NewSenior Mechanical Engineer Relativity SpaceSenior Mechanical EngineerLong Beach, CA$132,000–$198,000 / yearAny unsolicited submission - via email, our website, social media, or directly to an employee - will be deemed the property of Relativity Space, and no fee will be owed absent a current, fully executed agreement with Talent Acquisition that specifically authorizes submissions for the applicable role. The Stage Fluids team is responsible for the design and delivery of propellant, pressurant, pneumatics, and other fluid systems that turn structures into functioning rockets!
NewMechanical Engineer, Factory Automation Hadrian AutomationMechanical Engineer, Factory AutomationLos Angeles, CA$130,000–$220,000 / yearBacked by leading investors including JPMorgan Chase, Valor Equity Partners, Andreessen Horowitz, Founders Fund, 137 Ventures, Lux Capital, T. Rowe Price, and Morgan Stanley, we’re building the future of American manufacturing—and looking for exceptional people to help make it happen. Series D at a $7.87B valuation, Hadrian is rapidly expanding our manufacturing footprint, launching new capabilities across welding, casting, forging, electronics, additive manufacturing, and more, while scaling our Factory-as-a-Service platform to transform how critical products are built.
NewSenior Mechanical Engineer, Mechanisms Radiant IndustriesSenior Mechanical Engineer, MechanismsEl Segundo, CA$133.50–$184.80 / hourPortable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Perform detailed thermomechanical analysis (static strength, durability/fatigue) and kinematic analysis to determine structural integrity and performance margins using both hand calculations and finite element tools.
NewSenior Mechanical Engineer - Structures Radiant IndustriesSenior Mechanical Engineer - StructuresEl Segundo, CA$133.50–$184.80 / hourPerform detailed thermomechanical analysis (static strength, durability/fatigue) and dynamic analysis (vibration, shock) to determine structural integrity (margins of safety) using both hand calculations and finite element tools. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases.
NewMechanical Engineer, Fluid Systems - 2026 New Graduate Radiant IndustriesMechanical Engineer, Fluid Systems - 2026 New GraduateEl Segundo, CA$105,000–$125,000 / yearPortable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.
NewMechanical Engineer, Fluid Systems Radiant IndustriesMechanical Engineer, Fluid SystemsEl Segundo, CAPortable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials.
NewSenior Satellite Mechanical Engineer, Optical Structures K2 SpaceSenior Satellite Mechanical Engineer, Optical StructuresLos Angeles, CA$140,000–$175,000 / yearIn this role, you will have cradle-to-grave ownership over the mechanical elements of space environment payloads including optical payloads, with a focus on broader mechanical skills – including but not limited to structural design for stress and modal performance; design for optimal manufacturing; design of lens and optical component mounting solutions that can perform in launch and space environments; thermal analysis and mitigation; and cradle-to-grave ownership from clean-sheet trades, design, analysis, testing, and integration support. Backed by $450M from leading investors including Altimeter Capital, Redpoint Ventures, T. Rowe Price, Lightspeed Venture Partners, Alpine Space Ventures, and others – with an additional $500M in signed contracts across commercial and US government customers – we're mass-producing the highest-power satellite platforms ever built for missions from LEO to deep space.
NewSatellite Mechanical Engineer K2 SpaceSatellite Mechanical EngineerLos Angeles, CA$90,000–$140,000 / yearBacked by $450M from leading investors including Altimeter Capital, Redpoint Ventures, T. Rowe Price, Lightspeed Venture Partners, Alpine Space Ventures, and others – with an additional $500M in signed contracts across commercial and US government customers – we're mass-producing the highest-power satellite platforms ever built for missions from LEO to deep space. Demonstrated ability to own mechanical hardware or systems within an integrated engineering team outside a classroom setting (High Power Rocketry, CubeSats, Robotics Competitions, Formula SAE and Baja SAE, Engineers without Borders, Design-Build-Fly, NASA student launch, personal entrepreneurial ventures, etc.).
NewSenior Satellite Mechanical Engineer (Structures) K2 SpaceSenior Satellite Mechanical Engineer (Structures)Los Angeles, CA$140,000–$175,000 / yearBacked by $450M from leading investors including Altimeter Capital, Redpoint Ventures, T. Rowe Price, Lightspeed Venture Partners, Alpine Space Ventures, and others – with an additional $500M in signed contracts across commercial and US government customers – we're mass-producing the highest-power satellite platforms ever built for missions from LEO to deep space. In your first 6 months, you will define mechanical requirements, create initial concepts and trades, perform preliminary and detailed analysis, define development test campaigns, trade and select any purchased electromechanical subsystems, and produce development hardware.
NewPrincipal Mechanical Engineer K2 SpacePrincipal Mechanical EngineerLos Angeles, CA$185,000–$200,000 / yearBacked by $450M from leading investors including Altimeter Capital, Redpoint Ventures, T. Rowe Price, Lightspeed Venture Partners, Alpine Space Ventures, and others – with an additional $500M in signed contracts across commercial and US government customers – we're mass-producing the highest-power satellite platforms ever built for missions from LEO to deep space. In your first 6 months, you will define mechanical requirements, create initial concepts and trades, perform preliminary and detailed analysis, define development test campaigns, trade and select any purchased electromechanical subsystems, and produce development hardware.
NewMechanical Engineer ActalentMechanical EngineerLos Angeles, CA$36–$41 / hourMechanical Design Engineer – URGENT HIRE The Mechanical Design Engineer will play a key role in designing precision sheet metal products using SolidWorks and AutoCAD , producing detailed shop drawings and bills of material for in‑house machining and fabrication. We are proud to be an Engineering News-Record (ENR) Top 500 Design Firm for our engineering design services and a ClearlyRated Best of Staffing® winner for both client and talent service.
NewMechanical Engineer FurientisMechanical EngineerLos Angeles, CACoordinate with aero on outer mold line implementation, with propulsion on case and nozzle integration, with avionics on tray and harness routing, with the seeker team on optical-package interfaces, and with the Control Actuation System Engineer on fin actuator integration into the airframe: hinge supports, OML cutouts, and sealing. Job Description America is critically deficient in production of defensive munitions- we currently produce shipborne interceptors in the few hundreds per year while our adversaries are producing offensive threats in the tens of thousands per year.
NewSenior Mechanical Design Engineer ATC AutomationSenior Mechanical Design EngineerSimi Valley, CARemote$120,000–$140,000 / yearIn this role, you will collaborate directly with customers to define project requirements and work alongside a multidisciplinary engineering team to deliver reliable, high-performance automation solutions. Job Description ATC Automation is seeking a hands-on and innovative Senior Mechanical Design Engineer to lead the mechanical development of custom automation machinery and tooling systems at our Simi Valley, CA location.
NewLead Mechanical Engineer, Structures AstrolabLead Mechanical Engineer, StructuresHawthorne, CAWe are singularly focused on designing, building, and operating a fleet of multi-purpose commercial planetary rovers to extend and enhance humanity’s presence in the solar system. Experience mentoring and developing more junior engineers, contractors, and interns to build an effective design team.
NewSenior Mechanical Engineer (Terran-R Structures) Relativity SpaceSenior Mechanical Engineer (Terran-R Structures)Long Beach, CA$132,000–$198,000 / yearAny unsolicited submission - via email, our website, social media, or directly to an employee - will be deemed the property of Relativity Space, and no fee will be owed absent a current, fully executed agreement with Talent Acquisition that specifically authorizes submissions for the applicable role. Whether you're working on highly iterative mechanisms that move or tight-margin structures that shouldn't, you'll get hands-on hardware ownership and see the rocket coming to life on the factory floor.
NewMechanical Engineer HermeusMechanical EngineerLos Angeles, CAFinal compensation will be determined based on a variety of factors, including role scope and responsibilities, relevant experience, education and training, key skills, market data, and business needs. Job Description Hermeus is a venture-backed defense aviation company reclaiming the lost art of rapid iterative prototyping to build the fastest aircraft in the world today.
NewMechanical Design Engineer - Advanced Spacecraft Propulsion Approach VentureMechanical Design Engineer - Advanced Spacecraft PropulsionHawthorne, CA$130,000–$180,000 / yearYou will design precision mechanical components, perform structural and thermal analysis, build and test hardware, and work closely with multidisciplinary engineering teams to deliver reliable propulsion systems capable of operating in demanding space environments. Our team combines experience from leading aerospace organizations with the agility of a venture-backed startup, creating an environment where engineers have significant ownership, move quickly, and directly influence product development from concept through flight.
NewMechanical Design Engineer - Advanced Electrochemical Systems Approach VentureMechanical Design Engineer - Advanced Electrochemical SystemsLos Angeles, CA$130,000–$180,000 / yearOur multidisciplinary engineering team is developing integrated propulsion, power, and fluid systems that enable more capable spacecraft while solving complex engineering challenges through rapid design, testing, and iteration. Join a seed-stage space technology startup developing advanced spacecraft propulsion and energy systems that enable the next generation of in-space mobility.
NewMECHANICAL DESIGN ENGINEER Hydra ElectricMECHANICAL DESIGN ENGINEERBurbank, CA$73,000–$88,000 / yearTo conform to U.S. Government space technology export regulations, applicant must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State. The candidate will be expected to prepare documentation and presentations while interfacing with customers, engineers, drafters, supply chain, quality, management, and production personnel.
NewMechanical Design and Manufacturing Engineer Canopy A&DMechanical Design and Manufacturing EngineerIrvine, CA$80,000–$140,000 / yearUtilize traditional and advanced manufacturing techniques for metallics, composites, and other materials used in thermal protection systems and critical aerospace structures, ensuring performance, durability, and production scalability. Key Responsibilities Lead the design, development and manufacturing of mechanical components and assemblies for Hera’s industry-leading thermal protection systems (TPS), including soft goods, composites, and engineered surface finishes.