NewSenior Mechanical Engineer (Electric Propulsion) Impulse SpaceSenior Mechanical Engineer (Electric Propulsion)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. 7+ years of demonstrated experience designing and analyzing electric propulsion or other plasma-facing hardware design (fusion systems, experimental research devices, semiconductor manufacturing, thin-film deposition, etc).
NewMechanical Engineer Layup PartsMechanical EngineerHuntington Beach, CAITAR Requirements To 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. We design, machine, print, and build faster than anyone else in the industry and we’re looking for experienced Mechanical Engineers who thrive in high-performance environments and want to be part of the team that’s redefining what’s possible in advanced manufacturing.
NewSpecialist, Software Engineering (Controls Engineer) L3Harris TechnologiesSpecialist, Software Engineering (Controls Engineer)Anaheim, CA$105,500–$180,000 / yearUnder general direction of the Management of Software Engineering, this position develops and applies advanced software engineering methods in the investigation and solution of complex and advanced technical problems power system architectures and power conversion equipment. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.
NewMechanical Engineer - Healthcare Harley Ellis DevereauxMechanical Engineer - HealthcareEl Segundo, CAThis role manages major portions of mechanical and plumbing scopes, guides QAQC efforts, mentors team members, and represents the discipline in client-facing settings. The Mechanical Engineer is a technical expert and high-level engineer who experienced in healthcare, responsible for technical execution, design leadership, and interdisciplinary coordination of complex mechanical systems.
NewMechanical Engineer ThinKom SolutionsMechanical EngineerHawthorne, CA$70,000–$100,000 / yearKnowledge in the areas of materials, structural and thermal analysis, dynamics, vibration and mechanical shock, heat transfer, and finite element analysis. Solid model design, geometric dimensioning and tolerancing, and detailed drawing experience, preferably using Creo or similar CAD software.
NewAvionics Mechanical Engineer (All levels) Impulse SpaceAvionics Mechanical Engineer (All levels)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. Lead and contribute to CoDRs, PDRs, and CDRs, clearly communicating design rationale, tradeoffs, and risks to cross-functional stakeholders.
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.
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 Pan-Pacific MechanicalMechanical EngineerFountain Valley, CAYou’ll collaborate with fellow engineers, preconstruction executives, project managers, and field teams to deliver safe, energy-efficient, and constructible mechanical systems across diverse commercial sectors including healthcare, high-rise, entertainment, transportation, biotech, laboratories, and more. If you’re passionate about HVAC design, thrive in a collaborative design-build environment, and want exposure to everything from commercial packaged systems to complex central plants and laboratory exhaust systems — we want to connect.
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.
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.
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 - 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.
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.
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.
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.
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.