Avionics Harness Design Engineer

Castelion Corporation•Torrance, CA

4h•Onsite

About The Position

Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus and technical excellence are decisive advantages - and we are building a team that can deliver real capability, not just concepts. This is a rare opportunity to join at an early stage, where your work will directly shape critical systems, influence major technical decisions, and have immediate, real-world impact. We are seeking an Avionics Harness Design Engineer to lead the design, development, and integration of electrical harnessing across our missile and vehicle systems. This engineer will play a critical role in ensuring robust, manufacturable, and high-reliability electrical connectivity throughout the system. You will partner closely with avionics, power, structures, and propulsion teams to deliver mission-critical hardware in a fast-paced, hardware-rich environment. You will additionally support avionics and harness integration at the system and vehicle levels.

Requirements

Bachelor's or Master's degree in Electrical Engineering, Mechanical Engineering, Aerospace Engineering, or related field
2+ years of experience in cable harness design for aerospace, defense, or high-reliability hardware systems
Proficiency with CAD/ECAD tools for harness design (e.g., CATIA, Creo, SolidWorks Electrical, Capital, RapidHarness, AutoCAD, or equivalent)
Strong knowledge of aerospace wiring standards (e.g., IPC/WHMA-A-620, NASA-STD-8739, or MIL-SPEC requirements)
Familiarity with harnessing in environments with high thermal and small volume requirements
Hands-on experience supporting harness manufacturing, assembly, and testing
Ability to work cross-functionally with avionics, power, propulsion, and integration teams
Strong problem-solving and troubleshooting skills in test and integration environments
U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.
The ability to obtain and maintain a U.S. government–issued security clearance is required.

Responsibilities

Design, route, and document electrical harnesses to support missile and vehicle system integration
Generate wiring diagrams, schematics, and harness assembly drawings in accordance with aerospace standards
Select appropriate wires, connectors, backshells, shielding, and protection materials to meet environmental and system requirements
Collaborate with avionics, power, and structural engineering teams to ensure proper integration of harnesses into overall vehicle design
Develop and maintain harness BOMs (bill of materials) and ensure manufacturability at scale
Support harness build, installation, and troubleshooting during integration and testing
Ensure designs meet electrical, mechanical, and thermal requirements for high-reliability aerospace applications
Identify and implement process improvements to increase efficiency, manufacturability, and quality

Benefits

Meaningful long-term equity
Four (4) weeks of paid time off
Ten (10) company-paid holidays
Comprehensive health benefits - including 100% employee-covered medical and strong dependent coverage
Dental and vision plans
Paid parental leave
$100 monthly fitness stipend
Onsite EV charging
Catered meals
Company-covered food during high-demand periods
Fully stocked kitchen