---
title: 'Principal Harness Design Engineer at Epirus'
canonical: 'https://feeny.ai/job/principal-harness-design-engineer-epirus-torrance-9jh8jpd2byr8'
type: 'job'
last_seen: '2026-10-16'
---

# Principal Harness Design Engineer at Epirus

- **Company:** Epirus
- **Location:** Torrance, CA
- **Compensation:** $154k–$180k
- **Posted:** 2026-09-17
- **Last confirmed live:** 2026-10-16
- **Apply:** https://www.epirusinc.com/open-roles?gh_jid=6191669004

## Job description

## About Epirus

Epirus is a high-growth technology company dedicated to overcoming the asymmetric challenges inherent to the future of national security. Epirus' flagship product, Leonidas, is a software-defined system built using intelligent power management techniques which allow power-hungry systems to do more with less.

Job Summary: We are looking for a principal harness design engineer to innovate on the next generation of HPM products. You will own the full life cycle for harness design, from leading systems level design guidelines to executing through harness build & integration. This multi-disciplinary role will have you designing novel harnessing solutions for a variety of platforms in a rapid development environment.

Responsibilities:

- Lead the design and execution of electrical harness architectures for HPM systems
- Develop detailed harness designs from systems-level requirements / constraints
- Lead systems-level harness guidance for high-EMI systems, such as shielding strategies, grounding approaches, power distribution layout and signal pathing
- Evaluate and specify components such as connectors, wiring / cables, strain relief features and shield termination hardware
- Create, release and maintain harness documentation packages such as system block diagrams, interconnect schematics, 3D CAD routing models and production drawings
- Collaborate with cross-functional teams to define harness requirements, ensuring alignment between stakeholders such as engineering, production, quality and product management
- Provide engineering support to select and manage vendors to manufacture and assemble designed parts
- Support rapid development cycles, including prototyping, deployment, and continuous improvement
- Support build and test phases, including harness quality inspections and on-site troubleshooting

Basic Qualifications:

- Bachelor’s degree in Mechanical Engineering, Electrical Engineering, or a related technical field (or equivalent experience)
- 8+ years designing interconnect systems for harsh-environment applications such as defense, aerospace or industrial platforms
- Proficiency in interpreting / working from wiring diagrams and interconnect documentation
- Experience with designing harness systems that are optimized for voltage drop, thermal performance, component derating, EMI effects and interference / crosstalk.
- Experience with Altium Harness Design or similar harness design software package (Zuken, Siemens Capital, CATIA Electrical, etc...)
- Familiarity with requirements for cable and harness design, fabrication, inspection, and acceptance in accordance with IPC/WHMA-A-620, J-STD-001, SAE AS50881 and/or NASA-STD-8739.4
- Working knowledge of GD&T and common engineering drawing standards (ASME Y14.5)

## Preferred Skills and Experience

- Working familiarity with communication standards and data buses (e.g., Ethernet, CAN, RS-422)
- Experience with High Voltage / 3-Phase AC Design
- Experience with CAD (Solidworks or similar)
- Hands-on experience with harness assembly
- Comfort with creating harness test procedures / verification processes
- Familiarity with MIL-STD-810 and associated harsh environmental considerations

## ITAR REQUIREMENTS:

- To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR [here](https://www.pmddtc.state.gov/ddtc_public/ddtc_public?id=ddtc_kb_article_page&sys_id=24d528fddbfc930044f9ff621f961987).

At Epirus, you’ll work with technical peers and great people—and get first crack at some of the defining technology challenges of our time. Here, “impossible” is just a challenge. We're a diverse, fast-growing team of change-makers fueling the future of energy with revolutionary solutions. [Join us and rewrite the rules.](https://www.epirusinc.com/open-roles) As required by the Equal Pay Transparency Act, Epirus provides a reasonable range of minimum compensation for roles that may be hired. Actual compensation is influenced by a wide array of factors including but not limited to skill set, level of experience, and specific office location. For the state of California only, the range of starting pay for this role is: $154,100—$179,800 USD

## About Epirus

## Company Overview
- **One-liner**: Epirus develops software-defined, solid-state high-power microwave (HPM) systems and advanced electronics to defend against drone swarms and asymmetric threats.
- **Entity Type**: Private (Series D; total funding $548.4M)
- **Headquarters**: Torrance, California, United States
- **Founded**: 2018
- **Founders**: John T. and Nathan Mintz

## Core Business
- **Primary industry**: Defense and Space Manufacturing – directed energy, electronic warfare, counter-UAS.
- **Target customers**: U.S. Department of Defense (Army, Navy, Marines), allied governments, and critical‑infrastructure operators (B2G, B2B).
- **Mission**: “To protect and sustain civilization” by advancing the frontiers of high-power microwave technology for asymmetric challenges.

## Products & Services
- **Leonidas™ (High‑Power Microwave System)**: Software‑defined, long‑pulse HPM platform for counter‑drone swarm operations. Defeated a 49‑drone swarm in live‑fire demonstrations. Configurable as fixed, semi‑fixed, or mobile (hitch‑mounted).
- **Leonidas H₂O**: Maritime interdiction variant for unmanned surface vessel (USV) protection.
- **Epirus Pod**: Compact, portable HPM system for special operations, de‑mining, and small‑platform integration.
- **Air Domain Awareness**: Always‑on perception systems using big data and ML to monitor, track, and mitigate UAS incursions.
- **Advanced Electronics**: Hardware/software/AI modules that enable high‑power performance across demanding use cases.

## Market Standing
- **Valuation**: Not publicly disclosed (conflicting reports; latest funding round implied valuation significant)
- **Key Metric**: Annual Revenue ~$115M (2025–2026 estimate) | Total Funding $548.4M [LinkedIn](https://www.linkedin.com/company/epirus)
- **Notable Investors**: 8VC (lead Series A), T. Rowe Price (lead Series C), M42 (lead corporate round in 2025). Other backers include Stu Shea (board member).
- **Growth Signals**:
  - Headcount of 189 (+19.8% YoY, +41 employees) [LinkedIn](https://www.linkedin.com/company/epirus)
  - $250M Series D (2025/2026) closed to hyperscale Leonidas production
  - U.S. Army contracts: $43.5M (IFPC‑HPM Gen II), $66.1M for Leonidas directed‑energy prototypes
  - Finalized delivery of four IFPC‑HPM prototypes to U.S. Army (June 2026)
  - International expansion: offices in Italy and UK, 49k+ LinkedIn followers (70.8% yearly growth)

## Competitive Advantages
- **Solid‑state, long‑pulse HPM** that is software‑defined and scalable – unlike legacy tube‑based systems.
- **AI‑driven intelligent power management** lets power‑hungry systems “do more with less.”
- **Rapid prototyping & delivery** – Leonidas was delivered to the U.S. Army in record time.
- **Proven against real‑swarm threats** – 100% kill rate in 49‑drone demonstration.
- **Modular, vehicle‑agnostic architecture** that integrates with existing sensor and weapon platforms.

## Strategic Focus
- Scaling Leonidas production capacity for critical‑asset protection (driven by $250M Series D) [epirusinc.com](https://www.epirusinc.com/)
- Expanding maritime capabilities (Leonidas H₂O) and pod‑based EW for special operations.
- Deepening partnership with U.S. Army (IFPC‑HPM program) and entering allied markets (UK, Italy).
- Continuing to invest in AI/ML for air‑domain awareness and autonomous threat identification.

## Why Work Here
- **Culture & Values**: Built on four pillars – Accountability, Respect, Commitment, Speed with Discipline. Described as “Neo Prime” for asymmetric warfare – fast‑paced, mission‑driven.
- **Work Environment**: Hybrid/flexible with offices in Torrance (HQ), Hawthorne, and Law (innovation center). Casual dress, catered lunches, stocked kitchens.
- **Benefits**:
  - Up to 100% paid medical coverage, robust vision & dental, flex accounts.
  - Stock options (full vesting), 6% 401k match, annual dependent‑care support, monthly electronics stipend.
  - 19 paid holidays + unlimited PTO + generous parental leave.
  - Free gyms, Calm app subscriptions, unlimited mental‑health access, pet insurance.
- **Engineering Culture**: “Impossible is just a challenge” – fast iteration, cross‑functional teams, blend of startup mentality and aerospace/defense experience. Alumni from SpaceX, Anduril, Northrop Grumman, Lockheed Martin.
- **Growth**: 40 active job postings (monthly +53.8%, yearly +100%); rapid headcount increase and major contracts signal stability and scaling.

## Sources
1. [Epirus Website](https://www.epirusinc.com/)
2. [Epirus About Page](https://www.epirusinc.com/about)
3. [Epirus Careers Page](https://www.epirusinc.com/careers)
4. [Epirus LinkedIn](https://www.linkedin.com/company/epirus)

## Other roles at Epirus

- [Principal Mechanical Engineer](https://feeny.ai/job/principal-mechanical-engineer-epirus-torrance-m41khky8qcsm) — Torrance, CA
- [Senior Manufacturing Engineer](https://feeny.ai/job/senior-manufacturing-engineer-epirus-torrance-r4fh3ss6v2vw) — Torrance, CA
- [Senior Technical Project Manager](https://feeny.ai/job/senior-technical-project-manager-epirus-torrance-qeg5h238qdw5) — Torrance, CA
- [Director of Systems Engineering](https://feeny.ai/job/director-of-systems-engineering-epirus-torrance-gg57csetxrza) — Torrance, CA
- [Director International Programs & Commercialization](https://feeny.ai/job/director-international-programs-commercialization-epirus-torrance-ag9wv01dw6x1) — Torrance, CA
- [Program Manager - Product Demonstrations](https://feeny.ai/job/program-manager-product-demonstrations-epirus-torrance-3k93akgc3nsb) — Torrance, CA
- [Vice President Marketing & Communications](https://feeny.ai/job/vice-president-marketing-communications-epirus-torrance-qbtntg51758d) — Torrance, CA / Washington, DC
- [Principal Category Manager - PCBA](https://feeny.ai/job/principal-category-manager-pcba-epirus-torrance-1k5hda4hxgwh) — Torrance, CA
- [Lead, Production](https://feeny.ai/job/lead-production-epirus-torrance-111sdj6raphs) — Torrance, CA
- [FPGA Engineer](https://feeny.ai/job/fpga-engineer-epirus-torrance-2w0eqpwm84xs) — Torrance, CA