Jobs in the United States

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Added 3 mins ago
TC
Civil Engineer
TRC Companies, Inc.
Fresno, CA
- $50 to $100 USD / hour
…latest technology to devise innovative solutions that stand the test of time. From pipelines to power plants, roadways to reservoirs, schoolyards to security solutions, clients look to TRC…
Added 16 mins ago
E
Market Operations Engineer Lead
ERCOT
Taylor, TX
- $189,800 USD / year
The ERCOT Engineer Development Program (EDP) is a 12- to 16-month, self-paced program geared toward entry-level engineers looking to start a career in the power industry. Through the…
Added 17 mins ago
Digital S/W Eng Intm Analyst - Officer
Citigroup
Irving, TX
Engage in digital applications development, risk technology, Middleware, Mainframe applications, Non-Mainframe applications, Analytic Model Development and Application support activities to…
Added 17 mins ago
Automation and Controls Engineer
CDM Smith
Dallas, TX
…environment which fosters personal leadership, career growth and development for every employee. We value passionate individuals who challenge the norm, deliver world-class solutions and…
Added 18 mins ago
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Java Full Stack Engineer with Spring boot/AWS Experience
Cognizant
Austin, TX
- $86,000 to $99,000 USD / year
7+ years of software development experience with Java/J2EE technologies.
Added 18 mins ago
C
AI Data Engineer
Cognizant
Austin, TX
- $100,000 to $115,000 USD / year
Review, validate, test, debug, and optimize AI-generated code while applying engineering best practices throughout the software development lifecycle.
Added 18 mins ago
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AI Data Engineer
Cognizant
Austin, TX
- $100,000 to $115,000 USD / year
Review, validate, test, debug, and optimize AI-generated code while applying engineering best practices throughout the software development lifecycle.
Added 18 mins ago
Lead AI and Data Science Engineer II- Marketing Measurement
Deloitte
Fort Worth, TX · Houston, TX · Austin, TX · Dallas, TX · San Antonio, TX · Westlake, TX
…collaborative environment? As an experienced Lead AI and Data Science Engineer II - Marketing Measurement, you will have the opportunity to share new ideas and collaborate on projects as a…
Added 18 mins ago
GRC Architect/ Information Security Manager- US
DXC Technology
Austin, TX
DXC Technology is a leading enterprise technology and innovation partner delivering software, services, and solutions to global enterprises and public sector organizations - helping them…
Added 20 mins ago
Commissioning Protection Engineer
GE Grid Solutions, LLC
United States
Hands-on experience with relay testing software (e.g., Omicron Test Universe, Doble ProTest).
Added 20 mins ago
SCADA Commissioning Engineer
GE Grid Solutions, LLC
Remote, United States
Specialized testing software, diagnostic tools, and network test equipment
Added 23 mins ago
RI
Staff Nuclear Engineer
Radiant Industries
El Segundo, CA
- $195,713 to $262,500 USD / year
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…
Added 24 mins ago
Guidance and Control Engineer II - TS/SCI
JPL/NASA
Pasadena, CA
We are seeking a versatile, cross-functional GNC Engineer to support our classified programs. As a cleared Guidance and Control Engineer at JPL, you will work for the Guidance and Control…
Added 29 mins ago
VI
Staff Embedded Software Engineer - 5G Devices & NTN Connectivity
Viasat, Inc.
Carlsbad, CA · Germantown, MD
- $205,000 to $307,000 USD / year
This is a highly impactful engineering position focused on device-side software architecture, embedded Linux development, modem integration, and platform design. You will work closely with…
Added 29 mins ago
VI
Staff Engineer - Terminal Software
Viasat, Inc.
Carlsbad, CA · Germantown, MD
- $205,000 to $307,000 USD / year
We are seeking a Staff Engineer - Terminal Software to provide technical leadership across our embedded software portfolio. In this role, you will influence software architecture,…
Added 29 mins ago
VI
Embedded Rust Software Developer, Viasat Government
Viasat, Inc.
Tampa, FL · Tempe, AZ · Carlsbad, CA · Linthicum Heights, MD · Marlborough, MA
- $145,000 to $218,000 USD / year
This is a role for an Embedded Software Engineer within Viasat Government - High Assurance Encryption Systems experienced in the Rust programming language who is eager to contribute to a…
Added 29 mins ago
VI
Senior Embedded Software Engineer, Viasat Government
Viasat, Inc.
Tempe, AZ · Carlsbad, CA · Tampa, FL · Marlborough, MA · Linthicum Heights, MD
- $205,000 to $307,000 USD / year
This is a role for an Embedded Software Engineer within Viasat Government - High Assurance Encryption Systems experienced in the Rust programming language who is eager to contribute to a…
Added 1 hour ago
Sr. Software Engineer – Enabling Technologies R&D (Atlanta, GA, or other unanticipated locations throughout U.S.)
Insight Global
Atlanta, GA
B.A in Computer Science, Information Technology or closely related. 60 mo. exp as a Software or Project Engineer or any related IT position. 60 mon in: C#; .NET Framework/Core; ASP.NET MVC;…
Added 1 hour ago
IT Security Engineer
CoolSys
UNAVAILABLE
We are seeking a mid-level Security Engineer to support security operations across a geographically distributed, multi-architecture environment. This role is intended for an engineer with 4…
Added 1 hour ago
S
Electrical Engineer
Subsense
Mountain View, CA
- $90,000 to $110,000 USD / year
This role offers an opportunity for an early-career engineer to gain hands-on experience across electrical engineering, biomedical instrumentation, and multidisciplinary system development.…
Added 2 hours ago
Senior GNC Engineer
Kastel Staffing
Moorpark, CA
We are seeking a Senior GNC Engineer IV with extensive experience in drone flight dynamics, control theory, state estimation, and autonomous flight systems. In this role, you will lead the…
Added 2 hours ago
Senior GNC Engineer
Kastel Staffing
Huntsville, AL
We are seeking a Senior GNC Engineer IV with extensive experience in drone flight dynamics, control theory, state estimation, and autonomous flight systems. In this role, you will lead the…
Added 2 hours ago
Manufacturing Engineer III
Blue Origin Personnel, LLC
Space Coast, FL
This role is part of Blue Origin Operations, which is comprised of Integrated Supply Chain, Test Operations, Safety, Quality, and Mission Assurance. This includes Manufacturing and Supply…
Added 2 hours ago
Regional Hotel/Resort Engineer
American Cruise Lines
Lewiston, ID
The Regional Hotel/Resort Engineer is responsible for the overall aesthetic condition and quality of the hotel spaces onboard American Cruise Lines’ ships. The Engineer works closely with…
Added 2 hours ago
Regional Hotel/Resort Engineer
American Cruise Lines
Baton Rouge, LA
The Regional Hotel/Resort Engineer is responsible for the overall aesthetic condition and quality of the hotel spaces onboard American Cruise Lines’ ships. The Engineer works closely with…

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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