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166 engineering internship jobs at 93 companies in Diamond Bar, CA

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Additive Engineering Internship (Fall 2026)
Los Angeles or Hawthorne or El Segundo
$30-$35/hr OnsiteInternship
Freeform
Freeform: Deploys autonomous AI-powered metal 3D printing factories.
Currently enrolled in a bachelor’s in mechanical or aerospace engineering (ABET); hands-on design experience from internships or clubs; strong mechanical fundamentals. MATLAB scripting, metal additive/CNC experience, and advanced degrees preferred.
MATLAB, Design for Additive Manufacturing (DFAM), Design for Manufacturing (DFM), Geometric Dimensioning and Tolerancing (GD&T), CNC
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3w
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Fall 2026 - Engineering Internship/Co-Op
Venice, California, United States
$30-$50/hr OnsiteInternship
Omnis Corporation
Omnis Corporation: Developing LEO satellite constellations for global broadband internet.
0.25+ YOEEnrolled in a bachelor's in engineering/physics/math; 3+ months applied engineering experience; U.S. citizen/green card holder or authorized to work (F-1 with work authorization allowed); GPA and project experience preferred.
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Mechanical Engineering Internship - Fall 2026
Torrance, California, United States
OnsiteInternship
Vital Lyfe
Vital Lyfe: Develops portable devices that produce clean drinking water anywhere.
Currently pursuing a Mechanical Engineering degree; hands-on prototyping and testing experience; able to stand long periods and lift up to 50 lbs; able to work 100% onsite in Torrance, CA.
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Robotics Engineering Co-Op Internship
Los Angeles, California, United States
$25/hr OnsiteMultiple Commitments Available
Sorting Robotics
Sorting Robotics: Manufacturer of automated robotic systems for cannabis production.
Pursuing a degree in engineering/CS/robotics, basic robotic systems knowledge and programming (Python, C++), strong analytical and communication skills, teamwork, willingness to learn, proof of COVID-19 vaccination, authorized to work in the U.S.
Python, C++
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Construction Engineering Internship (Texas/Arizona/Florida/California) - Austin Commercial
Dallas-Fort Worth or Austin or Houston or Phoenix or Orlando or Tampa or Los Angeles
OnsiteMultiple Commitments Available
Austin Industrial
Austin Industrial: Construction and maintenance services for industrial facilities.
Seeking interns for paid construction engineering internships; duties include processing submittals, RFIs, field layout with survey instruments, documenting drawings and supporting quality/safety tasks.
level, theodolite, total station
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Return Engineering Internship, Summer 2027
Irvine or Draper or Salt Lake City
$54k-$72k/yr OnsiteFull Time
Edwards Lifesciences
Edwards LifesciencesNYSE: EW: Designs and manufactures medical devices for structural heart disease.
Currently enrolled university student (graduating Dec 2027 or later), available full-time May/June–Aug 2027, comfortable in lab work, GPA 3.0+, no visa sponsorship accepted.
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Manufacturing Engineering Internship
El Segundo, California, United States
$20-$30/hr OnsiteMultiple Commitments Available
Space Kinetic
Space Kinetic: Developing propellant-free systems for deploying payloads in space.
Currently enrolled or recent graduate in Mechanical, Aerospace, or Electrical Engineering; analytical and electrical skills; SolidWorks experience preferred; must be U.S. citizen/permanent resident/refugee/asylee or eligible for required export authorizations; able to obtain government security clearance.
SolidWorks
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2mo
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Mechanical Engineering Intern Fall 2026
Long Beach, California, United States
$28/hr OnsiteInternship
Rocket Lab
Rocket LabNasdaq: RKLB: Operates launch vehicles and manufactures satellites for space missions.
0.25+ YOEEnrolled in engineering, physics, or math degree; GPA 3.0+; 3+ months engineering experience; on-site 12-week internship in Fall 2026.
CAD/ CAM software, NX, Teamcenter, FEA software, ANSYS, Simcenter 3D, FEMAP/NASTRAN, 3D printing, Geometric Dimensioning & Tolerancing
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Spring 2027 Engineering Intern - Undergraduate
Seattle or Van Horn or Huntsville or Denver or Brevard County or Los Angeles or Longmont
$32/hr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
Undergraduate student (sophomore+), U.S. work-authorized, available full-time during internship, strong communication skills and passion for space; related coursework or hands-on engineering experience preferred.
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2026 Fall Internship - Supplier Quality Engineering Intern
Long Beach, California, United States
$35-$40/hr OnsiteFull Time, Internship
Vast
Vast: Develops and operates commercial artificial-gravity space stations.
Enrolled in a Bachelor's or Master's engineering program; able to work full-time onsite in Long Beach for a 12-week internship; willing to work overtime/weekends; able to lift up to 25 lbs; support supplier screening, testing, and audits.
ERP
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Engineering Intern - McKenna Engineering & Equipment Company
Gardena, California, United States
$20/hr OnsiteInternship
FloWorks
FloWorks: Distributes industrial flow control products and valve automation services.
Currently pursuing an engineering degree; familiarity with pump hydraulics, pneumatic and piping systems; CAD and Microsoft Office proficiency; strong analytical and communication skills.
AutoCAD, SolidWorks, Microsoft Word, Microsoft Excel, Microsoft Outlook
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Summer 2027 - Software Engineering Internship
Colorado Springs or Irvine or Longmont or Fremont or Rochester or San Jose
$35-$46/hr OnsiteInternship
Western Digital
Western DigitalNASDAQ: WDC: Design and manufacture data storage devices and systems.
Currently pursuing a Bachelor's or Master's in a technical field, experience with one or more programming languages (C,C++,Python,Java,Go,SQL,JavaScript), strong problem-solving and communication skills.
C, C++, Python, Java, Go (Golang), SQL, JavaScript, Microsoft Office, Git, Linux, IDEs
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Environmental, Health & Safety Internship
South Gate, California, United States
OnsiteInternship
Precision Castparts Corp.
Precision Castparts Corp.NYSE: BRK.B: Manufacturer of complex metal components for aerospace and industrial markets.
0+ YOEPursuing degree in engineering/safety/EH&S or related field; 10+ credits; GPA 3.0+; on-site internship; OSHA/EPA familiarity; MS Office proficiency.
Gensuite, Microsoft Office
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2026-2027 Facilities Engineering Chemical Engineering Intern
Houston or Bakersfield or Belle Chasse or Midland or Geismar or El Segundo or Pasadena or Pascagoula or Covington or Salt Lake City or Richmond or Ames or Greeley
$28/hr OnsiteInternship, Full Time
Chevron
ChevronNYSE: CVX: Global energy producing oil, gas, and petrochemicals.
Pursuing bachelor's or master's in chemical engineering; strong academics, communication, teamwork, problem-solving; ability to demonstrate Chevron Way.
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Engineering Intern
Burbank, California, United States
$25/hr OnsiteInternship
Senior
SeniorLondon Stock Exchange: SNR: Designs and manufactures high-technology components for aerospace and land vehicles.
Working toward or recently graduated with BS/MS/PhD in Mechanical/Aerospace/Physics; proficient in MS Office, MATLAB or programming (VBA/Python); strong problem-solving and communication; able to work 24-40 hrs/week onsite.
Microsoft Word, Microsoft Excel, Microsoft PowerPoint, MATLAB, VBA, Python
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Engineering Intern (Part-Time)
Santa Ana, California, United States
$20-$21/hr OnsitePart Time, Internship
City of Santa Ana
City of Santa Ana: Provides essential public services and infrastructure to Santa Ana residents.
Currently enrolled undergraduate in engineering/construction-related curriculum with GPA ≥2.5, knowledge of AutoCAD or MicroStation and Microsoft Office, valid driver’s license, ability to conduct field investigations and office tasks.
AutoCAD, MicroStation, Microsoft PowerPoint, Microsoft Excel, Microsoft Word, Microsoft Access
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Engineering Intern
Rancho Santa Margarita, California, United States
$20-$23/hr OnsiteMultiple Commitments Available
Virtium
Virtium: Designs and manufactures industrial-grade storage and memory modules.
Current college student in EE/CE/CS or related field; basic hardware/embedded systems knowledge; strong analytical and documentation skills; U.S. work authorization required; no visa sponsorship.
Python, C, C++
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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
Huntsman
HuntsmanNYSE: HUN: Manufactures and markets chemical products for consumer and industrial markets.
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
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2mo
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Mechanical Engineering Intern
Torrance, California, United States
$20-$25/hr OnsiteInternship
Hexagon
HexagonNasdaq Stockholm: HEXA B: Global leader in digital reality and autonomous technology solutions.
High school diploma or equivalent; pursuing BS in Mechanical Engineering preferred; CAD experience with CREO; knowledge of GD&T and tolerance analysis; ability to document designs and assist in product lifecycle processes.
CREO, GD&T, MRP (Syteline), Windchill
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Geotechnical Engineering Intern
Irvine, California, United States
OnsiteInternship, Part Time
HDR
HDR: Global provider of engineering, architecture, environmental and construction services.
Currently enrolled in an undergraduate or graduate engineering program; basic Microsoft Office skills; willingness to work on-site and in the field; strong problem-solving, communication, and attention to detail; ~20 hours/week.
Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Geotechnical software
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