Senior Mechanical Design Engineer

VastLong Beach, California, United States

On-site Full-time

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Experience Level

Senior

Qualifications

Bachelor's degree in Mechanical Engineering or related field. Minimum of 5 years of experience in mechanical design engineering. Proficiency in CAD software, such as SolidWorks or AutoCAD. Strong problem-solving skills and a keen eye for detail. Experience with product lifecycle management and design validation processes.

About the job

Vast is seeking a highly skilled and innovative Senior Mechanical Design Engineer to join our dynamic team in Long Beach, California. In this role, you will leverage your expertise in mechanical design to drive the development of cutting-edge products that enhance our operational capabilities and meet market demands.

About Vast

At Vast, we are committed to pushing the boundaries of innovation in the mechanical engineering field. Our team is dedicated to creating sustainable and efficient solutions that redefine industry standards. Join us in our mission to shape the future of technology.

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Design Release Engineer for Interior Hard Trim

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Join ALTEN Technology USA, a pioneering engineering firm dedicated to transforming innovative concepts into reality. Our expertise spans across diverse sectors, including aerospace, medical devices, robotics, automotive, and more, with a team of over 3,000 skilled professionals across North America. We are part of the global ALTEN Group, which comprises over…

Feb 17, 2026

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Body Interior Soft Trim Engineer

ALTEN Technology USA

Full-time|$115K/yr - $135K/yr|On-site|Long Beach, California

Join ALTEN Technology USA, an innovative engineering firm dedicated to transforming visionary concepts into reality. Our diverse portfolio includes advancements in space exploration, life-saving medical technologies, and the development of autonomous electric vehicles. With over 3,000 professionals across North America, we collaborate with premier organizations in sectors such as aerospace, medical devices, robotics, automotive, and commercial vehicles.As a member of the global ALTEN Group, which boasts over 57,000 engineers across 30 countries, we provide comprehensive solutions throughout the entire product development cycle, from initial consulting to complete project outsourcing.At ALTEN Technology USA, you will tackle some of the most complex engineering challenges, benefiting from mentorship, extensive career development opportunities, and a robust benefits package. We pride ourselves on cultivating an environment where employees are appreciated, supported, and inspired to advance their careers. Body Interior - Soft Trim Engineer: ONSITE in Long Beach, CA In this pivotal role, you will oversee the complete development process of vehicle components and systems, from initial concept to production release. This position demands exceptional 3D design skills, a profound understanding of engineering requirements, and the ability to work collaboratively across multifunctional teams to deliver high-quality, manufacturable, and cost-effective solutions.

Feb 17, 2026

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Design and Release Engineer - Glazing

ALTEN Technology USA

Full-time|$115K/yr - $115K/yr|On-site|Long Beach, California, United States

Join ALTEN Technology USA, a pioneering engineering firm dedicated to transforming innovative ideas into reality. From enhancing space exploration and developing life-saving medical devices to creating cutting-edge autonomous electric vehicles, our team of over 3,000 experts across North America collaborates with top-tier companies in aerospace, medical devices, robotics, automotive, and more.As a vital member of the global ALTEN Group, which boasts over 57,000 engineers across 30 countries, we manage the entire product development cycle—from consulting to comprehensive project outsourcing.At ALTEN Technology USA, you will face some of the most challenging engineering problems in the industry, backed by mentorship, abundant career advancement opportunities, and a robust benefits package. We pride ourselves on cultivating a workplace culture where every employee feels appreciated, supported, and empowered to grow.Location: Long Beach, CAAs a Design and Release Engineer - Glazing, you will oversee the complete development of vehicle components and systems, from initial concept to production release. This position demands a strong proficiency in 3D design, a thorough understanding of engineering requirements, and the ability to collaborate with cross-functional teams to deliver high-caliber, manufacturable, and cost-efficient solutions.

Feb 17, 2026

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Design Engineer - Body Exterior (Trim Components)

ALTEN Technology USA

Full-time|$115K/yr - $115K/yr|On-site|Long Beach, California, United States

At ALTEN Technology USA, we are an innovative engineering firm dedicated to transforming groundbreaking ideas into reality. Our expertise spans across various industries, including aerospace, medical devices, robotics, automotive, commercial vehicles, electric vehicles (EVs), and rail. With a talent pool of over 3,000 professionals throughout North America, we collaborate with top-tier companies to tackle some of the most challenging engineering projects in the world.As a member of the global ALTEN Group, which boasts over 57,000 engineers in 30 countries, we offer comprehensive services that encompass the entire product development cycle, from consulting to full-scale project outsourcing.Joining ALTEN Technology USA means becoming part of a team that values mentorship, supports career growth, and provides a robust benefits package. We pride ourselves on nurturing a work culture where every employee feels appreciated, supported, and motivated to advance their career.Location: Long Beach, CAIn the role of Design Engineer - Body Exterior (Trim Components), you will be instrumental in the complete development of vehicle body components, overseeing the process from initial concept through to production release. This position requires exceptional 3D design skills, a thorough understanding of engineering standards, and the ability to work collaboratively across diverse teams to produce high-quality, manufacturable, and cost-effective solutions.

Feb 18, 2026

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Design Release Engineer - Low Voltage Systems Integration

ALTEN Technology USA

Full-time|$120K/yr - $145K/yr|On-site|Long Beach, California, United States

Join ALTEN Technology USA, a premier engineering firm dedicated to transforming innovative concepts into reality—from enhancing space exploration and developing life-saving medical devices to constructing autonomous electric vehicles. With a team of over 3,000 specialists across North America, we collaborate with leading enterprises in aerospace, medical technology, robotics, automotive, commercial vehicles, electric vehicles, and rail among others.As a proud member of the global ALTEN Group—comprising over 57,000 engineers across 30 countries—we manage the entire product development lifecycle, providing everything from consulting services to complete project outsourcing.When you join ALTEN Technology USA, you will engage in some of the most challenging engineering problems globally, bolstered by mentorship, opportunities for career advancement, and a comprehensive benefits package. We are committed to nurturing an environment where our employees feel appreciated, supported, and motivated to develop their careers. As a Design Release Engineer for Low Voltage Systems Integration, you will be instrumental in the design and development of Low Voltage systems, ensuring dependable performance. Your responsibilities will include leading system-level design initiatives while collaborating with various cross-functional teams to define product design, vehicle behavior, prototype integration, and validation with a focus on system-level performance. You will oversee the integration and validation processes for each vehicle build, ensuring the functionality and performance of Low Voltage systems throughout the product lifecycle. You will also conceptualize, design, engineer, develop, and assist in the launch of next-generation vehicle platform architectures for electric vehicles.Key Responsibilities:Validate low voltage system performance using appropriate analytical and experimental approaches.

Feb 23, 2026

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Design Engineer for Exterior & Interior Accessories

ALTEN Technology USA

Full-time|$115K/yr - $115K/yr|On-site|Long Beach, California, United States

Join ALTEN Technology USA, a pioneering engineering firm dedicated to turning innovative concepts into reality—from enhancing space exploration and developing critical medical devices to creating autonomous electric vehicles. With over 3,000 skilled professionals across North America, we collaborate with top companies in aerospace, robotics, automotive, and more.As a proud member of the global ALTEN Group, which boasts over 57,000 engineers in 30 countries, we cover the full spectrum of product development from consulting to comprehensive project outsourcing.At ALTEN Technology USA, you will immerse yourself in some of the most challenging engineering tasks, backed by mentorship, opportunities for career advancement, and a robust benefits package. We pride ourselves on cultivating a workplace culture where employees feel appreciated, supported, and motivated to evolve.Location: Long Beach, CAAs a Design Engineer for Exterior & Interior Accessories, you will oversee the complete development process of vehicle components and systems, from initial concept to production release. This role calls for exceptional 3D design skills, a solid understanding of engineering principles, and the ability to work collaboratively across various teams to deliver high-quality, manufacturable, and cost-effective solutions.

Feb 17, 2026

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PCB Design Engineer

vast

Full-time|On-site|Long Beach, California, United States

Join the innovative team at vast as a PCB Design Engineer. In this pivotal role, you will utilize your expertise in printed circuit board design to contribute to cutting-edge technology solutions. Your creativity and technical skills will be instrumental in developing efficient and reliable PCB layouts that meet industry standards and client specifications.

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Senior Electronics Design Engineer

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Full-time|On-site|Long Beach, California

Long Wall Company, established in 2025, is dedicated to advancing missile defense technologies for the United States and its allies. Building upon the foundational RS1 and GS0 launch systems, we specialize in developing containerized, mass-producible missile defense systems and providing rapid, cost-effective flight testing solutions. Our vision for global security emphasizes the necessity for defensive technologies that are affordable, high-performing, rigorously tested, and widely accessible. Join our mission-driven team.What We SeekInnovative Problem Solvers. The aerospace industry requires creativity and resourcefulness. We are looking for engineers who tackle challenges with inquisitiveness, view setbacks as opportunities for learning, and are committed to delivering optimal solutions for our missions.Ownership and Collaboration. We value engineers who take complete accountability for producing flight-ready outcomes while acknowledging that success is a collective effort. The most effective engineers enhance their colleagues' capabilities, recognizing that diverse skill sets contribute to mission success.Position OverviewAs a Senior Electronics Design Engineer, you will spearhead the design, development, construction, testing, and commissioning of electrical systems integral to our missile defense technologies at Long Wall. You will collaborate closely with a dedicated team of mechanical, fluid, and electrical engineers to create pioneering deployable missile defense solutions. Your responsibilities will encompass electrical design, testing, and integration from concept through production, ensuring alignment with strategic business objectives. This role is pivotal, contributing to every mission and flight as we redefine the landscape of missile defense systems.

Feb 26, 2026

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Senior Mechanical Design Engineer

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Vast is seeking a highly skilled and innovative Senior Mechanical Design Engineer to join our dynamic team in Long Beach, California. In this role, you will leverage your expertise in mechanical design to drive the development of cutting-edge products that enhance our operational capabilities and meet market demands.

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Propulsion Design Engineer II / Senior Propulsion Design Engineer I

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ABOUT ROCKET LABRocket Lab is a pioneering space company that offers comprehensive launch services, spacecraft design and manufacturing, and advanced payload solutions. Our mission is to make space accessible and drive ambitious scientific exploration, Earth observation initiatives, and technology demonstrations designed to tackle climate change and enhance national security.Our Electron rocket ranks as the second most frequently launched U.S. rocket annually, successfully delivering over 230 satellites into orbit. We are also developing Neutron, our next-generation medium-lift, reusable launch vehicle, which aims to support larger constellation deployments. Our Space Systems division is dedicated to designing and constructing a wide array of satellites and payload components, including those selected for NASA missions to the Moon and Mars, as well as components utilized in the James Webb Space Telescope.NEUTRONNeutron represents a highly reusable medium-lift launch vehicle that is poised to deliver the mega constellations of tomorrow, high-assurance payloads, and support human spaceflight. By leveraging Rocket Lab’s successful track record with the Electron program, Neutron promises a cost-effective and dependable launch solution. If you are eager to join a dynamic team and contribute to the development of a revolutionary reusable liquid launch vehicle, this is your chance!PROPULSION DESIGN ENGINEER II / SENIOR PROPULSION DESIGN ENGINEER ILocated at Rocket Lab's headquarters in Long Beach, CA, the Propulsion Design Engineer will play a vital role in designing engine components such as combustion chambers, turbo machinery, and engine layouts for the Archimedes Engine. This position provides an exciting opportunity to engage in the design, analysis, and construction of hardware, while also supporting the Neutron and Archimedes teams in their engine development efforts.

Mar 12, 2026

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Senior Design Reliability Engineer

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Feb 6, 2026

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Senior Mechanical Design Engineer, Tooling

Relativity Space

Full-time|$130K/yr - $166K/yr|On-site|Long Beach, California

At Relativity Space, we are revolutionizing the aerospace industry by developing advanced rockets that meet both current and future demands. Our Terran R vehicle aims to deliver customer payloads to orbit, addressing the increasing need for reliable launch capacity. This marks just the beginning; our success with Terran R will pave the way for groundbreaking advancements in science, exploration, and innovation, pushing the boundaries of what is known.Joining Relativity means becoming part of a culture that values autonomy, ownership, and impact at every level. Here, you will not only complete tasks but also tackle unprecedented challenges, contributing to the development of a rocket, a factory, and an innovative business model from the ground up. Whether your expertise lies in propulsion, manufacturing, software, avionics, or corporate functions, you will collaborate across teams, influence decisions, and witness your work materialize rapidly. Relativity fosters an environment where creativity and technical precision coexist, allowing your contributions to shape our collective narrative. This is a unique moment to make a significant impact on our products, processes, and culture, all while being part of the tangible progress of the Terran R. The most meaningful work of your career awaits. Join us.About the Team: The Tooling and Factory Automation team operates at the dynamic intersection of design, manufacturing, and automation, creating everything from extensive structural fixtures to intricate tools that directly facilitate the production of the Terran R. As a key design group within the manufacturing organization, we delve deeply into the needs of our internal partners, identifying core challenges, proposing innovative solutions, and delivering hardware that enhances our efficiency, scalability, and overall performance. We are also leading the charge in Relativity’s expanding factory automation initiatives, which are crucial for scaling Terran R production across current and future facilities. In this role, you will enjoy the freedom to make decisions, implement solutions, and see their real-world applications on the factory floor. Ultimately, you will be instrumental in shaping not just tools and automated processes, but the very foundation of how rockets and factories are built.

Feb 6, 2026

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Manager of Avionics Mechanical Design Engineering

Relativity Space

Full-time|$154K/yr - $211K/yr|On-site|Long Beach, California

Relativity Space is building rockets designed to meet current and future launch demands. The Terran R vehicle delivers customer payloads to orbit, supporting the growing need for launch capacity. Success with Terran R will open new paths for scientific and exploratory advancements. The company values autonomy, ownership, and making a direct impact. Team members tackle challenges that have not been solved before, shaping rockets, manufacturing methods, and business practices. Collaboration is essential, every discipline, including propulsion and avionics, helps guide decisions and drive results. This role offers the chance to influence both the product and the culture as Terran R develops. Avionics Team Focus The Avionics team oversees the entire lifecycle of Terran R’s control systems. Responsibilities include designing, manufacturing, testing, installing, and operating the hardware that links and manages every major electrical system on the rocket and on the ground. Engineers on this team work closely with design, manufacturing, and testing groups, enabling rapid iteration and feedback. The team also collaborates with propulsion, GNC, fluids, and stage engineering to achieve seamless integration and strong performance across the vehicle. Joining the team at this stage means helping to define Terran R’s core avionics architecture and taking responsibility for components that will ultimately fly. Location This role is based in Long Beach, California.

Apr 21, 2026

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Staff Mechanical Design Engineer, Tooling

Relativity Space

Full-time|$155K/yr - $197K/yr|On-site|Long Beach, California

At Relativity Space, we are revolutionizing the aerospace industry by building rockets that not only meet today's demands but also pave the way for tomorrow's innovations. Our Terran R vehicle is set to deliver customer payloads to orbit, addressing the increasing need for launch capacity. This is just the beginning; the commercial success of Terran R will unlock new avenues for scientific exploration and technological advancement, pushing the boundaries of what we know.Joining Relativity means becoming part of a dynamic environment where autonomy, ownership, and significant impact are valued at every level. Here, you won’t merely execute tasks; you’ll tackle unprecedented challenges, contributing to the development of a rocket, a factory, and a thriving business from the ground up. Whether your expertise lies in propulsion, manufacturing, software, avionics, or corporate functions, you will collaborate across teams, influence decisions, and witness your contributions come to life swiftly. Relativity is where creativity meets technical precision, and your voice will shape our collective narrative. This is a unique moment to make a lasting impact on our product, processes, and culture, as Terran R gains momentum and becomes a reality. Your most meaningful work awaits. Join us.About the Team: The Tooling and Factory Automation team is at the forefront of design, manufacturing, and automation, creating everything from large structural fixtures to intricate tools that directly support Terran R’s production. As a design group embedded within the manufacturing sector, we dive deep into our internal partners' needs to identify root issues, propose innovative solutions, and deliver hardware that enhances efficiency and scalability. Our team is also leading the charge in Relativity’s factory automation initiatives, crucial for scaling Terran R production across current and future facilities. You will have the freedom to make impactful decisions, implement solutions, and see them operational on the factory floor. Ultimately, you are not just designing tools or automated processes; you are defining the future of rocket and factory construction.

Feb 6, 2026

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Mid-Career Electrical Engineer - Harness Design

True Anomaly Inc.

Full-time|$105K/yr - $185K/yr|On-site|Denver, CO or Long Beach, CA

True Anomaly builds technology that blends spacecraft, software, and AI to help secure and sustain access to space. The company’s work supports the U.S., its allies, and commercial partners, with a focus on peaceful and sustainable space operations. The team’s efforts touch areas like navigation, communications, and finance. Creativity and ingenuity drive the team to create unique advantages in the field. Challenging assumptions and aiming for ambitious results are part of the culture. Collaboration and teamwork are valued as essential to success. Role overview This mid-career electrical engineering position centers on harness design for spacecraft and test environments. The role is based in Denver, CO or Long Beach, CA. Harness assemblies connect critical electronics and power subsystems, including propulsion, guidance, navigation, and telemetry. Effective harnessing is vital to spacecraft performance and reliability. What you will do Develop 3D harness routes, considering bend radii, separation, and maintainability. Manage technical trade studies as needed. Create electrical interconnect diagrams and schematics, defining point-to-point connections for power, signals, and data. Apply grounding and shielding principles throughout designs. Collaborate with engineering, program management, production, and quality assurance teams to build 3D harness models in SolidWorks. Analyze harnesses to confirm they meet quality and reliability requirements. Develop test equipment for IR/DWV testing. Design and integrate harness routing within both spacecraft and test setups. Support production and quality teams in resolving issues and ensuring builds match design intent. Generate Bills of Materials (BOMs) and use ERP systems to coordinate production activities.

Apr 21, 2026

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Senior Principal Electrical Engineer - Harness Design

True Anomaly Inc.

Full-time|On-site|Denver, CO or Long Beach, CA

True Anomaly Inc. is seeking a skilled and experienced Senior Principal Electrical Engineer specializing in harness design to join our innovative team. In this pivotal role, you will leverage your extensive expertise to develop advanced electrical harness solutions for our cutting-edge projects. You will be responsible for overseeing the design, implementation, and testing phases of harness systems, ensuring they meet both performance and safety standards.As a Senior Principal Engineer, you will mentor junior engineers, lead project teams, and collaborate closely with cross-functional teams to deliver high-quality results. Your contributions will directly impact the success of our initiatives in a fast-paced environment.

Apr 8, 2026

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Senior Mechanical Design Engineer, Factory Automation

Relativity Space

Full-time|$130K/yr - $166K/yr|On-site|Long Beach, California

At Relativity Space, we are at the forefront of revolutionizing space technology by building innovative rockets that cater to both present demands and future discoveries. Our flagship vehicle, the Terran R, is set to deliver customer payloads to orbit, addressing the increasing need for launch capacity. This is merely the beginning; achieving commercial success with Terran R will unlock new opportunities for scientific advancement, exploration, and technological innovation, pushing the boundaries of what is known.Becoming a part of Relativity means engaging in an environment that fosters autonomy, ownership, and impactful contributions at every level. Here, you will not only execute tasks but solve unprecedented challenges, contributing to the development of rockets, factories, and an entire business from the ground up. Whether your expertise lies in propulsion, manufacturing, software, avionics, or corporate functions, you will collaborate across teams, influence decision-making, and witness your work materialize in record time. Relativity is where creativity meets technical excellence, and your voice will play a crucial role in shaping our collective story. This is a unique moment where you can leave a significant mark on our products, processes, and culture, while the Terran R gains momentum and becomes a tangible reality. Your most impactful work awaits. Join us.About the Team: The Tooling and Factory Automation team operates at the convergence of design, manufacturing, and automation, creating everything from large structural fixtures to specialized tools that empower the production of Terran R. As a design group fully integrated within the manufacturing sector, we delve into the needs of our internal partners, identifying root challenges, proposing innovative solutions, and delivering hardware that enhances our speed, efficiency, and effectiveness. This team is pivotal in spearheading Relativity’s expanding factory automation initiatives, a crucial aspect of scaling the production of Terran R across current and future facilities. You will have the autonomy to make impactful decisions, implement solutions, and observe their application on the factory floor. Ultimately, you will not just design tools or automated processes; you will play a key role in defining how rockets and factories are constructed.

Feb 6, 2026

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