Mechanical Engineer II, Thermal Control Systems VastMechanical Engineer II, Thermal Control SystemsLong Beach, California$112,340–$159,468 / yearVast is developing next-generation space stations to ensure a continuous human presence in space for America and its allies, enabling advanced microgravity research and manufacturing, and unlocking a new space economy for government, corporate, and private customers. We also take pride in offering exceptional food perks, with snacks, drip coffee & onsite barista, cold drinks, and dinner meals remaining free of charge, and lunch subsidized as part of Vast’s ongoing commitment to providing high-quality meals for employees.
Mechanical Engineer Fall 2026 Co-Op Castelion CorporationMechanical Engineer Fall 2026 Co-OpTorrance, CaliforniaCastelion is bringing a new approach to defense development and production: one that focuses on short, iterative design cycles, rapid testing in development, and modern commercial manufacturing strategies for production at scale. To conform to U.S. Government export regulations, the applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (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.
NewPowertrain Responsible Engineer HermeusPowertrain Responsible EngineerLos Angeles, CA$91,800–$112,200 / yearEngineer I $91,800 - $112,200 Engineer II $114,750 - $140,250 Engineer III $138,550 - $187,450 The salary range listed for this role is intended as a general guideline. About The Role: As a Powertrain Responsible Engineer you will own the mechanical components and assemblies that generate and transmit power in all forms (fluid, mechanical and electrical) throughout our hypersonic vehicles.
Senior Mechanical Engineer (Structures) Radiant IndustriesSenior Mechanical Engineer (Structures)El Segundo, CaliforniaPerform 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. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
Mechanical Engineer (Starship Components Manufacturing) SpaceXMechanical Engineer (Starship Components Manufacturing)Hawthorne, CA$100,000–$130,000 / yearYou will introduce innovative products to the factory, evolve shop layout and capabilities, implement flight-like testing, solve nuanced root cause investigations, and exercise the algorithm to achieve SpaceX’s highest-yet component build rate. The Starship Components Manufacturing team assembles, tests, troubleshoots, and delivers flow control devices and mechanisms that drive critical capabilities on Starship/Super Heavy - from regulators and butterfly valves to flap/fin actuators.
Mechanical Engineer (Starship Components Manufacturing) Space Exploration TechnologiesMechanical Engineer (Starship Components Manufacturing)Hawthorne, CA$95,000–$115,000 / yearYou will introduce innovative products to the factory, evolve shop layout and capabilities, implement flight-like testing, solve nuanced root cause investigations, and exercise the algorithm to achieve SpaceX's highest-yet component build rate. The Starship Components Manufacturing team assembles, tests, troubleshoots, and delivers flow control devices and mechanisms that drive critical capabilities on Starship/Super Heavy - from regulators and butterfly valves to flap/fin actuators.
NewManufacturing Welder SLBManufacturing WelderWhittier, CASetup and operate precision calibrated tools including but limited to, TIG welding machine, brazing setup, gas tanks, lines, regulators, digital and mechanical gauges, instruments etc. As a trusted partner to companies across the world, Smurfit Westrock is dedicated to creating efficient and scalable paper and packaging solutions to help solve complex packaging challenges.
Senior Mechanical Engineer, Additive Manufacturing ElastiumSenior Mechanical Engineer, Additive ManufacturingLos Angeles, CAAt Elastium, you won’t be another engineer optimizing inside an existing box—you’ll build in the wild, architecting a new industrial era where factories run like software, starting with footwear. We're building the most frictionless way of turning bits into useful atoms, sending ripples of singularity across the industry, and bringing tens of billions of GDP back to America.
Staff Mechanical Engineer - Seat Complete RivianStaff Mechanical Engineer - Seat CompleteIrvine, California$137,800–$172,300 / yearFull timeRivian may use your Candidate Personal Data for the purposes of (i) tracking interactions with our recruiting system; (ii) carrying out, analyzing and improving our application and recruitment process, including assessing you and your application and conducting employment, background and reference checks; (iii) establishing an employment relationship or entering into an employment contract with you; (iv) complying with our legal, regulatory and corporate governance obligations; (v) recordkeeping; (vi) ensuring network and information security and preventing fraud; and (vii) as otherwise required or permitted by applicable law. Rivian may share your Candidate Personal Data with (i) internal personnel who have a need to know such information in order to perform their duties, including individuals on our People Team, Finance, Legal, and the team(s) with the position(s) for which you are applying; (ii) Rivian affiliates; and (iii) Rivian’s service providers, including providers of background checks, staffing services, and cloud services.
NewSenior Responsible Engineer, Valves Relativity SpaceSenior Responsible Engineer, ValvesLong 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 designs and delivers the propellant, pressurant, pneumatics, and other fluid systems that turn structures into functioning rockets.
Senior Mechanical Engineer, Mechanisms Radiant NuclearSenior Mechanical Engineer, MechanismsEl 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. 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.
Mechanical Engineer, Fluid Systems - 2026 New Graduate Radiant NuclearMechanical Engineer, Fluid Systems - 2026 New GraduateEl 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.
Mechanical Engineer, Fluid Systems Radiant NuclearMechanical 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.
Senior Mechanical Engineer - Electric Vehicle Systems Motive Workforce SolutionsSenior Mechanical Engineer - Electric Vehicle SystemsCosta Mesa, CAWe are supporting an emerging electric vehicle company developing next-generation EV platforms and prototype vehicles focused on performance, lightweight architecture, and modern electric mobility systems. The team is seeking a Senior Mechanical Engineer with hands-on experience in EV development, mechanical integration, and prototype vehicle programs.
Senior Mechanical Engineer - Structures Radiant NuclearSenior Mechanical Engineer - StructuresEl Segundo, CAPerform 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.
Mechanical Engineer Thunderhawk Technology Partners LLCMechanical EngineerIrvine, CASeeking a Mechanical Engineer with 2–5 years of experience in turbo machinery (compressors, turbines, ECS subsystems). • Work with cross-functional teams on product development.
Mechanical Engineer – Manufacturing Peregrine TeamMechanical Engineer – ManufacturingLos Angeles, CAWe are seeking a Mechanical Engineer to support product development and manufacturing processes in a high-tech production environment. Design and develop mechanical components and systems for manufacturing applications.
NewThermal Engineer Impulse SpaceThermal EngineerRedondo Beach, CAJob Description Description As a Thermal Engineer at Impulse, you will be responsible for thermal management of spacecraft from concept, analysis, and design, to implementation, testing, and flight while working closely with a fast-paced, agile team that strives to make a high-performance spacecraft from a clean sheet design. To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you 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.
NewSolar Array Test Engineer Impulse SpaceSolar Array Test EngineerRedondo 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. You’ll work closely with solar array design, power electronics, systems engineering, and manufacturing teams to ensure robust, compliant, and high-performing solar hardware.
Mechanical Design Engineer (Starfall) SpaceXMechanical Design Engineer (Starfall)Hawthorne, CA$100,000–$115,000 / yearTo 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. Demonstrated ability to own hardware or systems within an integrated engineering team outside a classroom setting (FSAE, Engineers without Borders, Design-Build-Fly, NASA student launch, personal entrepreneurial ventures, etc.).