NewSenior Launch Mechanical Engineer Relativity SpaceSenior Launch Mechanical EngineerLong Beach, CA$124,000–$170,500 / 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. Present and communicate designs effectively to cross-functional teams and leadership, focusing on methodology, functionality, and constructability.
Specialist, Project Engineering L3Harris TechnologiesSpecialist, Project EngineeringCanoga Park, CA$92,500–$171,500 / yearThe Project and Component Engineer will assist in executing multiple phases of Pressurant and Propellant components (i.e. tanks, pressure switch, filters, regulators, transducers and valves) within assigned defense programs, as well as supporting advanced propulsion systems. Coordinate with subject matter experts and multiple engineering disciplines to author and refine specifications, trade studies, design concepts, systems integration and component-level test plans.
NewSenior Mechanical Engineer - Turbomachinery Rotordynamics Radiant IndustriesSenior Mechanical Engineer - Turbomachinery RotordynamicsEl Segundo, CA$158,000–$219,450 / yearRadiant is seeking a highly motivated Senior Mechanical Engineer, Turbomachinery (Rotordynamics) to join the team responsible for the power generation and primary cooling turbomachinery of our Kaleidos product. 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, Electrical Systems Radiant IndustriesMechanical Engineer, Electrical SystemsEl Segundo, CA$74,000–$130,000 / 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.
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 -- Component Design, Test & Integration BlueCore EnergyMechanical Engineer -- Component Design, Test & IntegrationLong Beach, CAPhysical & Machinery Requirements: Because we are a hands-on startup, this role may require the ability to perform physical labor, navigate active construction/manufacturing zones, and/or operate heavy machinery and specialized manufacturing equipment as needed. This is a hands-on, collaborative role with room to grow — a great fit for someone eager to learn, comfortable asking questions, and happy to get their hands dirty in the lab and on the deck plate.
NewMechanical Engineer II (Engineer II) - FPC (Fans, Pumps and Compressors) 804 TechnologyMechanical Engineer II (Engineer II) - FPC (Fans, Pumps and Compressors)Irvine, CA$45–$55 / hourThe Mechanical Engineer will carry out engineering assignments concerned with the planning, design and testing of rotating machinery (fans, pump and compressor) with rotating speeds up to 24,000 rpm. Qualified candidate will have a minimum of 3-5 years minimum experience in the design, analysis and development of machine design and electro-mechanical components used in defense or aerospace applications.
NewSenior Mechanical Engineer, Fluid Systems Radiant IndustriesSenior Mechanical Engineer, Fluid SystemsEl Segundo, CA$158,000–$219,450 / 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 EPC STAFF Acquisition and Development, LLCMechanical EngineerIrvine, CA$90,000–$150,000 / yearold) MEP+ firm who work on large and small projects in industrial manufacturing, science & tech/ healthcare, clean rooms, and commercial/ retail. • HVAC design (airside, hydronic, steam) for a wide variety of multi-disciplinary project types.
NewOpto-Mechanical Engineer (Analysis) Impulse SpaceOpto-Mechanical Engineer (Analysis)Redondo Beach, CAThis position requires applicants to be either U.S. Persons (i.e., U.S. citizen, U.S. national, lawful permanent U.S. resident (green card holder), an individual granted asylum in the U.S., or an individual admitted in U.S. refugee status) or persons eligible to obtain an export license from the U.S. Departments of State, Commerce, or other applicable U.S. government agencies. Support Structural-Thermal-Optical Performance analysis by working with optical engineers to understand alignment sensitivity, detector placement tolerances, boresight stability, wavefront error, and pointing requirements.
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 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.
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.
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.).
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.
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.
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.
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 Engineer FurientisSenior Mechanical 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.
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.