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.
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.
NewStaff Mechanical Engineer, Fluid Systems Radiant IndustriesStaff Mechanical Engineer, Fluid SystemsEl Segundo, CA$200,500–$314,475 / 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 Design Engineer Auto-Chlor System, LLCMechanical Design EngineerRiverside, CA$100,000–$120,000 / yearKnowledge of mechanical design, sheet metal fabrication, plastic component design, electrical/electronic circuit design, commercial water heaters and heat pumps. Supports field sales team with regulatory issues including working with local inspectors to keep customers equipment in operation without disruption to the business.
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, 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 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.
NewMechanical Engineer (MEP) EPC STAFF Acquisition and Development, LLCMechanical Engineer (MEP)Irvine, CADirect expansion (DX) equipment, VRV/VRF air conditioning systems design and central chilled water and heating water plants. Knowledgeable of construction administration responsibilities including submittal review, RFI responses, performing site visits and writing field reports.
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.
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.
NewSr. Mechanical Engineer - Turbomachinery Arbor EnergySr. Mechanical Engineer - TurbomachineryEl Segundo, CA$150,000–$175,000 / yearArbor's team of world-class engineers and scientists are developing a scalable, low-cost approach to Bioenergy with Carbon Capture and Storage (BECCS) based on modern rocket engine technology. BECCS is a carbon dioxide removal (CDR) approach that uses biomass to produce energy and remove CO₂ from the atmosphere and store it permanently underground, while ensuring food security, rural livelihoods, and biodiversity are not affected.
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.
NewSenior Mechanical Engineer ThinKom SolutionsSenior Mechanical EngineerHawthorne, CA$100,000–$140,000 / yearBridge Design & Manufacturing: Collaborate closely with internal production teams and external suppliers to optimize for manufacturability (DFM/DFA), maintainability, and cost. We’re looking for a Senior Mechanical Engineer who loves hands-on engineering, thrives on solving hard hardware problems, and wants to see their designs go from napkin sketch to physical deployment.
NewSenior Mechanical Engineer Turion SpaceSenior Mechanical EngineerIrvine, CATo conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. Industry Experience: Extensive experience working in aerospace or space technology sectors, including understanding of the unique requirements and challenges associated with mechanical systems for space missions.
NewMechanical/Mechatronics Engineer Kelly ServicesMechanical/Mechatronics EngineerIrvine, CAKellyOCG is the distinguished outsourcing and consulting segment of Kelly Services, known for applying a forward-looking approach that enables companies to make strategic workforce planning decisions that impact their business and competitive advantage. The role works on cross-functional project teams to deliver safe, reliable, and manufacturable catheter shafts, steerable mechanisms, electromechanical subsystems, and miniaturized ultrasound transducer assemblies used in EP or Structural Heart procedures.
NewMechanical Systems Engineer, Exterior Sensor Integration ALTEN Technology USAMechanical Systems Engineer, Exterior Sensor IntegrationLong Beach, CA$130,000–$145,000 / yearOwn the exterior sensor cleaning architecture, including nozzle design and aiming, washer fluid routing, pump and valve selection, air assisted and telescopic nozzle concepts, heated nozzle and heated lens strategies, and fluid volume and reservoir sizing. Job Description We're ALTEN Technology USA, an engineering company helping clients bring groundbreaking ideas to life—from advancing space exploration and life-saving medical devices to building autonomous electric vehicles.
NewMechanical Design Engineer Hadrian AutomationMechanical Design EngineerTorrance, CA$165,000–$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.
NewStaff Mechanical Engineer (Mechanisms) Relativity SpaceStaff Mechanical Engineer (Mechanisms)Long Beach, CA$164,000–$246,000 / 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. To support our mission of changing the way rockets are built and flown, you will guide the design of Terran R mechanisms such as stage separation, payload deployment, aero control features and landing gear.