Senior Structures Engineer

VardaSpaceEl Segundo, California, United States

On-site Full-time

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Experience Level

Senior

Qualifications

We're looking for candidates with a strong background in structural engineering, ideally with experience in aerospace applications. A Bachelor’s degree in Engineering or a related field is required, and familiarity with CAD software and structural analysis tools is essential. Strong analytical skills, teamwork, and a commitment to excellence will be crucial for success in this role.

About the job

Join VardaSpace as a Senior Structures Engineer and be at the forefront of innovative aerospace solutions. In this pivotal role, you will lead the design and analysis of structural components for space vehicles, ensuring safety and performance in the demanding environment of space. You will collaborate with a passionate team of engineers and contribute to groundbreaking projects that push the boundaries of technology.

About VardaSpace

VardaSpace is pioneering the future of in-space manufacturing and satellite deployment. Based in El Segundo, California, we are dedicated to transforming how we utilize space for the benefit of humanity. Join us to be part of a visionary team that is reshaping the industry.

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Senior Manager of Quality Engineering

Mattel, Inc.

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Join Mattel, Inc. as the Senior Manager of Quality Engineering, where you will play a pivotal role in ensuring the highest standards of quality in our innovative products. In this dynamic position, you will lead and mentor a team of skilled engineers, driving quality initiatives that align with our commitment to excellence. Your expertise will directly contr…

Apr 1, 2026

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Senior Quality Engineer

Mattel, Inc.

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Mattel, Inc. seeks a Senior Quality Engineer based in El Segundo. This role centers on upholding and improving quality standards across several product lines. The position plays a key part in ensuring that products meet expectations from development through production. Key responsibilities Use quality assurance methods and tools to enhance processes Monitor product quality at every stage, from development to production Collaborate with teams to ensure products are reliable and meet quality goals This role focuses on both maintaining current standards and identifying opportunities to raise the bar for product quality at Mattel.

Apr 22, 2026

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Quality Engineer II

Mattel, Inc.

Full-time|On-site|El Segundo

Mattel, Inc. seeks a Quality Engineer II based in El Segundo. This role centers on maintaining product quality and contributing to continuous improvement efforts across teams. Key responsibilities Collaborate with team members from various departments to develop and implement testing strategies. Detect and resolve quality issues as they appear during the product lifecycle. Assist in improving and updating quality processes to support ongoing enhancements.

Apr 22, 2026

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Quality Control Manager

Radiant Industries

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

Radiant Industries is actively seeking a skilled Quality Control Manager to spearhead dimensional inspection, in-process production inspection, and metrology operations across a wide range of hardware, including mechanical, structural, electrical, and power-generation systems. This pivotal role will focus on the establishment and maintenance of comprehensive inspection systems that guarantee all hardware meets design specifications, internal standards, and quality requirements from the moment of receipt through to final assembly.This position is ideal for a proactive leader who thrives in a dynamic hardware setting and is passionate about developing structured processes while upholding a high level of technical precision.

Feb 26, 2026

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Quality Systems Engineer at Radiant Industries | El Segundo, CA

Radiant Industries

Full-time|On-site|El Segundo HQ

Radiant Industries is on the lookout for a dynamic and innovative Quality Systems Engineer. This role requires a proactive individual who can effectively implement quality assurance protocols in a fast-paced manufacturing environment. As a pivotal player in our mission, you will critically assess which controls are essential for success while discarding outdated practices. The ideal candidate is someone who continuously questions the status quo, always seeking the optimal outcome and never settling for traditional methods.In this influential position, you will oversee the policies and procedures that dictate our company's operations. This role perfectly blends technical expertise with operational execution, appealing to those who thrive in an environment marked by rapid innovation and high standards for quality and safety.

Jan 20, 2026

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Senior Manufacturing Engineer

Radiant Industries

Full-time|On-site|El Segundo HQ

Senior Manufacturing EngineerJoin Radiant Industries as a Senior Manufacturing Engineer, where you will collaborate with design engineers to revolutionize the production of intricate mechanisms and structures essential to our innovative microreactor technology. Your role will be critical in ensuring the reliability, safety, quality, and timely delivery of the Kaleidos demonstration unit, set for testing at the Idaho National Lab in 2026—marking the first new reactor design in over 50 years.Key Responsibilities:Oversee the manufacturing and inspection processes of vital components and assemblies within the Kaleidos microreactor.Collaborate with design engineers to create innovative production methods for complex mechanisms and structures.Develop, validate, and optimize manufacturing processes to fulfill all design and business requirements, including safety, quality, efficiency, and delivery timelines.Formulate and implement manufacturing specifications and fabrication instructions.Manage the manufacturing bill of materials (mBOM) for components and assemblies.Identify, evaluate, and establish partnerships with suppliers for component sourcing and fabrication.Identify, plan, and execute upgrades to capital equipment, machinery, and layout to adapt to evolving production needs.Lead initiatives that promote continuous improvements in manufacturing processes and product quality.

Oct 2, 2025

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Senior Structures Engineer

VardaSpace

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

Mar 25, 2026

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Quality Assurance Engineer - JMeter, LoadRunner, ALM, Rally

Sonsoft Inc.

Full-time|On-site|El Segundo

Join Sonsoft Inc. as a Quality Assurance Engineer specializing in performance testing with tools like JMeter and LoadRunner. In this role, you will ensure the reliability and functionality of our software products by developing and executing performance test plans, identifying bottlenecks, and collaborating with cross-functional teams to enhance product quality. Your expertise will be critical in helping us deliver exceptional software solutions to our clients.

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Senior Software Engineer, Infrastructure

Siftstack

Full-time|$170K/yr - $220K/yr|On-site|El Segundo, CA

At Sift, we are pioneering the future of infrastructure for modern machines, transforming the way they are constructed, tested, and managed. Our innovative platform offers engineers unparalleled real-time observability over high-frequency telemetry, effectively eliminating bottlenecks and facilitating rapid, dependable development.Originating from our groundbreaking work at SpaceX on projects like Dragon, Falcon, Starlink, and Starship, Sift emerged from the need for advanced infrastructure to accommodate complex telemetry, debug flight systems, and ensure mission reliability. Our founding team, with expertise from SpaceX, Google, and Palantir, crafts solutions for mission-critical systems where precision and scalability are paramount.As a pivotal member of our engineering team, you will not only write code but also play a significant role in shaping the architecture, product direction, and culture of a company dedicated to addressing real engineering challenges. If you thrive on tackling intricate technical problems and aspire to build foundational systems that support complex machinery, we encourage you to apply.

Oct 27, 2025

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Senior Thermal Engineer

Radiant Industries

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

Join Radiant Industries as a Senior Thermal Engineer, where you will play a crucial role in developing innovative thermal solutions for our cutting-edge projects. You will collaborate with a dynamic team of engineers and scientists to enhance product performance through advanced thermal management techniques.

Apr 8, 2026

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Lead Senior Thermal Engineer

Matter Intelligence

Full-time|On-site|El Segundo

About Matter IntelligenceMatter Intelligence is at the forefront of developing cutting-edge airborne and spaceborne sensing systems that integrate precision optics, innovative thermal architectures, spacecraft engineering, and AI-enhanced data analysis. Our advanced systems function effectively in challenging orbital and airborne environments, unlocking new possibilities for Earth observation capabilities.With a proven track record of delivering technologies to Mars for NASA/JPL, designing advanced sensors for U.S. defense, and establishing core infrastructure at OpenAI, our team is now focused on creating the next generation of sensing systems for both space and airborne applications.About the RoleWe are looking for a Senior Thermal Engineer who will take charge of the thermal architecture, analysis, and verification of our precision optical payloads and spacecraft systems. This role encompasses ownership of thermal performance from the initial concept stage through integration, testing, and, where applicable, on-orbit operations.You will be responsible for developing and maintaining intricate thermal models, steering thermal trade studies, supporting STOP performance, and collaborating closely with systems, optomechanical, electronics, and AI & T teams to ensure that flight hardware meets all performance requirements throughout every mission phase.This is a hands-on, analytical, and leadership-focused role suited for an engineer seeking significant technical ownership over hardware that operates in flight.Key ResponsibilitiesThermal Architecture & DesignDefine and lead the thermal architecture for optical payloads and spacecraft subsystems.Design both passive and active thermal control solutions, including radiators, heat pipes, thermal straps, insulation, and cryogenic interfaces.Translate mission-level thermal requirements into subsystem- and component-level designs.Support thermal trades to effectively balance performance, mass, power, and complexity.Thermal Modeling & AnalysisDevelop, maintain, and correlate detailed thermal models using industry-standard tools (e.g., Thermal Desktop, SINDA/FLUINT).Conduct steady-state and transient thermal analyses across all mission phases (launch, ascent, on-orbit hot/cold cases, safe modes).Perform in-depth thermal analysis of precision optical elements (mirrors, mounts, focal plane assemblies), including thermo-elastic distortion.Execute thermal assessments at the circuit card and chassis level.

Jan 28, 2026

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Senior Materials Engineer in Metallurgy

Radiant Industries

Full-time|On-site|El Segundo HQ

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.

Feb 27, 2026

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Senior Thermal Engineer

Varda Space

Full-time|$133.7K/yr - $170K/yr|On-site|El Segundo, California, United States

About VardaLow Earth orbit is open for business. Varda is pioneering the advancement of commercial space infrastructure, from in-orbit pharmaceutical processing to dependable and cost-effective reentry capsules.From life-saving pharmaceuticals to enhanced fiber optics, a myriad of products utilized on Earth today can only be produced in space. Varda is driving innovation in the orbital economy by establishing both the products and infrastructure required for space to directly enhance life on Earth. Our mission is to expand the economic horizons of humanity.Our team is exceptionally equipped to achieve this objective, with leadership and personnel comprising veterans from SpaceX, Blue Origin, leading pharmaceutical companies, and Silicon Valley. 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.Varda's headquarters is located in El Segundo, California, where we operate offices and a production facility for building, integrating, and testing our vehicles, equipment, and materials. Additionally, Varda has offices in Washington, DC, and Huntsville, AL.Join Varda and contribute to the creation of a thriving in-space ecosystem.

Feb 6, 2026

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Senior Nuclear Engineer

Radiant Industries

Full-time|On-site|El Segundo HQ

Senior Nuclear EngineerJoin Radiant Industries as a Senior Nuclear Engineer! In this pivotal role, you will take the lead on modeling techniques and reactor physics calculations that drive neutronics parameters such as reactivity, kinetics parameters, and energy deposition distributions. These calculations are integral to our innovative Digital Twin simulation software. Your expertise will ensure the safety and reliability of our modeling methods, which are crucial for the commercialization of the first mass-produced nuclear reactor.Key Responsibilities:Lead the development of core neutronics models and reactor physics calculations, essential for Radiant’s transient safety analyses.Execute calculations of energy deposition distributions, reactivity coefficients, kinetics parameters, and control blade worths for integration into Digital Twin models.Verify modeling assumptions and evaluate the conservatism of neutronics models.Document methodologies for both technical and non-technical stakeholders.Support Verification & Validation (V&V) initiatives for the Digital Twin.Collaborate with teams across the company on reactor physics, shielding, and radiation detection analyses.Qualifications:Bachelor’s degree in Nuclear Engineering or a related discipline from an accredited institution.A minimum of 4 years of experience with Monte Carlo nuclear engineering software such as OpenMC, MCNP, Serpent, SCALE, etc.Proven ability to document analysis methods and assumptions effectively.Strong programming skills in any language, with a preference for Python.Preferred Qualifications:Familiarity with reactor kinetics.Basic understanding of thermal hydraulic principles.Experience in communicating complex information to cross-functional teams.Self-motivated with a strong sense of ownership for project outcomes.

Jun 16, 2025

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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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Senior Thermal-Hydraulics Engineer

Radiant Industries

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

We are seeking a highly skilled and experienced Senior Thermal-Hydraulics Engineer to join our dynamic team at Radiant Industries. In this role, you will be responsible for designing, analyzing, and optimizing thermal-hydraulic systems to enhance our product offerings. Your expertise will play a crucial role in ensuring the efficiency and reliability of our engineering solutions.As a key member of our team, you will collaborate with cross-functional teams to develop innovative designs, conduct simulations, and perform experiments. If you are passionate about engineering and eager to take on new challenges, we invite you to apply!

Apr 8, 2026

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Senior Avionics Systems Engineer

Varda Space

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

About Varda SpaceUnlocking the Potential of Low Earth Orbit. At Varda, we are pioneering the advancement of commercial space infrastructure, innovating in areas from in-orbit pharmaceutical production to dependable and cost-effective reentry vehicles.With products ranging from life-saving medications to advanced fiber optics, we are committed to developing the technologies that can only be realized in the unique environment of space. Our mission is to enhance the orbital economy, creating products and infrastructure that directly benefit life on Earth.Our team is comprised of industry leaders and experts with backgrounds in SpaceX, Blue Origin, top pharmaceutical firms, and Silicon Valley tech. Founded in January 2021 by visionaries Will Bruey and Delian Asparouhov, we are supported by premier investors such as Khosla Ventures, Lux Capital, Founders Fund, and others.Headquartered in El Segundo, California, Varda features offices and a production facility dedicated to the development and testing of our vehicles, equipment, and materials. Our presence extends to Washington, DC, and Huntsville, AL.Join us at Varda and contribute to building a vibrant in-space ecosystem.

Dec 9, 2025

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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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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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Senior Frontend Software Engineer

Sift

Full-time|$170K/yr - $220K/yr|On-site|El Segundo, CA

At Sift, we're revolutionizing the development, testing, and operation of modern machines. Our innovative platform provides engineers with real-time insights into high-frequency telemetry, effectively eliminating bottlenecks and accelerating reliable development.Sift originated from our groundbreaking work at SpaceX on projects such as Dragon, Falcon, Starlink, and Starship—experiences that highlighted the need for scalable telemetry, efficient debugging of flight systems, and unwavering mission reliability. Founded by a talented team from SpaceX, Google, and Palantir, Sift is engineered for mission-critical systems where precision and scalability are paramount.As an early engineer at Sift, your contributions will extend beyond coding; you'll play a key role in defining our architecture, shaping our product, and influencing the culture of a company dedicated to addressing genuine engineering challenges. If you're eager to tackle complex technical problems and have the chance to build foundational systems that support intricate machines, we encourage you to reach out.

Oct 27, 2025

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