Avionics Harness Design Engineer

Job Description

#### About the job Avionics Harness Design Engineer

**Why Cas** ?**telion, 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 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.

**Avionics Harness Design Engineer**

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.

**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

**Basic Qualifications**

* 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

**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.

**Benefits And Perks**

All full-time employees are granted meaningful long-term equity, sharing in the company's significant growth trajectory. We offer four (4) weeks of paid time off, ten (10) company-paid holidays, and comprehensive health benefits - including 100% employee-covered medical and strong dependent coverage, along with dental and vision plans. We also provide paid parental leave to support growing families, a $100 monthly fitness stipend to promote health and performance, and onsite EV charging for convenience. In addition, employees enjoy perks like catered meals, company-covered food during high-demand periods, and a fully stocked kitchen to stay fueled throughout the day.

*While this position does not currently require a U.S government-issued security clearance, it may in the near future. Therefore, the ability to obtain and maintain a U.S. government--issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.*

**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.*