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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 innova…

Jan 27, 2026

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Mechanical Engineer - Electric Motor Design for New Graduates

Radiant Industries

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

Radiant Industries is seeking a Mechanical Engineer focused on electric motor design to join the team developing an advanced alternator for a nuclear-driven, high-speed power generation system. This entry-level position is designed for recent graduates who want hands-on experience with high-voltage electric motors and generators. The role is fully on-site at the El Segundo, CA headquarters. What you will do Design and analyze generator components used in high-speed power systems. Create detailed 3D models and 2D fabrication drawings using CAD and NX software. Collaborate with cross-functional engineering teams, including turbomachinery specialists, to develop systems that convert mechanical energy to electrical energy. Communicate with vendors to source parts for generator construction. Carry out bench, dynamic, and system testing on subsystem components and models. Participate in hands-on assembly, rapid prototyping, and integration of electric motors and generators. Support efforts to commercialize mass-produced nuclear reactors that deliver clean energy to remote locations and essential infrastructure. Requirements Bachelor's degree in Mechanical Engineering with a focus on electric motors. Solid understanding of permanent magnet electric motors. Practical experience in electric motor design, manufacturing, and assembly processes. Preferred qualifications Master's degree in Mechanical Engineering specializing in electric motors. Knowledge of motor control systems, including Space Vector Modulation (SVM). Experience working with teams in turbomachinery, power electronics, thermal, packaging, or software engineering. Additional requirements Willingness to work extended hours and weekends as needed. This position requires 100% on-site presence in El Segundo, CA.

Apr 21, 2026

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Senior Mechanical Engineer - Fluid Systems

Radiant Industries

Full-time|On-site|El Segundo HQ

Senior Mechanical Engineer - Fluid SystemsRadiant Industries is on the lookout for an enthusiastic and experienced Senior Mechanical Engineer specializing in Fluid Systems. This pivotal role involves overseeing the design and development of critical Kaleidos fluid systems, guiding projects from initial design to production. These systems are essential for converting reactor core heat into electrical power.As a key member of our engineering team, you'll engage in trade studies, component selection, thermal hydraulic analysis, piping design, vendor evaluation, assembly, and rigorous testing. Your contributions will play a vital role in launching the first new commercial reactor design in over 50 years by 2026.Responsibilities:Lead the engineering process for fluid systems and components, including compressors, valves, and heat exchangers.Conduct complex thermal and fluid analyses to inform design choices, validate system performance, and maintain structural integrity using hand calculations and finite element analysis tools.Perform trade studies to enhance system performance and fulfill program requirements.Create and implement manufacturing and assembly instructions along with test plans.Manage and maintain a comprehensive Bill of Materials (BOM).Identify and cultivate relationships with suppliers for all components.Oversee the design, manufacturing, and testing schedules for subassemblies.Conduct risk analysis (FMEA) for subsystems.Gather requirements and provide guidance and constructive feedback to engineers across various disciplines.Qualifications:Bachelor’s degree in Mechanical, Materials, Aeronautical, Civil, or Structural Engineering from an accredited institution.Proven experience in fluid system architecture design.A minimum of 4 years of experience in designing, building, and testing fluid systems.In-depth knowledge of fluid dynamics and thermodynamics.Solid understanding of heat exchanger design and analysis techniques.

Jun 16, 2025

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Mechanical Engineer - Fluid Systems at Radiant Industries | El Segundo

Radiant Industries

Full-time|On-site|El Segundo HQ

Join Radiant Industries as a Mechanical Engineer specializing in Fluid SystemsWe are on the lookout for a dynamic Mechanical Engineer to take the helm of our Kaleidos fluid systems, guiding them from initial design through to production. This role involves working with critical subsystems, including the primary loop and power conversion loop, which play a pivotal role in transforming reactor core heat into electrical power. Your expertise will be crucial in shaping the future of commercial reactor design, aiming for the first new design in over 50 years by 2026.Key Responsibilities:Lead the engineering of fluid systems and components, such as compressors, valves, and heat exchangers.Conduct advanced thermal and fluid analysis to inform design choices, validate system performance, and maintain structural integrity through first-principle calculations and finite element analysis.Perform trade studies to enhance system efficiency and meet project specifications.Create and implement manufacturing/assembly instructions and testing protocols.Develop and maintain a comprehensive Bill of Materials (BOM).Source and cultivate relationships with suppliers for all components.Oversee design, manufacturing, and testing schedules for subassemblies.Conduct risk assessments (FMEA) for subsystems.Gather requirements and provide constructive feedback to cross-functional engineering teams through effective communication.

Feb 27, 2026

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Mechanical Engineer - Fluid Systems (2026 New Graduate)

Radiant Industries

Full-time|On-site|El Segundo HQ

Join Radiant Industries as a passionate and driven Mechanical Engineer in Fluid Systems - 2026 New Graduate within our KDU Engineering team. You will play a pivotal role in the design, assembly, and testing of the Kaleidos Development Unit (KDU) – marking the United States’ first new fueled reactor design in over half a century. This is your chance to take ownership of significant projects that drive KDU’s readiness for fueled operations while collaborating with a diverse team of engineers.Key ResponsibilitiesParticipate actively in the design, analysis, and testing of fluid subsystems for the KDU.Take full ownership of deliverables from initial concept through to build and validation, with mentorship from senior engineers.Work collaboratively across disciplines to integrate designs and solve technical challenges.Assist in system-level testing, troubleshooting, and iterative design processes to expedite KDU development.Effectively communicate results through design reviews, technical reports, and presentations to team members and leadership.Required Skills and QualificationsBachelor's degree in Mechanical Engineering, Aerospace Engineering, or a related field (completed or expected by Spring 2026).Strong grounding in engineering fundamentals, particularly in thermodynamics and fluid mechanics.Hands-on experience in design and construction through projects, research, lab work, or internships.Proficiency with engineering tools such as CAD, analysis software, and laboratory instrumentation.Preferred Skills and QualificationsMaster's degree in Mechanical Engineering, Aerospace Engineering, or a related discipline (completed or currently pursuing).Relevant internship, co-op, or project experience pertaining to fluid systems.Ability to independently tackle complex engineering challenges and proactively seek resources.Adept at thriving in a dynamic, startup environment with a collaborative, mission-oriented approach.Genuine enthusiasm for Radiant’s mission to swiftly deploy nuclear microreactors in remote areas requiring sustainable, clean energy.Familiarity with reactor physics is advantageous but not mandatory.Additional InformationThis position is located on-site at Radiant’s headquarters in El Segundo, California.

Mar 10, 2026

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Research Engineer in Aerosol & Spray Systems

Rainmaker

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

Rainmaker creates cloud seeding technology aimed at improving water availability and addressing difficult weather patterns. The company’s work brings together radar validation, unmanned aerial systems (UAS), numerical weather modeling, and environmentally mindful seeding materials to help increase precipitation. The engineering team focuses on advancing UAS platforms, developing dispersion payloads, and building both in-situ and remote sensing systems. Projects move quickly and are designed for practical, real-world results. Role overview This Research Engineer in Aerosol & Spray Systems role is suited for those with a background in mechanical or aerospace engineering, especially with expertise in aerosol science, multiphase flow, and compressible fluid dynamics. The position sits at the intersection of cloud physics and advanced fluid systems. Work centers on designing hardware that applies high-velocity gas dynamics to break up nanoparticle agglomerates and atomize liquid precursors into submicron aerosols. Key challenges Efficient dispersion of cohesive dry powders and ultra-fine droplets Managing complex mass transfer and the momentum of particles or droplets Solving mechanical problems while meeting strict aerospace Size, Weight, and Power (SWaP) constraints Location This role is based in El Segundo, CA.

Apr 24, 2026

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Senior Mechanisms Engineer

Radiant Industries

Full-time|On-site|El Segundo HQ

Senior Mechanisms EngineerRadiant Industries is on the lookout for a dynamic and experienced Senior Mechanisms Engineer to spearhead the design and development of essential mechanisms within the innovative Kaleidos project. In this role, you will tackle unique engineering challenges to create efficient and dependable mechanisms that govern reactivity and activate critical safety features. Your responsibilities will encompass trade studies, material selection, in-depth structural analysis, assembly, integration, and rigorous testing. Your contributions will be vital in propelling the introduction of the first new commercial reactor design in over five decades by the year 2026.Key Responsibilities:Lead the design and development of crucial mechanisms such as control blade actuators and air jacket valves.Conduct comprehensive trade studies and formulate designs that align with program requirements.Execute detailed thermomechanical analysis (including static strength and durability/fatigue) and kinematic analysis to assess structural integrity and performance margins using both hand calculations and finite element analysis tools.Develop and implement manufacturing and assembly instructions along with test plans.Create and oversee a Bill of Materials (BOM).Identify and cultivate relationships with suppliers for necessary components.Manage schedules for subassembly design, manufacturing, and testing.Conduct risk analysis (FMEA) for subsystems.Gather requirements and provide insights to engineers across other functional areas through effective communication.Qualifications:Bachelor's degree in Mechanical or Aeronautical Engineering from an accredited institution.A minimum of 4 years of experience in mechanism design.Over 4 years of experience conducting stress analysis utilizing both hand calculations and finite element tools (such as Abaqus, Ansys, FEMAP, or equivalent).Desired Skills:Proficient in the design of multi-component assemblies using CAD software (NX or similar).Experience in designing hardware that underwent manufacturing, deployment, and iterative improvements.Familiarity with pneumatic system design.Knowledge in integrating electromechanical components such as motors or encoders.

Jan 27, 2026

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Electrical Engineer - Next-Gen Drone Defense Solutions

CX2

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

CX2 is an innovative defense technology firm dedicated to providing spectrum superiority for the United States and its allies. Our advanced AI-driven hardware and software solutions excel in detecting, disrupting, and defending the electromagnetic spectrum across various domains including land, air, sea, and space.We are currently in search of a highly proficient Electrical Engineer to conceptualize, develop, and enhance cutting-edge electronic systems aimed at next-generation drone defense (counter-UAS) strategies. This position requires engagement with pioneering technologies such as RF systems, embedded electronics, sensors, and power systems to effectively detect, track, and neutralize unmanned aerial threats.

Apr 9, 2026

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Mechanisms Engineer - Payloads

Varda Space Industries

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

Join Varda Space Industries as a Mechanisms Engineer specializing in Payloads, where you will play a crucial role in the design and development of advanced mechanisms for our space systems. Your expertise will drive innovation and ensure the successful deployment of payloads in the ever-evolving landscape of space exploration.

May 1, 2026

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Electrical Engineer - Advanced Development

Voyager Technologies Inc.

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

Join Voyager Technologies Inc. as an Electrical Engineer in Advanced Development where you will be at the forefront of pioneering electrical engineering solutions. This role involves designing, developing, and testing innovative electrical systems and components that will shape the future of technology.

Apr 8, 2026

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Senior Electrical Engineer - Innovative Nuclear Solutions

Radiant Industries

Full-time|On-site|El Segundo HQ

About Radiant IndustriesRadiant Industries, based in El Segundo, California, is a pioneering startup dedicated to revolutionizing the energy sector with the world's first mass-produced, portable nuclear microreactors. Our flagship reactor, Kaleidos, is a groundbreaking 1-megawatt microreactor designed for mobility and operational efficiency, capable of running for up to five years without the need for refueling. This innovative portable nuclear power solution is set to replace conventional diesel generators, providing essential energy support for hospitals, data centers, remote locations, and military installations. With a unique focus on modern software engineering, Radiant is committed to delivering safe, factory-built microreactors using proven materials. Founded in 2020, we are on a path to test our first reactor at the Idaho National Laboratory next year, with customer deliveries commencing in 2028.About the RoleWe are looking for a skilled Senior Electrical Engineer to lead the design and implementation of electrical control and measurement systems for our microreactor projects. The successful candidate will take ownership of designs from requirements capture to operational deployment. You will be involved in a variety of tasks ranging from circuit board design to integration with fault-tolerant, commercially available hardware. This role will require close collaboration with cross-disciplinary teams focused on the nuclear reactor core, fluid heat transfer systems, and structural components.Key Responsibilities:Collaborate with multidisciplinary teams to design, implement, and test electrical control systems for microreactors.Create and develop industrial-grade electrical control hardware, including schematics, wiring diagrams, harnessing, and integration assemblies.Lead the design of fault-tolerant and safety-critical electrical systems, prioritizing reliability, maintainability, and compliance with regulations.Develop and review electrical interface designs connecting control systems, power equipment, and instrumentation.Ensure compliance of designs with relevant electrical codes and safety standards, including NFPA and NEC.Conduct SCCR and Arc Flash calculations.Qualifications:Bachelor’s degree in Electrical Engineering or a related field.A minimum of 5 years of experience in designing electrical hardware.Proven expertise in electrical control systems and safety-critical applications.Strong understanding of industry standards and codes related to electrical design.Excellent problem-solving skills and a collaborative mindset.

Feb 6, 2026

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Senior Electrical Engineer at Picogrid | El Segundo, CA

Picogrid

Full-time|$180K/yr - $220K/yr|On-site|El Segundo, CA

About UsPicogrid is a pioneering defense technology company backed by venture capital, dedicated to closing the longstanding gap between cutting-edge technology and the essential requirements of national security. We are currently developing critical infrastructure that integrates sensors, autonomy, and operators, with our innovative solutions actively utilized in operations globally. Our objective is to provide an operational edge to safeguard the United States and its allies.Position OverviewWe are on the lookout for a Senior Electrical Engineer who will play a key role in designing, constructing, and launching mission-critical hardware systems that bolster U.S. defense initiatives. This hands-on position resides at the crossroads of embedded systems, mechanical integration, and high-reliability design, giving you ownership over vital electrical components that drive connected autonomous systems in the field.You will manage the complete design lifecycle of various hardware products: from rapid prototyping and validation to production and deployment in the field. Your responsibilities extend beyond the bench; you will work closely with software, mechanical, and deployment teams to guarantee that systems function reliably in challenging environments ranging from deserts to flightlines and active field operations. Anticipate rapid iterations and minimal barriers between your engineering contributions and the end user, making a tangible impact on real-world missions.

Jan 25, 2023

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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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Electrical Engineer - Advanced Development

Voyager Technologies Inc.

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

Join Voyager Technologies Inc. as an Electrical Engineer in Advanced Development. We are looking for innovative thinkers with a passion for technology and engineering to contribute to cutting-edge projects. In this role, you will work on advanced electrical engineering solutions, collaborating with a dynamic team of professionals to push the boundaries of technology.

Apr 8, 2026

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Senior Mechanical Engineer – Turbomachinery Rotordynamics

Radiant Industries

Full-time|On-site|El Segundo HQ

Senior Mechanical Engineer – Turbomachinery RotordynamicsRadiant Industries is on the lookout for a dynamic and experienced Senior Mechanical Engineer to join our innovative team. This pivotal role focuses on the power generation and primary cooling turbomachinery linked to our advanced Kaleidos product. As a key contributor, you will conduct thorough rotordynamic analyses and select appropriate bearings for high-speed rotating machinery, which includes compressors, turbines, and pumps designed for high-temperature applications. The ideal candidate will possess a robust background in rotordynamics and bearing selection, complemented by practical experience in hardware testing.Responsibilities:Design, construct, and evaluate turbomachinery for Radiant’s power generation systems.Conduct dynamic analyses of rotor-bearing systems to assess vibrational behavior, stability, and resonance attributes.Perform critical speed and Campbell diagram analyses, alongside stability assessments, to enhance rotor system designs for reduced vibration and resonance.Examine rotor response during transient operating conditions, including startups, shutdowns, and off-design operations.Select suitable bearing types (e.g., rolling element, fluid film, magnetic) based on operating conditions and performance needs. Assess bearing loads, lifespan, and thermal efficiency.Compile technical reports, design documentation, and presentation materials.Assist in the assembly and testing of prototypes, initial articles, and production hardware.Required Qualifications:Bachelor’s or Master’s degree in Mechanical Engineering or a related field.A minimum of 5 years’ experience in designing and analyzing turbomachinery, rotating equipment, or mechanisms.Solid grasp of rotordynamic principles and relevant tools (e.g., XLrotor, Dyrobes, or equivalent).Exceptional problem-solving, technical communication, and organizational skills.Desired Qualifications:Experience in power generation applications.Expertise in bearing selection for high-temperature, high-speed applications.Practical experience with turbomachinery testing and instrumentation.

Oct 13, 2025

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Lead Principal Mechanisms Engineer - Payloads

Varda Space Industries

Full-time|$170K/yr - $220K/yr|On-site|El Segundo, California, United States

Varda Space Industries builds commercial space infrastructure, including in-orbit pharmaceutical manufacturing and reentry capsules designed for cost efficiency. The company specializes in products enabled by microgravity, such as advanced fiber optics and pharmaceuticals, aiming to bring the benefits of space manufacturing to people on Earth. Founded in 2021 by Will Bruey and Delian Asparouhov, Varda’s team draws on backgrounds from SpaceX, Blue Origin, major pharmaceutical firms, and Silicon Valley. The company is supported by Khosla Ventures, Lux Capital, and Founders Fund. Headquarters and production are based in El Segundo, California, with offices in Washington, DC, and Huntsville, Alabama. Role overview The Lead Principal Mechanisms Engineer for Payloads leads the design and development of complex electromechanical flight hardware. This hardware must operate reliably in orbit, withstand hypersonic reentry, and return to Earth for further analysis and development. This position shapes the payload architecture for missions focused on pharmaceutical manufacturing and hypersonic reentry testbeds. The engineer guides projects from initial concept through detailed design, ensuring mission requirements are met throughout each stage.

Apr 24, 2026

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Senior Mechanisms Engineer - Payloads

Varda Space Industries

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

Role Overview Varda Space Industries is hiring a Senior Mechanisms Engineer focused on payload systems in El Segundo, California. This role leads the design, development, and testing of mechanisms that enable advanced payloads for space applications. What You Will Do Design, develop, and test mechanisms that support complex payloads Work closely with multidisciplinary teams to integrate mechanical systems Help ensure payload mechanisms meet quality and performance requirements

Apr 17, 2026

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Manufacturing Engineer for Mechanical Assemblies

CX2

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

CX2 is a pioneering defense technology firm dedicated to providing spectrum superiority for the United States and its allies. Our AI-driven hardware and software solutions are designed to detect, disrupt, and safeguard the electromagnetic spectrum across diverse domains including land, air, sea, and space.We are in search of a proactive and creative Manufacturing Engineer who is eager to lead manufacturing initiatives and drive process enhancements. This role encompasses the entire lifecycle from Design for Manufacturing (DFM) and commissioning to manufacturing ramp-up, testing, and validation. The ideal candidate will possess a robust engineering background coupled with practical experience in both mechanical and electronic assembly production.Process Innovation- Innovate, develop, and implement processes and enhancements for new and existing products.- Assess production workflows to pinpoint improvement opportunities aimed at decreasing waste, costs, and downtime.- Create and maintain process parameters, Standard Operating Procedures (SOPs), and quality control standards.Drone Production Support- Collaborate closely with engineering and production teams to troubleshoot issues pertaining to electromechanical assemblies and validations, including mechanical assemblies, CNC machined components, carbon fiber layup, final assembly, and unit testing.- Provide ongoing production support for drone manufacturing.- Guide and mentor technicians and engineers in adhering to best engineering practices to fulfill AS9100D and ISO9001 defense manufacturing standards.- Offer technical assistance during new product introductions (NPI) and engineering change implementations.Tooling & Equipment- Specify and design tools, jigs, and fixtures to enhance assembly and manufacturing efficiency.- Oversee the procurement and validation of new equipment, including Factory Acceptance Testing (FAT) and Site Acceptance Testing (SAT).Cross-functional Collaboration- Work collaboratively with R&D, Product Design, Quality Assurance, and Supply Chain teams to ensure manufacturability and scalability of products.- Engage in Design for Manufacturing and Assembly (DFMA) reviews during product development.- Coordinate with vendors and contract manufacturers to optimize production capabilities.

Feb 24, 2026

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Senior Mechanical Engineer (Structures) at Radiant Industries | El Segundo

Radiant Industries

Full-time|On-site|El Segundo HQ

Radiant Industries is on the forefront of innovative engineering solutions, and we are looking for a highly skilled Senior Mechanical Engineer (Structures) to join our team. In this pivotal role, you will design and develop critical structural components within our Kaleidos project, tackling unique challenges to create efficient and reliable structures that can withstand extreme temperature environments and adhere to volumetric constraints.As a Senior Mechanical Engineer, you will play a crucial role in the advancement of the first new commercial reactor design in over 50 years, set to launch by 2026. Your responsibilities will include conducting trade studies, material selection, detailed structural analysis, assembly, integration, and testing.

Dec 11, 2025

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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

Mechanical Engineer - Fluid Systems (2026 New Graduate)

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