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Lead Test Engineer for Power Generation Systems

Radiant Industries

Full-time|On-site|El Segundo HQ

Join Radiant Industries as a Lead Test Engineer for Power Generation Systems, where you will spearhead the strategy and execution of testing for our innovative power generation systems, encompassing turbomachinery, heat exchangers, controls, and primary cooling systems. This position is perfect for a hands-on technical leader who takes pride in developing te…

Feb 10, 2026

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Control Systems Test Engineer

Radiant Industries

Full-time|On-site|El Segundo HQ

About Radiant IndustriesRadiant Industries, based in El Segundo, CA, is pioneering the development of the world's first mass-produced, portable nuclear microreactors. Our flagship product, Kaleidos, is a 1-megawatt, fail-safe microreactor designed for mobility and operational longevity, capable of running for up to five years without refueling. This groundbreaking technology is set to replace diesel generators in various critical applications, including hospitals, data centers, remote locations, and military bases. Our innovative approach integrates modern software engineering with nuclear development to deliver safe, factory-produced microreactors using proven materials. Founded in 2020, Radiant is preparing to test its inaugural reactor at the Idaho National Laboratory next year, with customer deliveries commencing in 2028.Position Overview: Control Systems Test EngineerWe are looking for a driven and meticulous Control Systems Test Engineer to join our dynamic team. In this crucial role, you will take charge of developing, maintaining, executing, and automating comprehensive test cases throughout the testing lifecycle for our reactor control systems. You will work collaboratively with systems engineers, controls developers, and software teams to uphold the highest standards of quality and reliability in our safety-critical control software.Key ResponsibilitiesAnalyze and assess control system Simulink models and related design documents to gain insights into system behavior and expected performance.Interpret system requirements for the reactor control system to establish thorough test coverage.Create and manage detailed test artifacts, including:Unit test casesSoftware-in-the-Loop (SiL) test casesHardware-in-the-Loop (HiL) test casesHardware test casesConduct all testing phases:Unit testingSiL testingHiL testingFull hardware testingAutomate testing workflows for SiL, HiL, and hardware test cases utilizing scripting languages such as Python or Go (Golang).Organize and oversee structured test campaigns, including regression suites.

Feb 17, 2026

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Senior Systems, Integration, and Test Engineer

Varda Space

Full-time|$130K/yr - $180K/yr|On-site|El Segundo, California, United States

About VardaLow Earth orbit is open for business. Varda is at the forefront of developing commercial space infrastructure, ranging from in-orbit pharmaceutical processing to cutting-edge, economical reentry capsules.We are pioneering innovations in the orbital economy by creating products and infrastructure that enable space to tangibly enrich life on Earth. Our mission is to expand the economic horizons of humanity.Our exceptional team, composed of veterans from SpaceX, Blue Origin, leading pharmaceutical companies, and Silicon Valley, is uniquely equipped to achieve this vision. Founded in January 2021 by Will Bruey and Delian Asparouhov, Varda is supported by esteemed investors including Khosla Ventures, Lux Capital, Founders Fund, Caffeinated Capital, General Catalyst, and Also Capital.Headquartered in El Segundo, California, Varda boasts offices and a production facility dedicated to the construction, integration, and testing of our vehicles, equipment, and materials. We also have locations in Washington, DC and Huntsville, AL.Join Varda and be part of shaping a thriving ecosystem in space.

Jan 20, 2026

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Senior Power Systems Engineer at Radiant Industries | El Segundo, CA

Radiant Industries

Full-time|On-site|El Segundo HQ

About RadiantRadiant Industries, based in El Segundo, California, is pioneering the development of the world's first mass-produced, portable nuclear microreactors. Our flagship reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor designed for mobility, capable of providing power anywhere it is needed for up to five years without refueling. This innovative solution offers a sustainable alternative to diesel generators, delivering essential energy support for hospitals, data centers, remote installations, and military bases. By integrating modern software engineering with nuclear technology, we are committed to delivering safe, factory-built microreactors utilizing proven materials. Founded in 2020, we are poised to conduct our first reactor test at the Idaho National Laboratory next year, with initial customer deliveries scheduled to commence in 2028.About the RoleWe are looking for a dedicated Senior Power Systems Engineer to spearhead the design, modeling, and validation of electrical power systems integral to our nuclear microreactor platform. In this pivotal role, you will define the mechanisms of power generation, conditioning, control, and distribution across various environments including grid-connected, islanded, and rapidly deployable settings.You will manage power system studies, from initial architectural considerations to thorough modeling, testing, and validation. Collaborating closely with teams from electrical design, controls, turbomachinery, nuclear, thermal, and software, your efforts will ensure safe, stable, and reliable power delivery under diverse operational and contingency scenarios. This role is crucial to the commercialization of the world's first mass-produced portable nuclear reactors.Responsibilities and Duties:Lead power system modeling and analysis for microreactor power generation systems in both grid-connected and islanded modes.Create and maintain steady-state, dynamic, and electromagnetic transient (EMT) models representing generation assets, loads, protective schemes, and supervisory controls.Conduct power flow, fault analysis, protection coordination, and system stability studies to validate system performance across normal and contingency situations.Assess system behavior during disturbances such as load changes, faults, breaker operations, and generation loss events.Assist in design trade studies to enhance power system architecture, control strategies, and equipment selection.Collaborate cross-functionally to ensure integrated solutions that meet the highest standards of safety and efficiency.

Feb 19, 2026

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Test Engineer

Matter Intelligence

Full-time|On-site|El Segundo

Join Matter Intelligence as a Test Engineer and be a pivotal part of our innovative team. In this role, you will engage in designing, implementing, and executing test plans to ensure the highest quality of our products. Your expertise will contribute to enhancing our systems and improving user experiences.

Mar 17, 2026

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Lead Electrical Motor Design Engineer

Radiant Industries

Full-time|On-site|El Segundo HQ

Radiant Industries is on the lookout for a Lead Electrical Motor Design Engineer to spearhead the architecture, technical direction, and implementation of high-speed alternators and primary loop motors for our cutting-edge nuclear-driven power generation systems. This pivotal role will oversee the electric machine design function that is essential for the commercialization of the world's first mass-produced nuclear reactors.In this position, you will establish a technical vision for motor design while steering efforts in structural, thermal, and system integration. As a player-coach, you will actively engage in design work while mentoring a team of engineers to ensure the delivery of safe, reliable, and production-ready generator systems.This hands-on technical leadership position comes with substantial cross-functional impact.

Feb 19, 2026

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Director of Test Engineering

Radiant Industries

Full-time|On-site|El Segundo HQ

Director of Test EngineeringRadiant Industries, located in El Segundo, CA, is a pioneering startup focused on developing the world's first mass-produced, portable nuclear microreactors. Our flagship reactor, Kaleidos, features a 1-megawatt failsafe design that can be deployed anywhere power is required, functioning for up to five years without refueling. Our innovative portable nuclear power solutions aim to replace traditional diesel generators, offering vital support for healthcare facilities, data centers, remote locations, and military installations. By leveraging modern software engineering techniques, Radiant is committed to creating safe, factory-built microreactors utilizing existing, reliable materials. Founded in 2020, we are poised to test our inaugural reactor at the Idaho National Laboratory next year, with first customer deliveries anticipated in 2028.Position OverviewWe are looking for a dynamic and experienced Director of Test Engineering to take charge of the design, construction, and implementation of our developmental and qualification test programs aimed at validating our reactor systems and components. This hands-on leadership role involves establishing a dedicated service organization focused on designing test setups, developing instrumentation and data acquisition systems, executing test campaigns, and providing high-quality data and reports to our engineering teams.In this role, you will be pivotal in establishing standardized methods, tools, and infrastructure to enable Radiant to test hardware at the speed required by our development timeline. The testing organization will serve as an internal resource for design engineering teams, ensuring responsiveness and ease of collaboration.Key ResponsibilitiesLead the comprehensive execution of developmental, qualification, and acceptance test campaigns for reactor components and subsystems.Design and construct test setups, ranging from simple bench-level fixtures to intricate thermal-hydraulic loop rigs.Develop and uphold test plans and procedures that outline objectives, instrumentation requirements, success criteria, data deliverables, and safety controls.Oversee test campaigns, including hands-on operation of test equipment and management of technicians.Provide data packages and test reports to engineering teams with the quality and traceability necessary for design decisions and regulatory compliance.Design and implement instrumentation systems, including sensor selection, signal conditioning, DAQ hardware configuration, and wiring.

Feb 16, 2026

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ESS Test and Evaluation Engineer

Ensco, Inc.

Full-time|On-site|El Segundo, California, United States

The ESS Test and Evaluation Engineer role at Ensco, Inc. offers an exciting opportunity to contribute to the field of engineering in a dynamic and innovative environment. You will be responsible for developing, implementing, and executing test plans, ensuring that all systems meet rigorous quality standards. Your expertise in testing methodologies will be essential in evaluating system performance and identifying necessary improvements.

Apr 6, 2026

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Immediate Opening for Hardware Test Engineer

usm2

Contract|On-site|El Segundo

We are looking for a skilled Hardware Test Engineer to join our dynamic team at usm2. This is an exciting opportunity for individuals who are passionate about testing and verifying hardware systems. You will be responsible for developing and executing test plans, troubleshooting hardware issues, and ensuring product quality meets the highest standards.

Aug 16, 2017

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Integration and Test Engineer

Varda Space

Full-time|$110K/yr - $160K/yr|On-site|El Segundo, California, United States

About VardaLow Earth orbit is open for business. Varda is at the forefront of developing commercial space infrastructure, facilitating everything from in-orbit pharmaceutical manufacturing to the creation of reliable and cost-effective reentry capsules.Our innovations will enable the production of life-saving pharmaceuticals and advanced fiber optics that can only be manufactured in space. We are committed to transforming the orbital economy by building both the products and the infrastructure necessary for space to directly enhance life on Earth. Our mission is to broaden the economic horizons of humanity.Our team is uniquely equipped to achieve this mission, consisting of industry veterans from SpaceX, Blue Origin, major pharmaceutical companies, and Silicon Valley. Founded in January 2021 by Will Bruey and Delian Asparouhov, Varda has received substantial backing from top-tier investors, including Khosla Ventures, Lux Capital, Founders Fund, Caffeinated Capital, General Catalyst, and Also Capital.Headquartered in El Segundo, California, Varda operates a state-of-the-art production facility where our vehicles, equipment, and materials are designed, integrated, and tested. We also maintain offices in Washington, DC, and Huntsville, AL.Join Varda to contribute to the creation of a thriving in-space ecosystem.About This RoleAs an Integration and Test Engineer, you will play a pivotal role in overseeing vehicle systems integration and testing processes. Your responsibilities will encompass the full spectrum of integration and testing activities, ensuring that our systems function flawlessly to meet the high standards of our ambitious mission.

Jun 12, 2025

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Performance Testing Engineer with Apache JMeter Expertise

Sonsoft Inc.

Full-time|On-site|El Segundo

Join our dynamic team at Sonsoft Inc. as a Performance Testing Engineer! We are seeking a skilled professional proficient in performance testing tools, particularly Apache JMeter. In this role, you will be responsible for designing, implementing, and executing performance test plans, analyzing results, and providing actionable insights to enhance system performance.Your expertise in test management tools, especially HP ALM, will be essential in ensuring quality and efficiency throughout the testing lifecycle. This is an exciting opportunity to work in a collaborative environment where innovation and excellence are valued.

Jul 18, 2017

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SATCOM Test & Evaluation Engineer

ENSCO Inc.

Full-time|$98K/yr - $122K/yr|On-site|El Segundo, California, United States

For over five decades, ENSCO Inc. has been at the forefront of delivering innovative engineering, scientific, and advanced technology solutions to both government and private sectors globally.Our commitment to excellence drives us to develop and implement sophisticated technologies that ensure mission success. We specialize in systems engineering, integration, and advanced technology services aimed at enhancing the safety, security, and resilience of critical operations across terrestrial, aerial, and space domains, as well as the information systems that interconnect them.Discover more about ENSCO.Position OverviewENSCO Inc. is on the lookout for a talented SATCOM Test & Evaluation Engineer. Join our dynamic systems engineering team as we define the future of space communication systems that support the US Space Force (USSF) satellite communications. This role involves collaborating in a multidisciplinary environment to support Systems Engineering & Integration (SE&I) activities.The ideal candidate will interface with SE&I team members, contractors, government personnel, and USSF representatives, taking a lead role in working groups to facilitate technical discussions, identify and mitigate risks, address requirement gaps, create briefings, track action items, and document meeting minutes.As part of the MILSATCOM Systems Engineering, Integration, and Test (MSEIT) initiative, we provide cutting-edge SE&I support to the USSF’s Space Systems Center (SSC). Our mission is to aid the Space Force in acquiring state-of-the-art satellite communications systems that provide secure, survivable, and protected communications for our nation's military personnel. We seek individuals who thrive in collaborative settings and are eager to tackle the complexities of integrating advanced space and ground communication systems. This role is based on-site in El Segundo, CA.Key Responsibilities include, but are not limited to:Developing Test and Evaluation strategies, creating Test and Evaluation Master Plan (TEMP) content, and formulating verification plans.

Mar 31, 2026

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Early Career Test Engineer - Sensors

Matter Intelligence

Full-time|On-site|El Segundo

Join Matter Intelligence as an Early Career Test Engineer specializing in advanced sensor technology. In this dynamic role, you will collaborate with cross-functional teams to design, implement, and execute tests that ensure the reliability and performance of our cutting-edge sensor products. You will have the opportunity to contribute to innovative projects that shape the future of technology.

Mar 24, 2026

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Power Electronics Engineer II at CesiumAstro | El Segundo, CA

CesiumAstro

Full-time|On-site|El Segundo, CA

Important Notice: In compliance with the U.S. Government Space Technology Export Regulations, applicants must be U.S. citizens, lawful permanent residents, conditional residents, asylees, or refugees, or be eligible to acquire the necessary authorizations from the U.S. Department of State.At CesiumAstro, we are innovators and leaders in developing advanced communication systems for satellites, UAVs, launch vehicles, and various space and airborne platforms. Our vibrant and collaborative work environment fosters learning, growth, and engagement across all levels of our organization. If you seek an interactive, hands-on work experience with autonomy, CesiumAstro is the perfect place for you. We invite enthusiastic, team-oriented, and innovative individuals to become part of our journey.We are on the lookout for a Power Electronics Engineer II to bolster our expanding spacecraft payload development team. In this role, you will play a crucial part throughout the entire development lifecycle of cutting-edge power electronics hardware for satellites and space power systems payloads. Your contributions will range from defining power system architectures and conducting trade studies to detailed circuit design, simulation, PCB layout, verification, integration testing, and providing manufacturing support.

Feb 28, 2026

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Systems Integration Engineer

Radiant Industries

Full-time|On-site|El Segundo, CA

We are seeking a dynamic Systems Integration Engineer to join our innovative team at Radiant Industries. In this role, you will be responsible for designing, implementing, and optimizing integrated systems that enhance operational efficiency and performance. You will collaborate closely with cross-functional teams to ensure seamless integration of complex systems.As a Systems Integration Engineer, you will have the opportunity to work on exciting projects that push the boundaries of technology and innovation. Your expertise will be essential in analyzing system requirements, developing integration strategies, and troubleshooting any issues that arise.

Apr 10, 2026

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Senior Systems Integration Engineer – Evolved Strategic Systems (ESS)

ENSCO Inc.

Full-time|$140K/yr - $200K/yr|On-site|El Segundo, California, United States

With over 50 years of experience, ENSCO Inc. has been at the forefront of delivering innovative engineering, science, and advanced technology solutions to government and private sectors globally.We take pride in our ability to create and implement cutting-edge technologies that ensure mission success. Our services encompass systems engineering, integration, and advanced technologies that enhance the safety, security, and resilience of critical missions across various domains, including ground, air, space, and information systems.Discover more about ENSCO.Position DescriptionWe are currently looking for a Senior Evolved Strategic Systems (ESS) Program Systems Integration Engineer to join our dynamic Systems Engineering team. This team is responsible for shaping the future of space communication systems that support the Air Force Military Satellite Communications. The successful candidate will engage in Systems Engineering & Integration (SE&I) activities within a multidisciplinary and collaborative framework. You will be expected to collaborate with SE&I team members, contractors, government personnel, and members of the USAF. This role includes leading and supporting multiple working groups to facilitate technical discussions, identify and mitigate risks, address requirement gaps, create briefings, track action items, and document meeting minutes.The MILSATCOM Systems Engineering, Integration, and Test (MSEIT) initiative offers advanced SE&I capabilities for the Air Force’s Space and Missiles System Center. We play a crucial role in the acquisition of state-of-the-art Military Satellite Communications systems, ensuring secure, survivable, and protected communications for our nation’s military personnel. We are seeking technically adept individuals who can thrive in a highly collaborative small team environment, utilizing the latest tools and methodologies to overcome the complexities of integrating sophisticated space and ground communication systems. This position is based on-site in El Segundo, CA. Key responsibilities include but are not limited to:Developing and executing integration strategies and processes to ensure the successful integration of satellite communication systems, segments (Ground, Space, Crypto, Terminals), subsystems, elements, and components; managing the technical baselines among various stakeholders.Conducting thorough analyses of system requirements that define the technical frameworks necessary for successful project execution.

Mar 31, 2026

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Senior Motor Design Engineer

Radiant Industries

Full-time|On-site|El Segundo HQ

Senior Motor Design EngineerJoin Radiant Industries as a Senior Motor Design Engineer, where you will play a pivotal role in designing and developing an advanced alternator for our nuclear-powered high-speed generator. This position entails the design of active components as well as conducting structural and thermal analyses of high-speed generators. You will work collaboratively with cross-functional engineering teams and closely engage with the Power Conversion and Electrical Systems team responsible for efficiently converting mechanical energy into electrical energy, ensuring safety and reliability for our clients. As the ideal candidate, you will take ownership of the active part design for generators, and will also be responsible for conducting simulations, performing analysis, and selecting components. Your contributions will directly impact the commercialization of groundbreaking mass-produced nuclear reactors, delivering clean energy to remote areas and critical infrastructure.

Feb 19, 2025

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Senior Power Electronics Engineer at Radiant Industries | El Segundo, CA

Radiant Industries

Full-time|On-site|El Segundo HQ

Join Radiant IndustriesRadiant Industries, based in El Segundo, CA, is pioneering the development of the world’s first mass-produced portable nuclear microreactors. Our flagship reactor, Kaleidos, is a revolutionary 1-megawatt microreactor designed for mobility and efficiency, capable of running for up to five years without refueling. This innovative solution provides a sustainable alternative to diesel generators, supporting critical operations for hospitals, data centers, remote locations, and military installations. Founded in 2020, we're on a mission to transform the energy landscape with safe, factory-built microreactors, leveraging cutting-edge software engineering. With our first reactor set to be tested at Idaho National Laboratory next year and initial customer deliveries projected for 2028, now is an exciting time to join our team.Role OverviewAs a Senior Power Electronics Engineer, you will be integral to the design and development of power electronics for our nuclear-powered high-speed generator. Your expertise will be crucial in the creation of high-voltage and high-speed generator drives, DC-DC converters for high-voltage batteries, and inverters for both standalone and grid-tied applications. Collaborating with a dynamic team, you will be responsible for the complete power electronics design, analysis, simulation, and component selection. You will work alongside leading industry engineers and engage with vendors and governmental organizations, playing a key role in bringing our groundbreaking nuclear microreactor to market.Key ResponsibilitiesDesign power electronic systems to convert AC and DC power into stable, grid-compatible voltages and frequencies.Take ownership of configuring active rectifiers, inverters, and DC-DC converters.Implement EMI/EMC strategies in system design, including line filter selection, capacitors, grounding, and isolation.Apply your expertise in designing and validating gate drivers, power stages, magnetics, and control systems.Conduct modeling and detailed simulation of inverters.Lead the design and construction of fully functional inverters independently.Perform formal circuit analysis, including de-rating and worst-case scenario evaluations.Optimize for loss, efficiency, and conduct thermal analysis of the inverters.

Mar 17, 2026

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Mechanical Engineer - Electrical Systems

Radiant Industries

Full-time|On-site|El Segundo HQ

About Radiant IndustriesRadiant Industries, headquartered in El Segundo, CA, is pioneering the development of the world’s first mass-produced portable nuclear microreactors. Our flagship reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor designed for mobility, capable of providing power for up to five years without the need for refueling. This innovative technology serves as a sustainable alternative to diesel generators, delivering essential power to hospitals, data centers, remote sites, and military bases. Leveraging modern software engineering and advanced materials, we aim to revolutionize nuclear energy. Founded in 2020, we are poised to test our inaugural reactor at the Idaho National Laboratory in the coming year, with commercial deployments targeted for 2028.About the RoleWe are looking for a dynamic and driven early-career Mechanical Engineer to join our team and contribute to the design and integration of electrical systems within our innovative projects. In this role, you will collaborate with seasoned mechanical and electrical engineers to tackle complex challenges related to packaging, thermal management, structural design, and overall system integration for cutting-edge hardware. This position offers a unique opportunity for hands-on experience throughout the entire hardware development process, from CAD design and analysis to testing and validation, all while supporting our mission to successfully launch the first commercial nuclear reactor in over five decades by 2026.Responsibilities & DutiesContribute to the mechanical design and oversight of electrical components and subsystems, including:Designing mechanical assemblies for electrical components such as control panels, enclosures, brackets, mounts, and supports.Routing and securing cables and wiring harnesses, ensuring strain relief, compliance with bend radius, and serviceability.Integrating sensors, actuators, connectors, and electrical hardware within limited spaces.Creating 3D CAD models and 2D drawings using Siemens NX, including tolerance stack-ups and GD&T fundamentals.Conducting initial load calculations (static, shock, vibration) to guide structural design.Performing thermal analyses and heat transfer evaluations for electrical components and assemblies.Assisting in the selection of suitable materials, fasteners, and finishes based on electrical, thermal, and environmental considerations.

Jan 27, 2026

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Electromagnetic Warfare Systems Engineer

cx2

Full-time|On-site|El Segundo, CA

Join cx2 as an Electromagnetic Warfare Systems Engineer, where you'll play a pivotal role in designing, developing, and implementing advanced electromagnetic systems. You will collaborate with a dynamic team of engineers to tackle complex challenges and innovate cutting-edge solutions that enhance national security.

Mar 27, 2026

Senior Power Electronics Engineer at Radiant Industries | El Segundo, CA

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