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385 mechanical systems engineer jobs at 160 companies in Compton, CA

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Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
Help us #BeatIndeed & #BeatLinkedIn
2w
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Electro-Mechanical Systems Engineer
Monrovia, California, United States
$70k-$110k/yr OnsiteFull Time
ChromoLogic
ChromoLogic: Develops and commercializes disruptive medical, aerospace, and security technologies.
Bachelor's or Master's in engineering, hands-on experience integrating mechanical/electrical/material systems, SolidWorks and FEA proficiency, ability to build and test hardware prototypes, strong problem-solving and documentation skills.
SolidWorks, FEA, CAD
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18h
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Senior Mechanical Systems Engineer I/II
Long Beach, California, United States
$125k-$175k/yr OnsiteFull Time
Rocket Lab
Rocket LabNasdaq: RKLB: Operates launch vehicles and manufactures satellites for space missions.
5+ YOEBachelor's in mechanical/aerospace engineering, 5+ years (I) or 8+ years (II) aerospace mechanical experience, satellite/spacecraft experience, CAD and FEA proficiency, mass and mechanical budgets, US citizenship or equivalent ITAR-eligible status required.
CAD, FEA, JAMA, DOORS
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1mo
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Mechanical Engineer, Fluid Systems
El Segundo, California, United States
$108k-$150k/yr OnsiteFull Time
Radiant
Radiant: Designs and manufactures portable, mass-produced nuclear microreactors.
2+ YOEBachelor’s in Mechanical/Materials/Aeronautical/Civil/Structural engineering; 2+ years in designing, building, and testing fluid systems; strong fluid dynamics and heat exchanger knowledge; 100% onsite at El Segundo, CA.
MATLAB, Python, Finite Element Analysis (FEA)
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1mo
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Principal Mechanical Engineer - Launcher Systems
Los Angeles, California, United States
$180k-$230k/yr OnsiteFull Time
Hikinex
Hikinex: Provider of outsourced sales and administrative business solutions.
10+ YOE10+ years in aerospace/defense mechanical design and system integration; BS in Mechanical Engineering; launcher systems experience; US citizenship and ability to obtain security clearance.
SolidWorks, CAD
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2mo
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Mechanical Engineer, Marine Systems
El Segundo, California, United States
$130k-$210k/yr OnsiteFull Time
Oceanus Maritime Technologies: Building the operating platform for the modern maritime world.
4+ YOEBachelor's degree or higher; 4+ years in mechanical/electrical system design, integration, and testing in real environments; CAD, wiring, and marine exposure; travel up to ~25%.
3D CAD, SolidWorks, NX, Creo, GD&T
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1mo
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Mechanical Engineer, Thermal Control Systems II
Long Beach, California, United States
$112k-$159k/yr OnsiteFull Time
Vast
Vast: Develops and operates commercial artificial-gravity space stations.
5+ YOEBachelor's in mechanical engineering; 5+ years hardware experience with fluid systems; design, fabrication, testing experience.
NX, GD&T, ANSYS, FEMAP
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2mo
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Senior Systems Engineer, Mechanical Design
Hawthorne, California, United States
$140k-$200k/yr OnsiteFull Time
Critical Energy
Critical Energy: Builds modular power plants that convert heat into electricity.
5+ YOESenior Systems Engineer with 5+ years in systems engineering; mechanical design, fluid dynamics; CAD (Siemens NX); strong analytical skills; collaborative teamwork.
Siemens NX, ANSYS, CATIA
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3mo
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Mechanical Engineer
Tustin, California, United States
$100k-$150k/yr HybridFull Time
Salas O'Brien
Salas O'Brien: Provides integrated engineering design and technical consulting services.
5+ YOEBachelor's in Mechanical Engineering; 5-10 years in mechanical systems engineering; PE preferred; on-site in Tustin, CA with up to 30% travel.
Revit, Navisworks, EnergySoft, Trace software
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Senior Mechanical Engineer, Intelligence Systems
Santa Ana, California, United States
$146k-$194k/yr OnsiteFull Time
Anduril Industries
Anduril Industries: Defense technology building autonomous military hardware and software.
10+ YOEActive U.S. Secret clearance,10+ years mechanical engineering experience,BS/M.Eng/MS/PhD,CAD and engineering drawings,hands-on fabrication,prototyping,thermal and structural analysis,ability to support manufacturing and test sites.
SiemensNX, Teamcenter
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3mo
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Mechanical Engineer
Pasadena, California, United States
$53-$65/hr OnsiteFull Time
GEI Consultants
GEI Consultants: Provides multi-disciplinary engineering and environmental consulting services.
5+ YOEMinimum 5 years in mechanical engineering; BS in Mechanical Engineering preferred; pumping and water systems experience; CAD/Revit; GIS/GPS; design and analysis; team collaboration.
CAD, Revit, GIS, GPS
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2mo
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Mechanical Engineer
Hawthorne, California, United States
$123k-$150k/yr OnsiteFull Time
Venturi Astrolab
Venturi Astrolab: Designs and builds robotic rovers for Moon and Mars exploration.
2+ YOEBachelor's degree in engineering; 2+ years mechanical systems experience; CAD and FEA; design for manufacturing and GD&T.
CAD software, Finite Element Analysis (FEA) software
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1mo
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Mechanical Engineer
Irvine or Los Angeles
$93k-$132k/yr OnsiteFull Time
HDR
HDR: Global firm providing architecture, engineering, and environmental services.
6+ YOEBachelor's degree in Mechanical Engineering; minimum 6 years in mechanical and plumbing design for commercial or institutional buildings; PE license; experience with building systems; proficiency with MS Office and design software.
MS Office, Trane TRACE, Manufacturer selection software
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1w
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Mechanical Engineer
Torrance, California, United States
$110k-$140k/yr OnsiteFull Time
Intellisense Systems
Intellisense Systems: Designs and manufactures advanced sensing and display solutions.
5+ YOEB.S. in Mechanical Engineering, 5+ years R&D/product design experience with electro-mechanical or optical systems, advanced solid modeling (SolidWorks/Pro-E/CATIA), GD&T, manufacturing processes, and mechanical/thermal simulation (ANSYS) preferred.
SolidWorks, Pro-E, CATIA, ANSYS
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1mo
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Mechanical Engineer
Irvine or Los Angeles
OnsiteFull Time
HDR
HDR: Global provider of engineering, architecture, environmental and construction services.
6+ YOEBachelor's in Mechanical Engineering, PE license required for the job location, experience in mechanical/plumbing system design for commercial or institutional buildings, proficiency with Microsoft Office and Trane TRACE; master's preferred and 6+ years experience desired.
Microsoft Office, Trane TRACE
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21h
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Mechanical Engineer, Components
El Segundo, California, United States
$115k-$150k/yr OnsiteFull Time
Forge Atomics
Forge Atomics: A developer of advanced reactor technology working to scale nuclear fission for reliable, low‑carbon energy.
1+ YOEBachelor's in mechanical engineering or related,1+ years designing and building mechanical hardware,experience with fluid/gas/thermal systems and test instrumentation.
pressure transducers, thermocouples, resistance temperature detectors, relays, solenoid valves
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1w
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Mechanical Engineer I
Irvine, California, United States
$76k-$102k/yr OnsiteFull Time
Iris Technology
Iris Technology: Designs and manufactures electronics for aerospace and defense missions.
1+ YOEUS work authorization required; Bachelor's in mechanical engineering; 1+ year engineering experience in R&D or manufacturing; SolidWorks and systems integration experience; able to read electrical/mechanical drawings.
SolidWorks, Microsoft Project, Microsoft Access, Microsoft Excel, Microsoft PowerPoint
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2mo
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Mechanical Engineer
Los Angeles, California, United States
OnsiteFull Time
Furientis
Furientis: Develops cost-effective, high-volume interceptor missile systems.
6+ YOEB.S. in mechanical/aerospace engineering, 6+ years designing flight structures or mission-critical systems; NX and Teamcenter experience, GD&T proficiency, hands-on builder, and U.S. Person eligible for SECRET clearance.
NX, Teamcenter
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1w
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Principal Mechanical Engineer
Hawthorne, California, United States
$140k-$180k/yr OnsiteFull Time
ThinKom
ThinKom: ThinKom manufactures high-performance phased-array antennas for satellite communications.
10+ YOEBS in Mechanical or Aerospace Engineering, 10+ years mechanical/product design experience, positioner/drive system expertise, producibility and FEA knowledge, hands-on design and mentoring, eligible for US DoD security clearance.
Creo, Microsoft Office
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1mo
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Senior Mechanical Engineer - Buildings
Los Angeles, California, United States
$108k-$157k/yr OnsiteFull Time
WSP
WSPToronto Stock Exchange: WSP: Provides engineering, design, and environmental consultancy services globally.
5+ YOEBachelor's in Mechanical or Architectural Engineering; 5+ years mechanical design for building systems; healthcare/commercial/education/civic exp; HVAC and building systems; Revit/AutoCAD.
Revit, AutoCAD
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1mo
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Principal Mechanical Engineer
El Segundo or Los Angeles
$175k-$215k/yr OnsiteFull Time
CHAOS Industries
CHAOS Industries: Develops advanced radar and sensing systems for modern defense.
8+ YOEBachelor's in Mechanical Engineering, 8+ years platform-level mechanical design and system integration for aerospace/defense, SolidWorks and FEA experience, prototyping skills, MIL‑STD familiarity, and ability to obtain a U.S. security clearance.
SolidWorks, NASTRAN, ABAQUS, ANSYS, COMSOL
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