El Segundo, California, United States · On-site
$150k–$208k/yr
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 b…
Skills: Technical Writing, Instructional Design, Nuclear Reactor Operations, Curriculum Development, Configuration Management
El Segundo, California, United States · Hybrid
$129k–$194k/yr
The Aerospace Corporation is the trusted partner to the nation’s space programs, solving the hardest problems and providing unmatched technical expertise. As the operator of a federally funded research and development ce…
Skills: Software Architecture, Cloud Computing, Microservices, Containerization, REST APIs
El Segundo, California, United States · On-site
$121k–$260k/yr
Senior Optical Systems Engineer - Millennium Space Systems Company: Millennium Space Systems Millennium Space Systems, a part of Boeing Defense, Space and Security (BDS), is a fast, agile small satellite company focused …
Skills: Optical Systems Engineering, Electro-Optical Sensors, Infrared Sensors, Laser Communication, Phenomenology Modeling
El Segundo, California, United States · On-site
$118k–$225k/yr
Date Posted: 2026-06-30 Country: United States of America Location: US-CA-EL SEGUNDO-E01 ~ 2000 E El Segundo Blvd ~ BLDG E01 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: U.S. …
Skills: Analog Design, Digital Design, Power Electronics, Circuit Card Assembly Design, Systems Engineering
El Segundo, California, United States · On-site
$92k–$171k/yr
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: No CLEARANCE TYPE: Secret TRAVEL: Yes, 25% of the TimeDescription At Northrop Grumman, our employees have incredible opportuniti…
Skills: Avionics Hardware Architecture, Flight Control Systems, Hardware/Software Integration, Verification & Validation, Engineering Modeling
El Segundo, California, United States · On-site
Exceptional Hospitality Starts with You Picture yourself brightening someone’s day. When you join our hotels team, that’s exactly what you’ll do every time you come to work! As an Engineer, you are responsible for keepin…
Skills: Carpentry, Masonry, Plumbing, Electrical, HVAC
El Segundo, California, United States · Hybrid
$131k–$180k/yr
#WeAreIn for jobs that impact everyone's life. What if your ideas could change the way the world connects, powers up, or thinks? As a Senior Staff EDA Support Engineer in our Research & Development team, you'll have the …
Skills: EDA Tools, Semiconductor Design, Scripting, Debugging, Interpersonal Skills
El Segundo, California, United States · On-site
$120k–$155k/yr
About Varda Low Earth orbit is open for business. Varda is accelerating the development of commercial space infrastructure, from in-orbit pharmaceutical processing to reliable and economical reentry capsules. Varda’s W-S…
Skills: Facilities Management, People Management, HVAC, MEP Systems, CMMS Administration
El Segundo, California, United States · On-site
$140k–$220k/yr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: Docker, Kubernetes, Infrastructure as Code, CI/CD, Azure
El Segundo, California, United States · On-site
$140k–$220k/yr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: Docker, Kubernetes, Infrastructure as Code, CI/CD, Azure
El Segundo, California, United States · On-site
$150k–$210k/yr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: Digital Circuit Design, Signal Integrity Analysis, Power Integrity, PCB Design, FPGA Integration
El Segundo, California, United States · Hybrid
$145k–$220k/yr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: Linux System Administration, Systems Integration, Python, Bash, Networking
El Segundo, California, United States · On-site
$130k–$160k/yr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: EHS Program Management, Regulatory Compliance, Incident Investigation, Risk Assessment, Hazard Communication
El Segundo, California, United States · On-site
$35/hr–$58/hr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: System Deployment, Technical Troubleshooting, Hardware Integration, Tactical Communications, Networking
El Segundo, California, United States · On-site
$28/hr–$40/hr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: System Deployment, Technical Troubleshooting, Hardware Integration, Tactical Communications, Networking
El Segundo, California, United States · On-site
$140k–$200k/yr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: RMF, ICD 503, JSIG, DAAPM, NIST SP 800-37
El Segundo, California, United States · On-site
$120k–$180k/yr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: Cloud Architecture, AWS GovCloud, Azure Government, Zero Trust Architecture, Infrastructure as Code
El Segundo, California, United States · On-site
$120k–$180k/yr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: DLP Administration, Network Security, Data Classification, Incident Response, Policy Tuning
El Segundo, California, United States · On-site
$110k–$190k/yr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: Enterprise Application Architecture, Systems Integration, Cloud Architecture, API Strategy, DoD Compliance
El Segundo, California, United States · On-site
$150k–$210k/yr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: Power Electronics, Analog Board Design, Circuit Simulation, PCB Layout, EMI/EMC Mitigation
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Develop and refine training materials, manuals, and operating procedures for reactor operators. Collaborate with engineering and test teams to translate technical system knowledge into actionable training content and regulatory documentation.
Requires a Bachelor's degree in Engineering, Physics, or a related field with 2+ years of technical writing experience in complex engineering environments. Must be able to interpret engineering drawings and deliver instructional material in classroom settings.
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.
Radiant is seeking a Reactor Operations Training Specialist to play a critical role in enabling safe, scalable operations for the line of Kaleidos reactors. In this role, you will be responsible for building Reactor Operator training resources to enable timely and effective training and certification of operators. This role goes beyond traditional documentation, requiring close, daily collaboration with operators, engineers, and test teams to rapidly translate emerging system knowledge into clear, actionable content. This role may also support engineering operations through the development of test plans, data reviews, and other key technical documentation needed to move from prototype to commercial deployment.
Develop and continuously refine Reactor Operator training materials, including operator manuals, learning objectives, lesson plans, operating procedures, and evaluation tools.
Direct experience with nuclear systems, reactor operations, or operator training programs.
Maintain records of operator qualification to DOE/NRC standards. Translate evolving reactor designs and operational concepts into clear, concise, and easily understood training content.
Embed with engineering, test, and operations teams to capture real-time technical insights and lessons learned and reflect them in documentation.
Establish and maintain documentation standards, templates, and style guides suited for a fast-paced startup environment.
Manage document lifecycles within configuration-controlled systems, including version control, change tracking, and rapid updates.
Balance speed and rigor to ensure documentation supports both rapid development and regulatory expectations.
Capture operational lessons learned and support development of regulatory documents, to include white papers and topical reports.
Bachelor’s degree in Engineering, Physics, Technical Communication, or a related technical discipline.
2+ years of technical writing experience in a complex, engineering-driven environment (e.g., nuclear, aerospace, energy, or advanced hardware).
Familiarity with complex systems and the ability to distill them into operator-focused training content through both written and verbal mediums.
Ability to deliver instructional material in both group and one-on-one classroom environments.
Ability to read and interpret engineering drawings, specifications and procedures.
Ability to work with incomplete or evolving technical information and produce clear, accurate documentation.
Experience developing training materials, technical references, or test documentation.
Strong collaboration skills and comfort working directly with engineers and operators in a dynamic setting.
Familiarity with document control and configuration management principles.
Background in instructional design or building technical training programs
Familiarity with NRC or DOE regulatory instructions and licensing considerations for commercial reactors.
Ability to operate with a high degree of ownership and autonomy in an evolving organizational structure.
Must be willing to work extended hours and weekends as necessary to accomplish our mission.
Must work 100% onsite at El Segundo HQ.
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: [email protected].
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.
Making Nuclear Power Portable.
Radiant is building the world’s first mass-produced portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1 MW failsafe microreactor that can be transported anywhere power is needed. Founded in 2020, Radiant plans to test its first reactor in 2026, with initial customer deployments beginning in 2028.
Offices: 1921 E Maple Ave, El Segundo, California 90245, US
Based on 1000 listings with disclosed salaries, most engineering jobs in El Segundo, CA pay between $94k–$220k per year. Individual offers vary with seniority, company size, and specialization.
There are currently 1,089 open engineering positions in El Segundo, CA listed on Clera. New openings are added daily as companies post roles.
Companies currently hiring include Boeing, The Aerospace Corporation, CHAOS Industries, Northrop Grumman, RTX, among others. Browse the listings above to see every active employer.
Yes — 75 of the 1089 open engineering positions offer remote or hybrid work (8 remote, 67 hybrid).
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