El Segundo, California, United States · On-site
$161k–$236k/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: Regulatory Submissions, Licensing Execution, Technical Documentation, Project Management, Stakeholder Management
Northrop Grumman Mission Systems, Inc.El Segundo, California, United States · On-site
$162k–$242k/yr
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Top Secret TRAVEL: Yes, 10% of the TimeDescription At Northrop Grumman, our employees have incredible opport…
Skills: Systems Engineering, Functional Management, Project Planning, Earned Value Management, Performance Measurement Baseline
El Segundo, California, United States · On-site
$162k–$242k/yr
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Top Secret TRAVEL: Yes, 10% of the TimeDescription At Northrop Grumman, our employees have incredible opport…
Skills: Systems Engineering, Functional Management, Project Planning, Earned Value Management, Performance Measurement Baseline
El Segundo, California, United States · On-site
$46/hr–$63/hr
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: 5-Axis CNC Machining, CAM Programming, Mastercam, SolidWorks, GD&T
El Segundo, California, United States · Remote OK
Company Overview ImmunityBio, Inc. (NASDAQ: IBRX) is a commercial-stage biotechnology company developing cell and immunotherapy products that are designed to help strengthen each patient’s natural immune system, potentia…
Skills: Threat Hunting, Cyber Threat Intelligence, Incident Response, Risk Evaluation, Technical Analysis
El Segundo, California, United States · On-site
$200k–$225k/yr
Title: SME, Acquisition and Engineering Belong. Connect. Grow. with KBR! KBR’s National Security Solutions team provides high-end engineering and advanced technology solutions to our customers in the intelligence and nat…
Skills: Acquisition Management, Software Acquisition, Strategic Planning, Financial Management, Risk Assessment
El Segundo, California, United States · On-site
$135k–$228k/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: Kubernetes, AWS, Linux Systems Administration, Infrastructure-as-Code, Automation
El Segundo, California, United States · On-site
$79k–$107k/yr
Entry-Level Mechanical Product Design and Analysis Engineer Company: The Boeing Company Boeing Space, Intelligence & Weapons Systems is currently hiring an Entry-Level Space Electronics Packaging and Mechanical Product D…
Skills: Mechanical Product Design, Electronics Packaging, Thermal Analysis, Structural Analysis, Vibration Analysis
El Segundo, California, United States · Remote OK
Company Overview ImmunityBio, Inc. (NASDAQ: IBRX) is a commercial-stage biotechnology company developing cell and immunotherapy products that are designed to help strengthen each patient’s natural immune system, potentia…
Skills: Physical Security Systems, Access Control, CCTV, Intrusion Detection, Incident Response
El Segundo, California, United States · On-site
$120k–$180k/yr
We’re on a mission to make the skies safe and accessible for everyone. Our technology gives pilots greater control by simplifying the management of any aircraft during standard flight operations, inclement weather, and e…
Skills: Matlab, Simulink, C++, Python, Git
El Segundo, California, United States · On-site
$117k–$227k/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: Systems Engineering, Requirements Verification And Validation, Spacecraft Subsystems, Integration And Test, Configuration Management
El Segundo, California, United States · On-site
$151k–$227k/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: Systems Engineering, OPIR Space Vehicle Systems, Ground Systems, Launch Vehicle Interfaces, Interface Control Documents
El Segundo, California, United States · On-site
$105k–$135k/yr
Amca is building America’s new industrial base. Since the 1990s, our ability to build new aviation and military systems and maintain the ones we already have has eroded. Today, the gap between what the nation needs to pr…
Skills: Electrical Design, Python, C#, C++, Java
El Segundo, California, United States · On-site
$100k–$130k/yr
Amca is building America’s new industrial base. Since the 1990s, our ability to build new aviation and military systems and maintain the ones we already have has eroded. Today, the gap between what the nation needs to pr…
Skills: Design For Manufacturability, GD&T, Siemens NX, Python, MATLAB
El Segundo, California, United States · On-site
$100k–$130k/yr
Amca is building America’s new industrial base. Since the 1990s, our ability to build new aviation and military systems and maintain the ones we already have has eroded. Today, the gap between what the nation needs to pr…
Skills: Mechanical Design, Fluid Dynamics, Thermodynamics, Solid Mechanics, GD&T
El Segundo, California, United States · On-site
$100k–$130k/yr
Amca is building America’s new industrial base. Since the 1990s, our ability to build new aviation and military systems and maintain the ones we already have has eroded. Today, the gap between what the nation needs to pr…
Skills: Test Methodology, GD&T, Project Management, Fluid Systems Testing, Electrical Systems Testing
El Segundo, California, United States · On-site
$106k–$232k/yr
Embedded Software Engineer (Associate, Experienced, or Senior) Company: The Boeing Company The Boeing Defense, Space & Security (BDS) Space Mission Systems (SMS) software capability is seeking multiple Embedded Software …
Skills: C/C++, RTOS, Embedded Linux, BSP Development, ARM Architecture
El Segundo, California, United States · On-site
$99k–$215k/yr
Launch System Integration Engineer (Mid-career) - 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 …
Skills: Launch System Integration, Spacecraft Launch Operations, Interface Control Documentation, Mission Design, Orbital Analysis
El Segundo, California, United States · On-site
$96k–$182k/yr
Date Posted: 2026-07-13 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: Activ…
Skills: SystemVerilog, UVM, OVM, VHDL, Verilog
El Segundo, California, United States · On-site
$106k–$232k/yr
Embedded Software Engineer (Associate, Experienced, or Senior) Company: The Boeing Company The Boeing Defense, Space & Security (BDS) Space Mission Systems (SMS) software capability is seeking multiple Embedded Software …
Skills: C/C++, RTOS, Embedded Linux, BSP Development, ARM Architecture
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Lead the authorization and licensing process for portable nuclear microreactors with military partners and regulatory bodies. Coordinate technical teams to deliver formal applications, safety analyses, and physical protection plans.
Requires a Bachelor's degree in engineering and at least 5 years of experience in a regulated industry, preferably with the NRC or DOE. Must possess strong technical writing skills and the ability to navigate complex regulatory environments.
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 an experienced Regulatory Program Manager who loves to think outside the box and challenge convention; in this role you will lead the authorization process for reactor deployment with our military partners. You will be responsible for regulatory submissions and timelines, collaborating across technical teams to create and deliver a formal application. You will lead interactions between regulators and the engineering team to obtain clarity and answers on regulation as well as manage and provide mentorship to junior members of the team. This is an opportunity to bring advanced nuclear technologies to market while also influencing the federal government and modernizing regulation.
Manage the customer relationship, coordinating interactions and meetings, tracking deliverables, submission and acceptance, and compliance to contracts.
Own end to end licensing execution efforts required to fulfill an application deliverable, ranging from detailed safety analysis to a physical protection plan.
Partner closely with internal stakeholders and external regulatory bodies to drive efficient project execution and authorization.
Oversee execution by technical teams including design reviews and regulatory and quality documentation; organize their inputs into data products and reports; raise regulatory concerns and see through timely and successful resolution.
Proactively review approaches and decisions as they relate to regulatory efforts to ensure adherence to Radiant’s novel and efficient licensing paths.
Comfortable working in uncertainty on first-of-a-kind projects.
Bachelor’s degree in engineering (nuclear, mechanical, electrical, computer science, or similar) from an accredited institution.
5 years experience in a regulated industry, preferably nuclear programs regulated by the NRC or DOE.
Experience directly interfacing, interpreting and implementing regulatory requirements, with a focus on streamlining and right-sizing.
Excellent verbal and written communication and negotiation abilities; ability to navigate regulatory conversations effectively and write technical documentation.
Thorough understanding of the engineering design process in a fast paced or agile hardware development environment.
Experience in emergency preparedness, fire protection, safety analysis, radiation protection or other related regulatory subjects.
Strong engineering fundamentals with an ability to understand and translate applicable portions of system design into a license application.
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 571 listings with disclosed salaries, most science & research jobs in El Segundo, CA pay between $99k–$225k per year. Individual offers vary with seniority, company size, and specialization.
There are currently 628 open science & research positions in El Segundo, CA listed on Clera. New openings are added daily as companies post roles.
Companies currently hiring include The Aerospace Corporation, Boeing, Varda Space Industries, Radiant, Northrop Grumman, among others. Browse the listings above to see every active employer.
Yes — 74 of the 628 open science & research positions offer remote or hybrid work (17 remote, 57 hybrid).
Each listing links directly to the employer's application page. Apply early — fresh listings get the most recruiter attention in the first two weeks.
