Why Castelion, Why Now

Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus, ownership, and excellence are decisive advantages - and we're building a world-class team to turn bold ideas into real capability.

This is a rare opportunity to join at an early stage, where you'll have significant ownership, collaborate with exceptional teammates, and make a direct, measurable impact on our mission and the future of the company - regardless of your function.

Avionics R&D Technician - PCBA, Multiple Levels

Castelion is looking for an Avionics PCBA Technician, reporting to the Manager, R&D Operations, to support the development and production of systems required for long-range hypersonic strike vehicles. This will be a full-time, non-exempt position located in our Torrance, California facility.

As an Avionics PCBA Technician, you will work closely with engineering and manufacturing teams to execute electrical and electro-mechanical builds in support of development and production activities. This role is focused on hands-on assembly, rework, testing, and hardware integration while supporting manufacturing processes, documentation, and continuous improvement efforts.

Responsibilities

Perform PCBA soldering and rework, including installation of jumpers and component replacement as required
Build wire harnesses, cable assemblies, PCBAs, electro-mechanical units, and test equipment
Assemble, integrate, and test avionics hardware and support equipment
Execute manufacturing and test processes according to work instructions, drawings, and engineering documentation
Support development builds, prototype builds, and transition into initial production
Assist with setup and maintenance of tooling, fixtures, and manufacturing equipment
Read and interpret schematics, wiring diagrams, assembly drawings, and controlled documentation
Identify build issues and escalate discrepancies to engineering or manufacturing leadership
Support process improvement initiatives focused on quality, repeatability, and efficiency
Maintain a clean, organized, and ESD-compliant work environment
Monitor work progress against schedules and support production priorities as needed

Basic Qualifications

2+ years of avionics technician, electronics manufacturing, or related hands-on assembly experience
Experience reading electrical schematics and wiring harness drawings
Experience performing soldering and PCBA rework
Experience working with IPC-610 and IPC-620 standards
Familiarity with avionics, electrical, or electro-mechanical assembly processes
Ability to follow work instructions, engineering drawings, and controlled documentation
Strong attention to detail and workmanship quality
Experience working in an ESD-controlled manufacturing environment
Ability to work effectively in a fast-paced development and production environment

Preferred Skills and Experience

Experience in aerospace, defense, or other highly regulated industries
Experience performing rework on fine-pitch or high-density PCBAs
Experience building flight hardware, prototype hardware, or test systems
Familiarity with manufacturing documentation and configuration-controlled environments
Experience supporting engineering development builds and rapid iteration efforts
Familiarity with Atlassian tools such as JIRA and Confluence
Basic understanding of electronic troubleshooting and diagnostics
Strong communication and teamwork skills
Ability to adapt to changing priorities and evolving hardware designs

Castelion offers a generous benefits package. Please refer to the bottom of our Careers page for more details.

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.

Additional Eligibility Requirements

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.