Test Engineer

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.

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.

Join CX2, a pioneering defense technology firm dedicated to achieving spectrum superiority for the United States and its allies. Our cutting-edge, AI-integrated hardware and software solutions are designed to detect, disrupt, and safeguard the electromagnetic spectrum across land, air, sea, and space.We are currently on the lookout for a proactive Hardware Test Engineer to spearhead the development and execution of testing protocols for our hardware products in a dynamic manufacturing setting. In this role, you will be instrumental in validating product performance, reliability, and compliance by designing test procedures, fixtures, and automated testing systems. This position will support both new product introductions (NPI) and high-volume production efforts at our headquarters in El Segundo, CA.

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.

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.

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.

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.

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.

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.

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.

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 test infrastructures, managing complex hardware operations, and mentoring engineering talent while being actively engaged in daily testing activities.In this role, you will take charge of the testing development for our high-speed machinery and build our testing facilities from the ground up. These infrastructures will be pivotal for rapid design iterations, focusing on evaluating vibration, performance, thermal behavior, and system reliability, ultimately facilitating a smooth transition into production acceptance testing. You will collaborate closely with mechanical design, analysis, manufacturing, and operations teams to validate and ensure that turbomachinery designs meet production standards.

CX2 is an innovative defense technology company dedicated to achieving spectrum dominance for the United States and its allies. Our cutting-edge, AI-driven hardware and software platforms are designed to detect, disrupt, and protect the electromagnetic spectrum across various domains including land, air, sea, and space.We are in search of a talented Flight Test Engineer to become a vital part of our expanding team. The ideal candidate should possess extensive experience in the production and testing of complex systems, early-stage prototyping, and have a robust background in software development.

Join Vardaspace as a Vehicle Integration & Test Intern for the Fall 2026 semester! This exciting opportunity allows you to gain hands-on experience in the dynamic field of vehicle systems integration and testing. Collaborate with a team of experts, contribute to innovative projects, and enhance your skills in a fast-paced environment.

vardaspace is hiring an Environmental Test Lab Manager to lead daily operations at its El Segundo, California facility. The role involves upholding rigorous standards in environmental testing and ensuring the lab remains a safe, compliant workplace. Main responsibilities Direct all functions of the environmental test lab, from scheduling to workflow management Supervise and support lab staff, providing guidance and oversight Monitor and enforce compliance with relevant regulatory requirements Foster a safety-first culture and encourage ongoing improvements in lab processes Location This role is onsite in El Segundo, California, United States.

Join our dynamic team at Sonsoft Inc., where innovation meets performance! We are seeking a talented Performance Testing Engineer to enhance our testing processes using industry-standard tools like JMeter, HP Loadrunner, ALM, and Rally. If you have a passion for ensuring software quality and performance, this is the perfect opportunity for you!

Join usm2 as a Hardware Product Testing Specialist, where you will play a pivotal role in ensuring the quality and performance of our innovative hardware products. Your expertise will help shape the future of technology as you conduct rigorous testing processes to identify and troubleshoot issues, ensuring our products meet the highest standards before reaching our valued customers.

Senior Materials Engineer (Metallurgy)Join Radiant Industries as a dynamic Senior Materials Engineer, where you'll be responsible for the testing and qualification of materials, particularly metals, for our innovative Kaleidos 1MW nuclear microreactor. We’re looking for an individual who takes pride in their work, is highly skilled in materials selection, testing, and analysis, and thrives in a fast-paced, collaborative environment. You will play a crucial role in ushering in the era of the world's first mass-produced, rapidly-deployable nuclear reactor.Responsibilities & DutiesPlan and execute comprehensive materials testing to derive essential material properties for informed design decisions.Spearhead the qualification of all metallic components utilized in the design of the Kaleidos reactor.Conduct rapid prototypic testing to mitigate risks associated with design and integration.Collaborate closely with the manufacturing team to develop and validate application-specific manufacturing processes including welding, brazing, coating, casting, and heat treatments.Provide expert advice on materials selection for various components within the Kaleidos project.Identify and manage equipment necessary for materials characterization and testing.Assess and ensure the quality and accuracy of material property data for our materials database.Define and enhance manufacturing processes to achieve the desired material properties.Required Qualifications & SkillsBachelor’s degree from an accredited institution in Materials Science and Engineering, or Mechanical, Aeronautical, Nuclear, or Chemical Engineering with a focus on materials science.5+ years of experience in the development, testing, and analysis of materials for challenging load scenarios and environments.Desired Qualifications & SkillsMaster’s or PhD degree in a related field is preferred.

Join our team as an Assembly & Test Technician at amca, where your skills will contribute to the assembly and testing of high-quality products. You will work in a dynamic environment, collaborating with engineers and production staff to ensure that our products meet stringent quality standards.

Join vardaspace as an Automation & Test Intern for the Fall 2026 semester. This exciting opportunity offers you the chance to work alongside experienced professionals in a dynamic environment, where you will assist in developing and executing automated tests, as well as contribute to enhancing our testing frameworks.