Jobs in the United States

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Added 10 mins ago
Senior Software Engineer - Labor Management Forecasting (Hybrid)
Publix Super Markets, Inc.
Lakeland, FL
Build and enhance Python-based business logic, algorithms, scripts, and data-processing solutions.
Added 37 mins ago
Senior Perception AI Engineer - Autonomous Vehicles
NVIDIA USA
CA
…map. Our team builds the online mapping system that turns raw data from multiple sensors into an accurate, continuously updated 3D model of the driving environment. This model captures…
Added 38 mins ago
Semantic Data and AI Engineer
Enterprise Knowledge
Remote, United States
Enterprise Knowledge (EK) is hiring a full-time Semantic Data and AI Engineer to join our growing Semantic Engineering and AI Practice. In this role, you will be responsible for designing…
Added 40 mins ago
AC
CIVIL ENGINEER
Air Combat Command
Shaw AFB, SC
- $89,508 to $116,362 USD / year
The primary purpose of this position is to serve as a professional civil engineer, performing design, project programming and construction management/monitoring duties in support of a…
Added 59 mins ago
FA
Aviation Safety Assistant
Federal Aviation Administration
Memphis, TN
- $38,791 to $56,039 USD / year
…Assurance System environment which includes obtaining background data, preparing reports, reviewing/interviewing applicants, processing certificates, and maintaining…
Added 1 hour ago
Vectra AI Cloud Native Engineer - Active TS/SCI with CI Poly
ENS Solutions, LLC
Reston, VA
We are seeking a Cloud‑Native Vectra AI Engineer to design, integrate, and optimize Vectra AI Detect/Recall and supporting telemetry pipelines across cloud platforms (AWS, Azure, GCP). This…
Added 1 hour ago
Vectra AI Cloud Native Engineer - Active TS/SCI with CI Poly
ENS Solutions, LLC
Washington, DC
We are seeking a Cloud‑Native Vectra AI Engineer to design, integrate, and optimize Vectra AI Detect/Recall and supporting telemetry pipelines across cloud platforms (AWS, Azure, GCP). This…
Added 1 hour ago
Software Engineer Intern (Summer 2027)
ENFOS, Inc.
Durham, NC
…work across frontend applications, backend services, APIs, data processing, document management, AI-enabled capabilities, or platform infrastructure depending on your technical strengths…
Added 1 hour ago
Software Engineer Intern (Summer 2027)
ENFOS, Inc.
Chicago, IL
…work across frontend applications, backend services, APIs, data processing, document management, AI-enabled capabilities, or platform infrastructure depending on your technical strengths…
Added 1 hour ago
Infrastructure Operations Engineer
Jobgether
Remote, United States
This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for an Infrastructure Operations Engineer based in United States.
Added 1 hour ago
UA
Civil Engineer (Hydraulics)
U.S. Army Corps of Engineers
Jacksonville, FL
- $106,437 to $138,370 USD / year
…global, regional, and local ocean circulation models | Develop data collection scopes of work and independent government estimates for project needs related to topographic/bathymetric data…
Added 1 hour ago
NN
Nuclear Engineer (Deputy Director, Reactor Refueling Division)
National Nuclear Security Administration
Washington, DC
- $203,124 to $209,600 USD / year
As a Nuclear Engineer (Deputy Director, Reactor Refueling Division), you will:
Added 1 hour ago
AC
GENERAL ENGINEER
Air Combat Command
Shaw AFB, SC
- $89,508 to $116,362 USD / year
The primary purpose of this position is: To serve as a professional general engineer, performing design, project programming, construction management/monitoring duties and improvement…
Added 1 hour ago
J
Super SWE - AI Factory
Jobgether
Remote, United States
- $200,000 to $275,000 USD / year
We are seeking an exceptional, AI-native software engineer to help build the next generation of autonomous engineering systems. In this role, you will develop an internal AI factory,…
Added 1 hour ago
Senior Software Engineer, Cloud Applications
Jobgether
Remote, United States
As a Senior Software Engineer, Cloud Applications, you will play a critical role in designing and building the cloud infrastructure and backend systems that power a large-scale customer…
Added 1 hour ago
J
Senior Security Engineer, Infrastructure Security
Jobgether
Remote, United States
- $160,000 to $210,000 USD / year
…and next steps. Our partner is looking for a Senior Security Engineer, Infrastructure Security based in the United…
Added 1 hour ago
Applied AI Engineer, Applied AI
Snowplow
Remote, United States
Snowplow is the real-time customer context layer that collects, validates, enriches, and delivers behavioral data for advanced analytics, ML, and AI agent decisioning. Snowplow's event…
Added 1 hour ago
Forward Deployed Engineer, Applied AI
Snowplow
Remote, United States
Snowplow is the real-time customer context layer that collects, validates, enriches, and delivers behavioral data for advanced analytics, ML, and AI agent decisioning. Snowplow's event…
Added 1 hour ago
EI
RF Test & Automation Engineer
Elve Inc
San Francisco, CA
- $85,000 to $150,000 USD / year
Develop and maintain test software, including data acquisition, processing, logging, and reporting
Added 1 hour ago
EI
Test Engineer
Elve Inc
Davis, CA
- $85,000 to $125,000 USD / year
Coding experience, particularly Python (for automation and data-processing/analysis), ideally with hardware communication
Added 1 hour ago
RF Design Engineer
Elve Inc
Davis, CA
Coding experience, particularly Python (for automation and data-processing/analysis), ideally with hardware communication
Added 2 hours ago
Robotics Engineer
Valknut Automation
Lake Orion, MI
As a Contract Robotics Engineer, you will design, develop, and implement robotic systems tailored to complex industrial automation requirements. Youll be responsible for integrating…
Added 2 hours ago
Senior Software Engineer - Video
Eluvio
Berkeley, CA
Eluvio is a highly-focused and ambitious team of systems/networking/application/video software engineers, data scientists, and security experts working together to implement the vision of…
Added 2 hours ago
J
Software Development Engineer in Test (SDET)
Jobgether
Remote, United States
- $135,000 to $160,000 USD / year
…next steps. Our partner is looking for a Software Development Engineer in Test (SDET) based in the United…
Added 2 hours ago
J
Senior ML Engineer
Jobgether
Remote, United States
- $159,000 to $195,000 USD / year
This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior ML Engineer based in the United States.

Radiant Industries

Staff Nuclear Engineer

El Segundo, CA, United States

$195,713 to $262,500 USD / year

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Job details

Pay: $195,713 to $262,500 USD / year
Experience: 8+ years of relevant nuclear engineering experience across reactor design, analysis, testing, licensing, safety, or operations.
Posting language: English
Posted: Nov 6, 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 Staff Nuclear Engineer to provide technical expertise across the nuclear design and analysis of Kaleidos. You will work across core physics, neutron and radiation transport, shielding, activation and dose, thermal-hydraulics, safety analysis, instrumentation and controls, reactor operations, and regulatory evaluations to solve multidisciplinary reactor design challenges.

This role combines deep hands-on analysis with technical ownership across major nuclear engineering workstreams. You will lead complex projects from requirements definition and early design trades through model development, analysis, verification and validation, testing, and regulatory documentation. You will help establish analytical methods and technical standards, mentor engineers, and serve as a key technical interface between nuclear analysis and the broader reactor engineering organization.

The ideal candidate brings deep technical judgment, strong engineering fundamentals, and the ability to translate complex nuclear analysis into practical reactor design decisions. You should be comfortable operating with significant technical autonomy, working across disciplines, and driving difficult engineering problems through closure.

Responsibilities & Duties

Provide technical leadership across reactor physics, core performance, shielding, dose and activation, thermal-hydraulics, safety analysis, I&C, and reactor operations.
Own complex nuclear engineering projects from requirements capture and design iteration through model development, analysis, technical review, and final documentation.
Perform and guide analyses of criticality, reactivity control, shutdown margin, power distribution, depletion, temperature feedback, radiation transport, dose, activation, and shielding performance.
Develop, review, and improve high-fidelity neutron and radiation transport models used to support reactor design, safety, testing, and regulatory evaluations.
Translate analytical results into actionable requirements and design decisions affecting the core, shielding, control systems, instrumentation, fluid systems, structures, and surrounding hardware.
Lead multidisciplinary technical trades and evaluate the interaction between nuclear performance, thermal behavior, mechanical design, controls, operations, manufacturability, and safety.
Establish and improve rigorous practices for model verification and validation, peer review, configuration control, uncertainty evaluation, and technical documentation.
Ensure analytical assumptions, limitations, uncertainties, margins, and conclusions are clearly documented and technically defensible.
Develop analytical methods, workflows, and tools that improve the accuracy, efficiency, and scalability of Radiant’s nuclear engineering capability.
Collaborate with reactor systems, thermal, mechanical, electrical, test, operations, safety, and regulatory teams to resolve multidisciplinary design challenges.
Work with the regulatory organization to translate applicable nuclear standards and requirements into analysis plans, design criteria, calculation packages, and verification activities.
Support reactor testing and startup by defining analysis needs, instrumentation requirements, acceptance criteria, and methods for comparing predicted and measured performance.
Provide technical mentorship and review for engineers across nuclear design and analysis activities.
Identify technical risks, develop practical mitigation strategies, and drive complex nuclear engineering problems through closure.
Communicate technical status, risks, decisions, and recommendations clearly to engineering teams and company leadership.

Required Qualifications & Skills

Bachelor’s degree in nuclear engineering or a related technical discipline from an accredited institution.
8+ years of relevant nuclear engineering experience across reactor design, analysis, testing, licensing, safety, or operations.
Demonstrated experience owning complex nuclear engineering projects involving multiple technical disciplines and stakeholders.
Deep knowledge of neutron transport theory, Monte Carlo simulation methods, nuclear data, and statistical convergence.
Professional experience developing and applying MCNP, OpenMC, or comparable neutron and radiation transport models.
Strong understanding of reactor physics concepts, including criticality, reactivity coefficients, depletion, power distribution, shutdown margin, neutron and gamma transport, and uncertainty analysis.
Experience translating analytical results into reactor design decisions, technical requirements, safety conclusions, or regulatory documentation.
Experience developing or reviewing technically rigorous analysis methodologies, models, calculation packages, or engineering standards.
Familiarity with model verification and validation, configuration control, peer review, and nuclear software quality practices.
Demonstrated ability to operate independently on technically complex problems and drive work from definition through technical closure.
Strong written and verbal communication skills, including the ability to explain complex analyses, assumptions, uncertainties, and technical conclusions to multidisciplinary teams.

Preferred Qualifications & Skills

Master’s degree or Ph.D. in nuclear engineering or a related technical discipline.
Subject-matter expertise in safety analysis, shielding, radiation dose and activation, instrumentation and controls, reactor operations, thermal-hydraulics, or radioactive-material transportation.
Experience with high-temperature gas-cooled reactors, microreactors, advanced reactors, or first-of-a-kind nuclear systems.
Experience with SCALE, Serpent, Shift, Griffin, MOOSE-based applications, or similar nuclear analysis tools.
Proficiency with Python or another language used for simulation automation, model generation, and analysis post-processing.
Experience with coupled neutronics and thermal-hydraulics or other multiphysics analyses.
Familiarity with DOE authorization processes, NRC licensing, nuclear industry codes and standards, or regulatory safety analysis.
Experience supporting reactor testing, commissioning, startup, or operational readiness.
Experience developing analytical methods, technical standards, or nuclear engineering capabilities within a growing engineering organization.
Demonstrated experience mentoring engineers and providing technical review across complex engineering programs.

Additional Requirements

Must be mission driven and willing to support extended hours when needed.
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.
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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