---
title: 'Principal Mechanical Engineer (Structural Design and Analysis) at Epirus'
canonical: 'https://feeny.ai/job/principal-mechanical-engineer-structural-design-and-analysis-epirus-torrance-q2aavt73y488'
type: 'job'
last_seen: '2026-10-30'
---

# Principal Mechanical Engineer (Structural Design and Analysis) at Epirus

- **Company:** Epirus
- **Location:** Torrance, CA
- **Compensation:** $138k–$193k
- **Posted:** 2026-10-28
- **Last confirmed live:** 2026-10-30
- **Apply:** https://www.epirusinc.com/open-roles?gh_jid=6235960004

## 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 an experienced structural analysis engineer to innovate on the next generation of HPM products. In this role, you will work closely with a talented engineering team to design & analyze cutting edge electronic and mechanical assemblies to survive in harsh environments. Ideal candidates will have experience following their designs / analyses through its complete lifecycle from conceptualization through test and verification.

Responsibilities:

- Design / analyze structures for mounting RF phased arrays and other electronic packages
- Perform structural finite element analysis (FEA) on complex mechanical structures and electronic assemblies for a range of solution and load types, including static, modal, and structural dynamics (vibration and shock).
- Build finite element models and perform hand calculations to verify structural integrity across Epirus’s product lines.
- Provide mentoring and serve as mechanical design / analyst lead on product design teams
- Collaborate with a cross-functional team to develop requirements, design, and build electromechanical systems that survive harsh environments encountered during operation and transport

Basic Qualifications:

- BS degree in Mechanical, Aerospace, Structural or similar engineering field.
- 8+ years of experience in structural/stress design & analysis of metallic structures.
- Expert level comfort with Finite Element Analysis and structural hand calculations.
- Experience with structural analysis and pre/post processing software packages such as Nastran, FEMAP, Ansys, Patran or equivalent.
- Experience analyzing systems under static loading, shock, and vibrational environments including random vibration.
- Experience with CAD and practical application of GD&T.
- Experience with structural test and qualification of mechanical systems.

Preferred Skills and Experience:

- Experience performing stress analysis of electronic systems such as circuit card assemblies.
- Experience designing / analyzing actuated mechanical systems including azimuth and elevation pointing mechanisms.
- Good written and oral communication skills
- Collaborative; capable of working across all levels of the organization
- Organized; comfortable working in a fast-paced, ever-changing environment
- 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: $138,000—$193,000 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

- [Senior Principal Electrical Engineer- Power Systems](https://feeny.ai/job/senior-principal-electrical-engineer-power-systems-epirus-torrance-nk249ysp4arp) — Torrance, CA
- [Senior Systems Engineer- Development](https://feeny.ai/job/senior-systems-engineer-development-epirus-torrance-067vfdt9c5t4) — Torrance, CA
- [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
- [Principal Harness Design Engineer](https://feeny.ai/job/principal-harness-design-engineer-epirus-torrance-9jh8jpd2byr8) — Torrance, CA
- [Vice President Marketing & Communications](https://feeny.ai/job/vice-president-marketing-communications-epirus-torrance-qbtntg51758d) — Torrance, CA / Washington, DC