Mechanical Engineer, Fluid Systems
Radiant
About the Role Radiant is seeking a highly motivated Mechanical Engineer, Fluids Systems to help own critical Kaleidos fluid systems from preliminary design through build and production. These systems include the primary loop subsystems and power conversion loop, serving to convert heat from the reactor core into electrical power. You will be responsible for the following: trade studies, component selection, thermal hydraulic analysis, piping design, vendor selection, assembly, and testing. You will have an instrumental impact of fueling the first new commercial reactor design in over 50 years by 2026. Responsibilities & Duties: Help own end-to-end engineering of fluid systems and components, including compressors, valves, and heat exchangers. Perform thermal and fluids analysis to drive design decisions, verify system performance, and ensure structural integrity using first-principle hand calculations and finite element tools. Perform trade studies to optimize system and meet program requirements. Develop and execute manufacturing/assembly instructions and test plans. Create and manage a Bill-Of-Materials (BOM). Find and develop suppliers for all components. Own subassembly design, manufacturing, and test schedules. Own risk analysis (FMEA) for subsystems. Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication. Required Qualifications & Skills: Bachelor's degree from an accredited institution in Mechanical, Materials, Aeronautical, Civil or Structural Engineering. Experience with fluid system architecture design. Experience in designing, building, and testing fluids systems. Proficient knowledge in fluid dynamics and thermodynamics. Proficient knowledge of heat exchanger design and analysis methods. Desired Qualifications & Skills: Knowledge of thermodynamic power cycles. Prior experience with fluid system modeling via Matlab/Python. Experienced in design for manufacturability and ramping up hardware build in a production environment. Experienced in designing and operating test stands. Takes extreme ownership of work and a high degree of responsibility. Excellent communication across multidisciplinary teams. Prior nuclear experience in not required for this role. #J-18808-Ljbffr Radiant
$100k - $135k
A leading aerospace company is seeking a Mechanical Engineer to join its construction team in Hawthorne, CA. In this role, you will be responsible for designing and analyzing advanced HVAC and fluid systems critical to manufacturing processes. Candidates should have a Bachelor...Suggested- ...beyond our planet. About the RoleApex is looking for a Mechanical Engineer - Ground Systems (MGSE) to join our team and help design, build, and support... ...environmentsFamiliarity with lifting/rigging hardware, fluid systems, or pneumatic systemsExperience performing...SuggestedFull timeWork at office
$175 per hour
Steric Systems is seeking a Mechanical Engineer based in Culver City, CA to design and refine our food-grade spirits processing system. You'll lead engineering... ...efforts including upgrading the frame structure and fluid flow design while ensuring compliance with food safety...SuggestedHourly payFlexible hours$120k - $200k
MECHANICAL ENGINEER (COMPLEX PRECISION SYSTEMS) Freeform builds AI-native manufacturing systems that unify software, hardware, and physics to produce industrial... ...control and kinematics. Experience with design of fluid or thermal systems. Location: Based in Hawthorne,...SuggestedFull timeCasual workInternshipRelocation packageLong distanceFlexible hours$175 per hour
Job Title : Mechanical Engineer for Food-Grade Liquid Processing System Location : Culver City, CA Employment Type : Contract / Part-Time Position Summary Mechanical... ...welded stainless steel frame and case; refine fluid flow system comprising Tri-Clamp fittings, valves,...SuggestedHourly payContract workPart timeRemote workMonday to Friday$130k - $180k
...Job Description Job Description Mechanical Design Engineer - Develop Advanced Electrochemical Systems for Space Los Angeles, CA | On-site Opportunity Summary... ...hardware. You will apply mechanical design, fluid systems, thermal analysis, and electrochemical fundamentals...- .... About the RoleApex is seeking a Propulsion Mechanical Engineer to own mechanical designs for our spacecraft propulsion systems. You will drive the design, analysis, and qualification... .... This role spans mechanical design, fluid system development, thermal interfaces, and...Full timeWork at office
$130k - $180k
...actively developing the technologies to make this possible, with the ultimate goal of enabling human life on Mars.SR. MECHANICAL ENGINEER, FLIGHT TERMINATION SYSTEM (STARSHIP)As a member of the Flight Termination System team, you will have the exciting opportunity to be...Permanent employmentTemporary workWork experience placement$180k - $230k
...Job Description Job Description Senior Fluid Systems Engineer - Architect Advanced Thermal & Power Conversion Systems Hawthorne, CA |... ...efforts Qualifications Bachelor's degree or higher in Mechanical Engineering, Aerospace Engineering, Chemical Engineering,...$100k - $175k
General Matter in Los Angeles is seeking a Fluid Systems Engineer to lead the design and deployment of fluid systems for uranium enrichment.... ...of experience in fluid systems design and a Bachelor’s in Mechanical Engineering or related field. This role offers a salary range...- Blue Origin in Los Angeles is looking for a Fluid Analysis Engineer to perform thermal and fluid analysis for their lunar vehicle pump components. The ideal candidate will have a master's degree in Mechanical or Aerospace Engineering and over five years of relevant experience...
$125k - $150k
Company DescriptionSenior Project Engineer, HVAC Control SystemsValhalla, USA-NY or Los Angeles... ....Joining RambollAs our new Control Systems Engineer, you will be a part of Ramboll’... ...with other disciplines as neededMentor mechanical engineers and assist with training on controls...Flexible hours- SpaceX in Hawthorne, CA is seeking a Senior Mechanical Engineer (HVAC) to own fluid and HVAC systems across the campus, design, analyze, test, and manufacture fluid system elements for spaceflight manufacturing facilities. You will perform CAD modeling, fluid analyses,...
- Latent AI is seeking a Sr. Mechanical Engineer (HVAC) to join our Hawthorne, CA team. In this role, you will design and manage advanced HVAC and fluid systems, working closely with various interdisciplinary teams. If you have a passion for innovation in the aerospace sector...
$135k - $190k
SPACE EXPLORATION TECHNOLOGIES CORP is seeking a Sr. Mechanical Engineer (HVAC) in Hawthorne, CA. In this role, you will design and activate advanced manufacturing facilities, focusing on fluid systems such as HVAC, compressed air, and piping. You will collaborate with...$130k - $180k
United States Digital Space LLC is seeking a Mechanical Engineer for its Flight Termination System team in Hawthorne, California. This role involves the design of explosive devices and hardware for the Starship missions, with a focus on safety and rigorous testing processes...$91.8k - $140.25k
A high-speed aircraft manufacturer in Los Angeles is seeking a Mechanical Engineer to support structural design for high-Mach and hypersonic aircraft. Responsibilities include performing structural and thermal analyses, leading trade studies, and collaborating with various...- SpaceX is seeking a Sr. Mechanical Engineer for the Flight Termination System on Starship, responsible for design, analysis, and fabrication of high-explosive hardware. You will own development from concept to delivery, coordinate with regulatory partners, and ensure compliance...
- Freeform is seeking a Mechanical Engineer (New Grad December 2026) based in Hawthorne, CA, to own projects from concept through deployment.... ...will design, fabricate, test, and implement complex mechanical systems for additive manufacturing and factory-scale integration,...
- A leading aerospace manufacturer in Hawthorne, CA, is seeking a New Graduate Engineer, Mechanical to drive the design and production of cutting-edge technologies. You will own hardware from concept to operation, ensuring compliance through rigorous testing. The ideal candidate...
$100k - $115k
General Matter in Los Angeles is looking for a Mechanical Engineer to design, build, and test innovative mechanical structures for enrichment technology. This role requires collaboration with engineers across various disciplines and engagement in fast-paced projects. Ideal...$80k
Generalmatter in Los Angeles, CA, is seeking a Mechanical Engineer who will design, build, and own mechanisms for enrichment technology. This role requires working closely with teams from various engineering disciplines, ensuring seamless integration of mechanical designs...$130k - $180k
SpaceX is seeking a Sr. Mechanical Engineer for its Starship avionics team. You will design advanced instrumentation for high reliability in extreme environments and lead efforts in mechanical design and analysis. Ideal candidates should possess a Bachelor's in relevant...- val's services is seeking a Mechanical Engineer specialized in thermal management to design, analyze, develop, test, and troubleshoot refrigeration systems for military applications. The role requires coordinating with multidisciplinary teams and acting as a cognizant engineer...
- ...hardware iteration, we deliver high-speed systems at the pace of the modern battlefield... ...: We are seeking an Integration Engineer to own the design release, build, test, and delivery of key vehicle fluid, propulsion, and mechanism assemblies — including control...Weekly payPermanent employmentWork at officeFlexible hours
- Second Order Effects is seeking a Mechanical Engineer to design and implement high-performance electro-mechanical systems across aerospace, renewable energy, medical devices, and more. You will collaborate with a team of engineers to deliver robust, scalable solutions for...
- SpaceX is seeking a Dragon Mechanical Engineer to design and develop critical spacecraft systems for crew and cargo missions, driving from early design through production and recovery. You will perform hand calculations, FEA, and CAD analyses, and lead design reviews with...
$120k - $140k
A leading defense contractor in Inglewood, CA, is seeking an experienced mechanical engineer. You will support the development, documentation, and design of mechanical systems, particularly in the aerospace sector. The ideal candidate has a background in aerospace manufacturing...For contractors- A leading spacecraft engineering firm in Hawthorne, CA is seeking a Generative Spacecraft Engineer - Mechanical to design and integrate flight systems. The ideal candidate has a Bachelor's degree in Mechanical Engineering and 5+ years of relevant experience. This role involves...
- United States Digital Space LLC is seeking a Mechanical Engineer (Dragon) to advance the structural design of spacecraft and critical components... ..., strong communication, and ownership of flight-critical systems with extended hours and travel to remote sites. #J-18808-...Remote work
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