28 mechanical engineering intern jobs at 19 companies in Fontana, CA
1mo
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Mechanical Engineering Intern
Akron or Ashtabula or Conroe or Freeport or Houston or The Woodlands or McIntosh or Geismar or Los Angeles
OnsiteInternship, Full Time
Pursuing a bachelor's in Mechanical Engineering, 3.0+ GPA preferred, strong mechanical aptitude and communication, proficiency with Microsoft Office, authorized to work in the U.S. without sponsorship.
Microsoft Office
1d
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Mechanical Engineering Intern/Co-Op [Propulsion]
Long Beach, California, United States
OnsiteInternship
Currently pursuing a mechanical or aerospace engineering degree; CAD experience with NX or SolidWorks; familiarity with manufacturing and preferably hands-on fabrication experience.
NX, SolidWorks, CAD, 3D printing
1w
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Mechanical Engineering Intern / Co-op, Rocket Motors - Fall 2026
Torrance or Los Angeles or Mojave
$25-$40/hr OnsiteMultiple Commitments Available
1+ YOECurrently enrolled in a bachelor's or master's engineering program, with 1+ year of hands-on student engineering projects, hardware development experience, 3D CAD and drawing skills, and U.S. work authorization.
3D CAD, SolidWorks, GD&T
9h
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Mechanical Engineering Intern (Fall 2026)
Tustin, California, United States
$20/hr OnsitePart Time, Internship
Currently enrolled in an engineering bachelor's or master's program; CAD experience, strong communication, teamwork, adaptability, and willingness to work onsite or at project locations. Prior internship is optional.
CAD, AutoCAD, Revit
2mo
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2027 Mechanical Engineer Intern
Atlanta or Boston or Costa Mesa or Irvine or Seattle or Huntsville
$30-$45/hr OnsiteInternship
Pursuing a bachelor's in mechanical engineering or related field, rising senior status, collegiate project/lab experience, CAD and hands-on fabrication skills, strong engineering fundamentals, U.S. Person required.
CAD, NX, Teamcenter, SolidWorks, FEA, CFD
1w
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Engineering Intern – Summer 2027
Fridley or Tempe or Eatontown or Santa Rosa or Lafayette or Boulder or Plymouth or Mounds View or Irvine or North Haven or Memphis or Newton or Dexter or Santa Ana or Mansfield or Fort Worth or Minneapolis or Brooklyn Center or Jacksonville or Boston or Brooklyn Park
$27-$45/hr OnsiteFull Time
Enrolled in BS/MS engineering (biomedical, mechanical, electrical, industrial, materials, computer or related) with expected graduation 2027–2029; U.S. work authorization required; minimum 3.0 GPA preferred; prior engineering coursework/projects preferred.
CAD
7h
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Mechanical Engineering Internship/Co-op
El Segundo or Los Angeles County
OnsiteInternship, Full Time
0.25+ YOEEnrolled in an engineering, physics, or math bachelor's program; 3+ months applied engineering experience; export-control compliance; testing and collaborative engineering skills.
pressure transducers, thermocouples, resistance temperature detectors, relays, solenoid valves
2mo
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Software Engineering Intern, Vehicle Controls - Fall 2026
Irvine or Palo Alto
$38-$51/hr HybridInternship, Full Time
Enrolled in Bachelor's or Master's program in Electrical/Mechanical Engineering or Computer Science; proficient in C/C++ and Python; RTOS experience preferred; familiar with CAN/LIN/UDS/DoIP; experience with microcontrollers and PID controls.
C/C++, Python, RTOS, CAN, LIN, UDS, DoIP, Microcontrollers, PID
1mo
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ME Intern
Irvine, California, United States
$18-$28/hr OnsiteInternship, Part Time
US citizen or Green Card required; ability to read work orders, follow instructions, good communication, attention to detail; minimum 16 hours/week; background check and drug test possible.
1w
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Intern, Industrial Engineering
Ontario, California, United States
OnsiteInternship, Part Time
0+ YOEPursuing bachelor's/master's in industrial or mechanical engineering, 0-2 years experience, knowledge of AutoCAD, Solidworks, PLM, Microsoft Office, ability to perform time studies and support lean improvements.
AutoCAD, Solidworks, PLM, Microsoft Office
2w
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Quality Engineer Intern
Santa Ana, California, United States
OnsitePart Time
Mechanical or Industrial Engineering student; no experience necessary; experience with Microsoft Office; ability to develop and update production work instructions and participate in lean activities.
Microsoft Office
3mo
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CNC Programmer Intern
Yorba Linda, California, United States
OnsiteInternship, Full Time
Pursuing a degree or certificate in Manufacturing Engineering, Mechanical Engineering, Industrial Technology, Mechatronics, or CNC Machining; basic CNC, GD&T, drawings, and CAM software knowledge.
G-code, CAM software
3mo
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Intern, Manufacturing Chemistry
Aliso Viejo, California, United States
$21-$34/hr OnsiteInternship
Working toward a Bachelor’s or Master’s in Mechanical/Biomedical Engineering or related; interest/experience in process development; coursework in statistics and tooling design; SolidWorks a plus; computer skills in Word, Excel, PowerPoint; mechanical aptitude.
SolidWorks, Microsoft Word, Microsoft Excel, Microsoft PowerPoint
1w
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Operations Intern - Summer 2027
Rancho Cucamonga or Peachtree City or Mount Prospect or Greenfield or Lowell or Mentor or Painesville or Fairport Harbor or Miamisburg or Oak Harbor or Neenah
$26-$29/hr OnsiteInternship
Pursuing a Bachelor’s in engineering (chemical/mechanical/industrial preferred), previous internship or relevant experience, willing to relocate, reliable transportation, pass background and drug screening; sponsorship not available.
RFID
2w
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Quality Engineer Intern
Santa Ana, California, United States
OnsitePart Time
Mechanical or Industrial Engineering student; no prior experience necessary; experience with MS Office; ability to develop and update production work instructions and participate in lean activities.
Microsoft Office
2d
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2026 Intern Conversion - Industrial Engineer I
Seattle or Van Horn or Denver or Huntsville or Florida or Arlington or Los Angeles or Longmont or Reston or California or Colorado or Washington or Virginia
$69k-$105k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
Completed a 2026 Blue Origin internship, enrolled in or recently graduating from college, and holds a minimum B.S. in mechanical, aerospace, or astronautical engineering; U.S. work authorization required.
Defense Biometric Identification System (DBIDS)
3mo
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Ottawa Infotainment Internship Program – “Alligator Wrestling Program” (Summer 2026)
Ottawa or Detroit or Windsor or Los Angeles
OnsiteInternship
Curious, self-directed candidates with problem-solving skills and interest or background in software, electrical, mechanical, design, or supply chain/business operations; able to own deliverables and present to leadership.
5d
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Mechanisms & Payload Internship - Spring 2027
El Segundo or Los Angeles or Washington or Huntsville
$33/hr OnsiteInternship, Full Time
Enrolled in an accredited bachelor's or master's engineering program; experience with mechanical CAD and electromechanical hardware; basic programming, hand tools, and interest in machine-tool fabrication required.
NX, Python, mechanical CAD, drill press, lathe, mill
2mo
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Project Engineer
Jurupa Valley, California, United States
$81k-$110k/yr OnsiteFull Time
3+ YOEBachelor's in engineering or 3+ years in piping/construction/mechanical engineering; knowledge of cryogenic systems, CAD/SOLIDWORKS, NFPA/ASME/CGA codes; project coordination, modeling, drafting; frequent domestic/international travel.
SOLIDWORKS, CAD software, Microsoft Office Suite, CRM, ERP
2mo
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Engineer - Marine
Charleston or Boston or Houston or Seattle or Galveston or Miami or Long Beach or New York or United States or Oakland or Tampa or Savannah or Newark or Philadelphia or Norfolk or New Orleans
FieldFull Time
Must hold a USCG Merchant Mariner Credential (MMC) with international/national endorsements, valid TWIC and U.S. passport, USCG/STCW medical certificate, STCW endorsements, ability to lift 40 lbs, and experience with vessel engineering systems; maritime academy and Assistant Engineer experience preferred.
ABS Nautical Systems NS5, HELM, EMD, Detroit Generators
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