El Segundo, California, United States · On-site
$169k–$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: Structural engineering, Mechanical engineering, Stress analysis, Finite element analysis, Abaqus
El Segundo, California, United States · On-site
$110k–$138k/yr
Title: Enterprise Requirements and Integration Engineer Belong. Connect. Grow. with KBR! KBR’s National Security Solutions team provides high-end engineering and advanced technology solutions to our customers in the inte…
Skills: Systems Engineering, Model Based System Engineering (MBSE), Requirements Management, Technical Baseline Management, Systems Integration
El Segundo, California, United States · On-site
$90k–$140k/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: RF engineering, Microwave engineering, Radar systems, Sensor systems, Communication systems
El Segundo, California, United States · On-site
$100k–$140k/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…
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El Segundo, California, United States · On-site
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DSP Algorithms Engineer (Mid-Level or Lead) Company: The Boeing Company Boeing Defense, Space and Security is seeking DSP Algorithms Engineers (Mid-Level or Lead) to join the Space, Intelligence and Weapons Systems teams…
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El Segundo, California, United States · On-site
$150k–$175k/yr
About Us At Arbor Energy & Resources Corporation ("Arbor Energy"), we’re creating technology to power our lives while protecting the planet that sustains them. Our advanced power systems deliver clean, reliable baseload …
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El Segundo, California, United States · On-site
$24/hr–$45/hr
Senior R&D Laboratory Technician – Formulation El Segundo, CA | Full-Time | On-Site Must be a U.S. Persons due to the nature of our work. Defense, aerospace, and other high-performance applications demand new material so…
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El Segundo, California, United States · On-site
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A New Paradigm For Space Operations. Who We Are: Space Kinetic is a dual use space technology startup building a completely new architecture for space operations – one that brings the advantages of proliferated drone tec…
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El Segundo, California, United States · On-site
Check out this new opportunity! Thermal Engineer Spacecraft Thermal Systems On-site in El Segundo, CA Target salary range: $102,000 - $182,500.00 We are hiring a Thermal Engineer to support spacecraft development program…
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El Segundo, California, United States · On-site
Check out this new opportunity! Senior Spacecraft Integration & Test Engineer ATLO | Satellite Systems On-site in El Segundo, CA $119,850 - $215,000/Yearly We are hiring a Senior Spacecraft Integration & Test Engineer to…
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El Segundo, California, United States · On-site
SAIC is seeking a Launch Integration Engineer to support national security space missions by integrating satellite programs with launch vehicle providers. This role supports mission planning, technical baseline integrati…
Skills: Mission integration, Launch vehicle integration, Requirements development, Risk assessment, Trade studies
El Segundo, California, United States · On-site
$177k–$239k/yr
Principal Component Engineer Company: The Boeing Company Boeing Defense, Space & Security (BDS) is seeking a high-performing, experienced, self-motivated Component Engineer with Electro-Optics/Infrared/Photonics devices …
Skills: Electro-optics, Infrared, Photonics, EEE parts, Satellite engineering
El Segundo, California, United States · Hybrid
$100k–$176k/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: Structural analysis, Finite element analysis, Solid mechanics, Electronics packaging, Structural dynamics
El Segundo, California, United States · On-site
$42/hr–$47/hr
Company Overview ImmunityBio is a vertically integrated commercial stage biotechnology company developing next-generation therapies that bolster the natural immune system to defeat cancers and infectious diseases. The Co…
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El Segundo, California, United States · On-site
$105k–$167k/yr
About the jobCompany Overview Hybron is an advanced manufacturing company that is building lightweight composites at mass production scale. At Hybron, we have pioneered a new composites manufacturing process that enables…
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El Segundo, California, United States · On-site
$177k–$239k/yr
Lead Electrophysics Engineer Company: The Boeing Company Boeing Defense Space & Security (BDS) is seeking highly motivated Lead Electrophysics Engineer (Level 5) to support various programs located in Huntington Beach, C…
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El Segundo, California, United States · On-site
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Rainmaker builds systems to increase precipitation and improve water availability. We combine atmospheric science, autonomous aircraft, radar and satellite observations, weather modeling, and novel sensing technologies. …
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El Segundo, California, United States · On-site
$114k–$213k/yr
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 25% of the TimeDescription At Northrop Grumman, our employees have incredible opportunit…
Skills: Flight control algorithms, Guidance navigation and control, MATLAB, Simulink, Fixed-wing aircraft
El Segundo, California, United States · On-site
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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: Digital signal processing, Communication systems, RF systems, Satellite communications, MATLAB
Northrop Grumman Mission Systems, Inc.El Segundo, California, United States · On-site
$114k–$213k/yr
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 25% of the TimeDescription At Northrop Grumman, our employees have incredible opportunit…
Skills: Guidance Navigation and Controls, Flight control algorithms, MATLAB, Simulink, Fixed-wing aircraft
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The Staff Structures Engineer will design and develop critical components for nuclear microreactors, including shielding systems and high-temperature structures. They are responsible for performing structural and thermomechanical analysis, managing the bill of materials, and overseeing manufacturing and testing schedules.
Candidates must hold a bachelor's degree in Mechanical, Aeronautical, Civil, or Structural Engineering. The role requires at least 7 years of structural design experience and 5 years of experience performing stress analysis using finite element tools.
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 highly motivated Staff Structures Engineer to design and develop critical structures within Kaleidos. You will solve unique challenges creating efficient and reliable structures that facilitate fission while surviving extreme temperature environments and meeting volumetric constraints. You will be responsible for the following: trade studies, material selection, detailed structural analysis, assembly, integration, and testing. You will have an instrumental impact of fueling the first new commercial reactor design in over 50 years by 2026.
Responsibilities & Duties:
Ownership of critical structures such as mass-efficient transportable shielding systems, container system, and high temperature graphite and metallic systems.
Conduct trade studies and develop designs to meet program requirements.
Perform detailed thermomechanical analysis (static strength, durability/fatigue) and dynamic analysis (vibration, shock) to determine structural integrity (margins of safety) using both hand calculations and finite element tools.
Develop and execute manufacturing/assembly instructions and test plans.
Create and manage a Bill-Of-Materials (BOM).
Find and develop suppliers for components.
Own subassembly design, manufacturing, and test schedules.
Own risk analysis (FMEA) for subsystems.
Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication.
Required Qualifications & Skills:
Bachelor’s degree from an accredited institution in Mechanical, Aeronautical, Civil or Structural Engineering.
7+ years of experience designing structures.
5+ years of experience performing stress analysis using both hand calculations and finite element tools (Abaqus, Ansys, FEMAP, or similar).
Desired Qualifications & Skills:
Experience with design of multi-component assemblies in CAD (NX or similar).
Experience designing hardware that was manufactured, deployed, and iteratively improved.
Experience resolving thermal expansion issues in designs.
Experience working with interdisciplinary teams.
Solid understanding and application of GD&T.
Proficiency with both “hand calc” analytical methods and higher fidelity finite element-based analysis methods.
Ability to derive free-body diagrams for systems with which one was not previously familiar.
Self-motivated with strong organizational, written, and oral communication skills.
Experience with using text-based software development tools.
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, Northrop Grumman, Radiant, among others. Browse the listings above to see every active employer.
Yes — 71 of the 628 open science & research positions offer remote or hybrid work (15 remote, 56 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.
