Jobs in the United States

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Added 2 mins ago
Senior Software Engineer - Full Stack (TS Clearance)
Andesite
WA · McLean, VA
At Andesite, we are building a new product for technical operators in the national security space. As a full stack engineer, you will be responsible for developing our application backend…
Added 2 mins ago
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Principal Power Systems Engineer
Oracle
Jefferson City, MO
- $114,600 to $234,600 USD / year
The ideal candidate has strong power-systems engineering experience, particularly in utility interconnection, substations, energy storage, on-site generation, and large-load infrastructure.
Added 2 mins ago
Principal Engineer, Cloud Software
LI-COR
United States
The Principal Engineer, Cloud Software provides technical direction and hands-on engineering for LI-COR Environmental's connected products and cloud platforms. This individual contributor…
Added 3 mins ago
Infrastructure Engineer (Active Secret Clearance)
Akima, LLC
Alexandria, VA
SUVI Global Services is looking for an Infrastructure Engineer to support IT across all DoD OIG networks. The position will help support the OIG's on-prem and cloud infrastructure, work on…
Added 3 mins ago
Software Engineer- AI, Autonomy and Platform Development
LEIDOS, INC.
Reston, VA · Huntsville, AL · San Diego, CA
Software Engineer – AI, Autonomy & Platform Development
Added 4 mins ago
Test Engineer II
Blue Origin Personnel, LLC
United States
…on designing maintainability and operability into our test infrastructure from the start. This position requires close attention to detail and a strong commitment to safe, repeatable…
Added 7 mins ago
Northrop Grumman (SkillBridge) - Principal Network Cloud Communications
Northrop Grumman
Redondo Beach · Melbourne · Linthicum Heights · Rolling Meadows
…seeking a Principal Network Communications to support its IT Infrastructure & Operations organization's Classified Solutions team. The selected candidate will support the design,…
Added 7 mins ago
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2027 Intern Engineer - Product Support
Northrop Grumman
Oklahoma City
- $17.5 to $39.25 USD / hour
Assist in gathering data for facilities, tooling, and infrastructure needed to support B‑2 maintenance at Oklahoma City and other sites.
Added 8 mins ago
Sentinel - Sr Principal Systems Engineer - 18016
Northrop Grumman
Roy
Northrop Grumman Defense Systems is seeking a Principal / Sr. Principal Systems Engineer. This opening is in Roy, UT and will support the Sentinel Program. Northrop Grumman supports the Air…
Added 8 mins ago
Sentinel Project Change Engineering Section Manager 2 - 14050-1
Northrop Grumman
Roy
…Airborne Launch Control Systems, Launch Facilities, and associated…
Added 8 mins ago
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Fraud Analytics Engineer
Experian
United States
- $103,669 to $179,693 USD / year
We're looking for an Analytics Engineer that operates at the intersection of data engineering, infrastructure, and machine learning.
Added 11 mins ago
Principal HVAC Engineer
Worley
Houston, TX · Houston
…our workforce to become experts in today's low carbon energy infrastructure and technology. Whatever your ambition, there's a path for you…
Added 12 mins ago
AWS Security Operations/Incident Response Engineer, US Amazon Dedicated Cloud Security
Amazon.com Services LLC
Herndon, VA
The AWS Security Incident Response team is seeking a focused Security Engineer who can take on a leadership role in responding to security issues in support of our National Security…
Added 12 mins ago
Software Development Engineer, US Amazon Dedicated Cloud Security
Amazon.com Services LLC
Herndon, VA
As a Software Development Engineer (SDE), you will be responsible for the development, operations, and overall health and security of the critical services we support, providing excellent…
Added 12 mins ago
Software Development Engineer, US Amazon Dedicated Cloud Security
Amazon.com Services LLC
Herndon, VA
As a Software Development Engineer (SDE), you will be responsible for the development, operations, and overall health and security of the critical services we support, providing excellent…
Added 12 mins ago
Sales Engineer - Chicago (Majors)
Cyera
Chicago, IL
…thought possible. That foundation is now the essential AI trust infrastructure for the Fortune 1000. We’re hiring mission-driven talent to put those leaders at the center of our…
Added 13 mins ago
Facilities Support Specialist - Huntsville
Auburn University
Auburn University, AL
…University facilities in Huntsville. The position assists the Campus Engineer with the oversight of facility operations, routine and preventive maintenance, capital improvement activities,…
Added 13 mins ago
Sr. Software Engineer, Pretraining Data
SpaceXAI
Palo Alto, CA
…You'll work on large-scale crawling, data platform, and pipeline infrastructure, turning raw dumps into the datasets our models train on, and making iteration with researchers fast and…
Added 14 mins ago
TT
Founding Full-Stack Engineer
True Talent Solutions Partners
San Francisco, CA
- $180,000 to $240,000 USD / year
On-site in San Francisco, with a minimum of five days per week on-site.
Added 14 mins ago
TT
Founding Forward Deployed Engineer
True Talent Solutions Partners
New York, NY
- $180,000 to $250,000 USD / year
On-site, five days per week in New York, New York, United States.
Added 14 mins ago
UG
Senior Data Engineer
UnitedHealth Group
Eden Prairie, MN
- $91,700 to $163,700 USD / year
Added 16 mins ago
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Senior Engineer Core Infrastructure
JetBlue Airways Corporation
Salt Lake City, UT · Washington, DC · Orlando, FL · Long Island City, NY
- $105,600 to $150,400 USD / year
The Senior Core Infrastructure Engineer – is focused on ensuring the creation and management of Infrastructure including managing operational stability, performance, and cost-efficiency of…
Added 17 mins ago
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Senior Data Engineer
Expression
Shirlington, VA
- $180,000 to $200,000 USD / year
Expression is seeking an experienced Senior Data Engineer to design, develop, and integrate secure enterprise data services supporting advanced Artificial Intelligence (AI) and Large…
Added 18 mins ago
Senior Terrestrial Mechanical Design Engineer, Controls
Varda Space Industries
El Segundo, CA
The Senior Mechanical Design Engineer builds bespoke test infrastructure that qualifies spaceflight hardware for orbit. They design, build, and own sophisticated ground support equipment…
Added 18 mins ago
Senior Terrestrial Automation & Controls Engineer
Varda Space Industries
El Segundo, CA
The Senior Automation & Controls Engineer builds bespoke test infrastructure that qualifies spaceflight hardware for orbit. They design, build, and own sophisticated ground support…

Radiant Industries

Mechanical Engineer, Electrical Integration

El Segundo, CA, United States

$124,500 to $172,725 USD / year

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Job details

Pay: $124,500 to $172,725 USD / year
Posting language: English
Posted: Nov 10, 2026

Original job description

ABOUT RADIANT

Radiant is an El Segundo, CA-based company building the world's only mass-produced, transportable nuclear microreactors. The U.S. grid is under growing strain, with power demand accelerating, driving higher utility costs, rising carbon emissions, and interconnection backlogs. Radiant has a solution, transportable, on-site power. Our first reactor, Kaleidos, is 1 megawatt: small enough to be factory-built, transported by land, sea, or air, and deployed wherever power is needed. 1 MW can power 1000 homes for five years. Ship it back and we refuel for a 20 year operating life. We made energy a product that can be used for critical infrastructure like military bases, data centers, hospitals, and remote sites, as well as the commercial main street businesses that keep America running. Founded in 2020, Radiant is under contract to deliver power to the U.S. Army, Navy and Air Force and has signed pre-order agreements with Equinix, with deployments beginning in 2028.

ABOUT THE ROLE

Radiant is seeking a Mechanical Engineer to support the design and integration of electrical components and subsystems in a fast-paced startup environment. You’ll work alongside experienced mechanical and electrical engineers to solve challenging problems in packaging, thermal management, structural design, and system integration for advanced hardware. This role offers hands-on exposure to end-to-end hardware development from CAD and analysis through build, test, and validation.

RESPONSIBILITIES & DUTIES:

Support the mechanical design and ownership of electrical components and subsystems, including:
Mechanical design of electrical assemblies such as control panels, enclosures, brackets, mounts, and supports.
Cable and wiring harness routing, retention, strain relief, bend radius compliance, and serviceability considerations.
Packaging of sensors, actuators, connectors, and electrical hardware within constrained assemblies.
3D CAD modeling and 2D drawing creation using Siemens NX, including tolerance stack-ups and GD&T basics.
Perform first-order load calculations (static, shock, vibration) to support structural design decisions.
Conduct thermal analysis and heat-transfer assessments for electrical components, enclosures, and assemblies.
Support selection of materials, fasteners, and finishes appropriate for electrical, thermal, and environmental requirements.
Participate in system integration, troubleshooting, and validation activities alongside electrical and systems engineers.
Collect and interpret technical requirements and provide clear, constructive feedback across mechanical, electrical, software, and systems disciplines.
Perform trade studies and first-order analyses to evaluate design options and constraints.
Generate and maintain design documentation to support Design for Manufacturing (DFM), assembly, and serviceability.
Support subassembly design, coordinate with manufacturing, and assist with build and test schedules.

REQUIRED QUALIFICATIONS & SKILLS:

Bachelor’s degree in Mechanical Engineering or a closely related field from an accredited institution.
3+ Years of professional hands-on mechanical design experience.
Experience using Siemens NX or similar 3D CAD tools.
Familiarity with mechanical design of electrical assemblies, including enclosures, brackets, and harness routing principles.
Basic understanding of structural mechanics, load paths, and first-order stress calculations.
Knowledge of thermal analysis, heat transfer, and thermal management concepts.
Ability to read and create mechanical drawings, including dimensions and tolerances.
Strong communication skills and ability to collaborate in a multidisciplinary engineering environment

DESIRED QUALIFICATIONS & SKILLS:

5+ years of professional hands-on mechanical design experience.
Mechanical design for high-reliability or harsh environments (nuclear, aerospace, defense, or industrial), including thermal cycling, shock, vibration, or radiation exposure.
Experience with FEA or CFD tools for structural and thermal analysis beyond first-order hand calculations.
Hands-on experience supporting build, integration, and test on the floor, including design iteration based on manufacturing feedback.

ADDITIONAL REQUIREMENTS:

Must be willing to work extended hours and weekends as necessary to accomplish our mission.
Must work 100% onsite at El Segundo HQ.

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.
Nuclear Engineering Certificate Program: 100% covered educational program with Penn State University, for eligible employees, to rapidly upscale into nuclear.
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 full-time 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.

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Jobs in the United States