---
title: 'Staff Manufacturing Engineer, DFM at Radiant Industries'
canonical: 'https://feeny.ai/job/staff-manufacturing-engineer-dfm-radiant-industries-el-segundo-k8877pb0k2ac'
type: 'job'
last_seen: '2026-10-12'
---

# Staff Manufacturing Engineer, DFM at Radiant Industries

- **Company:** [Radiant Industries](https://feeny.ai/companies/radiant-industries)
- **Location:** El Segundo, CA
- **Compensation:** $160k–$210k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-10-03
- **Last confirmed live:** 2026-10-12
- **Apply:** https://jobs.ashbyhq.com/radiant-industries/472a87af-8775-4827-81af-23d67facaa95

## Job description

## About Radiant

Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.

## About the Role

Radiant is seeking a Staff Manufacturing Engineer to help transition Kaleidos from a first-of-a-kind reactor build into a repeatable, scalable production system. With the initial Kaleidos reactor build complete, Radiant is now applying what we learned through design, fabrication, assembly, integration, and test to the next generation of the product. This includes reducing mass and part count, improving manufacturability and assembly, increasing production repeatability, and developing the processes, tooling, equipment, suppliers, and quality controls required to manufacture reactors at scale. In this role, you will work closely with design, quality, test, supply chain, and operations engineers to influence hardware from the earliest stages of design through fabrication and final assembly. You will own manufacturing processes for critical reactor components, mechanisms, structures, and integrated assemblies, ensuring designs can be built safely, reliably, and repeatedly while meeting demanding performance and quality requirements. You will be expected to identify manufacturing constraints early, drive DFM and DFA into the product, develop and qualify production processes, and close the loop between engineering intent and what happens on the factory floor. The ideal candidate is equally comfortable reviewing a CAD model with a design engineer, developing a fixture or manufacturing process, troubleshooting a build issue, working with a supplier, and using production data to improve the next iteration of the product. This is a hands-on engineering role with significant influence over how Kaleidos evolves from a development program into a manufacturable product.

## Responsibilities & Duties

- Own manufacturing and inspection processes for critical Kaleidos components, mechanisms, structures, and assemblies from design release through fabrication, integration, and final acceptance.
- Partner closely with design engineers to drive design for manufacturability and assembly (DFM/DFA), influencing hardware to reduce mass, part count, manufacturing complexity, assembly time, and production risk.
- Evaluate designs for manufacturability, inspectability, tolerance stack-up, tooling access, assembly sequence, subsystem integration, and final reactor assembly.
- Develop, qualify, document, and continuously improve manufacturing processes for complex mechanical hardware and integrated assemblies.
- Translate engineering drawings, CAD models, requirements, and specifications into manufacturing plans, work instructions, inspection strategies, tooling requirements, and production controls.
- Define fabrication and assembly approaches for new hardware, including process selection, sequencing, make-versus-buy decisions, and inspection methodology.
- Design and develop production tooling, fixtures, assembly aids, lifting equipment, and other manufacturing equipment required to safely and repeatably build reactor hardware.
- Partner with Quality and Test Engineering to establish inspection and acceptance strategies, resolve build and test issues, and incorporate lessons learned into future hardware and processes.
- Investigate manufacturing defects, nonconformances, and assembly issues using structured root-cause analysis and implement durable corrective actions.
- Identify, evaluate, and develop suppliers for critical components and manufacturing processes, working directly with suppliers to mature fabrication methods and resolve technical issues.
- Identify and implement capital equipment, machinery, and production infrastructure needed to support current builds and future production volumes.
- Support hands-on build, integration, and troubleshooting activities while identifying opportunities to improve repeatability, throughput, yield, labor content, and production scalability.

Required Qualifications & Skills

- Bachelor’s degree in mechanical engineering, manufacturing engineering, aerospace engineering, or a related technical discipline from an accredited institution.
- 8+ years of experience manufacturing complex mechanical hardware in a production, development, or high-reliability engineering environment.
- Demonstrated experience partnering with design engineering to influence hardware through DFM/DFA.
- Experience owning manufacturing processes from development through qualification and production implementation.
- Strong understanding of mechanical fabrication and assembly processes, including machining, joining, fastening, alignment, tolerance control, and inspection.
- Strong ability to interpret engineering drawings, CAD models, specifications, and Geometric Dimensioning & Tolerancing (GD&T).
- Experience developing manufacturing documentation such as work instructions, process specifications, routings, and inspection plans.
- Experience troubleshooting manufacturing and assembly problems, performing root-cause analysis, and implementing corrective actions.
- Demonstrated ability to make practical engineering tradeoffs across manufacturability, quality, cost, schedule, performance, and risk.
- Experience working directly with technicians, machinists, fabricators, inspectors, and operators in a hands-on manufacturing environment.
- Strong written and verbal communication skills and the ability to work effectively across design, quality, test, supply chain, and operations teams.

## Preferred Qualifications & Skills

- Master’s degree in mechanical engineering, manufacturing engineering, or a related technical discipline.
- Experience transitioning complex hardware from prototype or development builds into repeatable or scaled production.
- Experience manufacturing highly engineered hardware in aerospace, energy, nuclear, automotive, defense, turbomachinery, or another high-reliability industry.
- Experience with precision machining, mechanical joining, dimensional inspection, and non-destructive evaluation methods.
- Experience with tolerance analysis and manufacturing or assembly strategies for tightly controlled interfaces.
- Experience designing custom fixtures, tooling, assembly equipment, or other production hardware.
- Experience with process qualification, first article inspection, statistical process control, or production quality systems.
- Experience developing suppliers for low-volume, high-complexity hardware.
- Experience with manufacturing automation, production equipment, or semi-automated assembly systems.
- Demonstrated ability to reduce part count, mass, assembly time, production complexity, or manufacturing cost without compromising product performance.

Additional Requirements

- Must be willing to support extended hours and weekends when necessary to meet critical program milestones.
- Must work 100% onsite at Radiant’s El Segundo headquarters.

## Benefits and Perks

- Stock: Substantial incentive stock plan for all full-time employees.
- Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
- One Medical: Sponsored memberships for employees and their dependents.
- Vision: 100% top tier plan coverage + 50% for dependents.
- Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
- Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
- 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
- Daily catered lunch. Free snacks and drinks.
- Flexible PTO policy. Remote workday allocation.
- Company and team-bonding events, happy hours and in-person camaraderie.
- Beautiful El Segundo headquarters close to the Pacific Ocean.

Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.

The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com.

We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.

## About Radiant Industries

## Company Overview
- **One-liner**: Radiant Industries is building the world’s first mass‑produced, portable nuclear microreactor (Kaleidos) to replace diesel generators with zero‑emission, resilient power for remote sites, hospitals, data centers, and military installations.
- **Entity Type**: Private (Series D – $300M raised in December 2025, led by Lockheed Martin Ventures)
- **Headquarters**: El Segundo, California, USA
- **Founded**: 2020 (some sources list 2019)
- **Founders**: Not publicly disclosed

## Core Business
- **Primary industry**: Nuclear electric power generation / clean energy
- **Target customers**: B2B – remote communities, hospitals, data centers, military bases, industrial sites that currently rely on diesel generators or unstable grids
- **Mission**: To bring one of the world’s first factory‑constructed microreactors to market, providing portable, zero‑emissions power anywhere, anytime.

## Products & Services
- **[Kaleidos Microreactor](https://www.radiantnuclear.com/)**: A 1 MW electric / 1.9 MW thermal portable nuclear reactor packaged in a shipping container. It uses helium gas cooling and TRISO fuel (meltdown‑proof ceramic uranium particles). Delivered by truck or aircraft, installed without site excavation, and can reach full power the next day. After 5+ years the entire container is returned to the factory for refueling; up to four fuel cycles yield a 20‑year product lifetime. Customers purchase via Power Purchase Agreements (PPAs) or direct unit sales.

## Market Standing
- **Valuation / Market Cap**: Not disclosed
- **Key Metric**: Total funding raised – **$622.6M** (as of early 2026)
- **Notable Investors/Partners**: Andreessen Horowitz (led Series B), Lockheed Martin Ventures (led Series D), plus 18+ other investors across Series B, C, and D rounds
- **Growth Signals**:
  - Headcount grew **141% YoY** to 157 employees (as of mid‑2026)
  - 64 active job postings (+178% YoY)
  - Plans to test its development reactor in **2026** – which would be the first new commercial reactor design to achieve a fueled test in over 50 years
  - Initial customer deployments targeted for **2028**
  - SBIR Phase II awards from the U.S. Air Force for nuclear microreactor installation energy resilience

## Competitive Advantages
- **Portability & speed**: Delivered in a standard shipping container, installed in one day, no on‑site water or excavation needed.
- **Passive safety**: TRISO fuel is meltdown‑proof; the core is cooled by natural convection (air jacket) without pumps.
- **Factory‑built, factory‑refueled**: No nuclear waste or infrastructure left on site after the container is returned.
- **High energy density**: Over 110× the energy density of existing diesel systems.
- **Fleet monitoring**: Hundreds of units can be monitored 24/7 from a centralized control center.

## Strategic Focus
- Complete fueled testing of the Kaleidos prototype in 2026.
- Secure regulatory approvals (special nuclear material license, Part 7 license).
- Scale manufacturing for initial customer deployments beginning in 2028.
- Expand into military, commercial, and humanitarian markets (disaster relief, remote microgrids, backup power).

## Why Work Here
- **Culture & mission**: High‑impact climate tech – directly replacing diesel generators with clean nuclear power. Rated 5.0/5.0 on employer reviews (5 reviews) with strong scores for culture (4.7) and career growth (4.8).
- **Work location**: On‑site in El Segundo, CA (steps from the Pacific Ocean, near downtown). Employees work from a physical office.
- **Perks**: Company equity, relocation assistance, free daily meals, commuter benefits, onsite parking, generous parental leave, family medical leave, onsite Mother’s Room, dental/health insurance, FSA.
- **Diversity & inclusion**: Mandated unconscious bias training; hiring practices that promote diversity.
- **Tech stack**: React, TypeScript, Python, C++, C#, Kubernetes, Docker, PostgreSQL, AWS, Ansys, SolidWorks, Altium, and more. Engineers work on cutting‑edge nuclear, mechanical, and embedded systems.
- **Growth trajectory**: 141% headcount growth in the past year; 64 open roles across engineering, regulatory, supply chain, and operations.

## Sources
1. [radiantnuclear.com](https://www.radiantnuclear.com/) – Product details, specs, deployment model
2. [builtin.com](https://builtin.com/company/radiant) – Company overview, perks, culture, tech stack, reviews
3. [linkedin.com](https://www.linkedin.com/company/r-a-d-i-a-n-t) – Funding, headcount, employee growth, locations, key executives
4. [sbir.gov](https://www.sbir.gov/portfolio/1655711) – SBIR awards, Phase II contracts with U.S. Air Force
5. [jobs.ashbyhq.com](https://jobs.ashbyhq.com/radiant-industries) – Current open positions (64+)

## Other roles at Radiant Industries

- [Executive Assistant & Office Coordinator](https://feeny.ai/job/executive-assistant-office-coordinator-radiant-industries-washington-587stxsr4v2m) — Washington, DC
- [Mechanisms Engineer](https://feeny.ai/job/mechanisms-engineer-radiant-industries-el-segundo-k6b336c99d6n) — El Segundo, CA
- [Reactor Operations Engineer](https://feeny.ai/job/reactor-operations-engineer-radiant-industries-el-segundo-bqdf0nbd2byh) — El Segundo, CA
- [Indirect Procurement Associate](https://feeny.ai/job/indirect-procurement-associate-radiant-industries-el-segundo-88rxwtyxe1ja) — El Segundo, CA
- [Strategic Sourcing Manager](https://feeny.ai/job/strategic-sourcing-manager-radiant-industries-el-segundo-dnr7vm0d3fqv) — El Segundo, CA
- [Supply Chain Associate](https://feeny.ai/job/supply-chain-associate-radiant-industries-el-segundo-hr2fv9dd58nt) — El Segundo, CA
- [Senior Material Planner](https://feeny.ai/job/senior-material-planner-radiant-industries-el-segundo-t3v7gd7e4pw5) — El Segundo, CA
- [Senior Manufacturing Engineer, DFM](https://feeny.ai/job/senior-manufacturing-engineer-dfm-radiant-industries-el-segundo-hzrkyha5we4b) — El Segundo, CA
- [Staff Nuclear Engineer](https://feeny.ai/job/staff-nuclear-engineer-radiant-industries-el-segundo-xj3a1h5w0dvf) — El Segundo, CA
- [Indirect Procurement Manager](https://feeny.ai/job/indirect-procurement-manager-radiant-industries-el-segundo-xvg0ber6d94z) — El Segundo, CA