance & Fitness: $100 monthly fitness stipend to support peak performance and health, both inside and outside of work
• EV Charging: Onsite electric vehicle charging available for employees

Physical Demands

• Must be willing to work extended hours and/or weekends as needed
• Must be able to travel up to 30%
• Must be able to lift more than 50lbs

ITAR Requirements

To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State.

This position may require access to classified information or restricted U.S. Government sites, systems, or information, as determined by the Company and/or applicable U.S. Government requirements. If the position is so designated, your employment in the role may be contingent upon your ability to obtain and maintain the required U.S. Government security clearance or other government authorization, and to satisfy any citizenship or other eligibility requirements imposed by applicable law, regulation, executive order, or government contract requirements. You will be notified if and when such requirements apply. Failure to obtain or maintain any required clearance or authorization may result in reassignment, leave, or separation from employment, consistent with business needs and applicable law.

Affirmative Action/EEO Statement

Employment with Castelion is governed on the basis of competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.

Other Duties

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.