47 process engineering intern jobs at 37 companies in California

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Process Engineering Internship (Fall 2026)
Los Angeles or Hawthorne or El Segundo
$30-$35/hr OnsiteFull Time, Internship
Freeform
Freeform: Deploys autonomous AI-powered metal 3D printing factories.
Currently pursuing a Bachelor's in materials science, physics, or engineering; experimental design and statistical data analysis experience; strong data analysis skills; experience with Python and/or MATLAB.
Python, MATLAB, R, JMP, Minitab
15h
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Process Engineering Intern, ESS
Burlingame, California, United States
$30/hr OnsiteInternship
Peak Energy
Peak Energy: Developing sodium-ion battery systems for utility-scale energy storage.
Pursuing a Bachelor's in engineering, knowledge of materials and battery components, strong problem-solving, communication and teamwork, hands-on manufacturing willingness; Six Sigma/Lean exposure preferred.
3w
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Metallurgical Engineering Intern
Alameda, California, United States
$35-$45/hr OnsiteInternship
Solcoa
Solcoa: Produces carbon-zero rare earth metals by recycling industrial magnets.
Enrolled in BS/MS in metallurgical engineering, materials science, or related field; hands-on lab/furnace experience; exposure to high-temperature processing; strong documentation and safety focus; on-site availability.
ICP-OES, SEM-EDS, LECO O/N, Python, MATLAB, FactSage, HSC
1mo
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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
2mo
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Process Engineer (Intern)
Milpitas, California, United States
$30-$40/hr OnsiteInternship, Full Time
Six Sigma Microelectronics
Six Sigma Microelectronics: A stable, high-technology manufacturing focused on semiconductor processes and soldering of high-reliability ICs.
0+ YOEPursuing BS in Chemistry, Process/Materials/Mechanical Engineering or related; basic tools, root-cause analysis, DOE; strong problem-solving and communication; MS Office; teamwork.
MS Office, Caliper, Micrometer, Optical Comparator, Reticle, Toolmakers Microscope
3d
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INTERN (MECHANICAL ENGINEERING) (1609)
Inglewood, California, United States
$20-$25/hr OnsiteInternship
The Marvin Group
The Marvin Group: Designs and manufactures military aerospace and defense hardware.
Must be a sophomore+ in mechanical engineering or related field; proficient in CAD (CATIA V5/SolidWorks), Microsoft Office; knowledge of manufacturing processes and GD&T; strong communication and teamwork skills.
CATIA V5, SolidWorks, SmarTeam PDM, PDM, Adobe, Microsoft PowerPoint, Microsoft Excel, Microsoft Word, Microsoft Project
2mo
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Intern - Electrical Engineering
Monrovia, California, United States
$27-$30/hr OnsiteMultiple Commitments Available
Attalon
Attalon: Designs and manufactures precision optical and laser systems.
0+ YOEPursuing BS in CS/Robotics/ME/EE/Physics/Applied Physics/Math; SolidWorks experience; scripting for automation; quick learner; robotics/embedded exposure; strong cross-disciplinary collaboration.
Solidworks, Automation, Robotics, Scripting, Computer Vision, Data processing
1mo
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Supplier Industrialization Engineering Intern (Fall 2026)
South San Francisco, California, United States
OnsiteFull Time, Internship
Zipline
Zipline: Operates an autonomous drone delivery system for medical supplies.
Undergraduate (completed 2nd year) or graduate student in engineering or related field; proficiency in 3D CAD (NX preferred), GD&T, manufacturing processes, APQP/PPAP, problem-solving frameworks (8D, FTA, Pareto), and process documentation.
NX, GD&T, APQP, PPAP, 8D, FTA, Pareto Analysis, FMEAs, Control Plans, Work Instructions, Zipline Approval Process (ZAP), PCBA
2mo
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Intern, Optical Packaging Process
Milpitas, California, United States
$28-$47/hr OnsiteInternship
PsiQuantum
PsiQuantum: Builds fault-tolerant quantum computers using silicon photonics technology.
Pursuing a bachelor’s in engineering, physics, or materials science; detail-oriented; team player; internship or lab experience is a plus.
Microsoft Excel, SOP, DOE, data visualization
1w
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Process and Thermal Performance Intern
Alameda or Florida
$35-$45/hr HybridInternship
Rondo Energy
Rondo Energy: Manufactures thermal batteries for industrial zero-carbon heat delivery.
Pursuing Bachelor's or Master's in Mechanical/Chemical engineering, coursework in thermodynamics/fluid mechanics/heat transfer, familiarity with 1D thermal-fluid analysis and simulation tools, strong math and communication skills.
AFT, Ebsilon, Aspen, MATLAB, Aspen Plus/HYSYS, CFD, FEA
3w
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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
1w
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Fall 2026 PhD Intern - Hardware Development Engineering
Fremont, California, United States
$42-$56/hr OnsiteInternship
Western Digital
Western DigitalNASDAQ: WDC: Design and manufacture data storage devices and systems.
Currently pursuing or recently completed PhD in engineering or core science; strong critical thinking, problem solving, and communication skills; ability to support photo process development, mask management, and execution of engineering projects.
3mo
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Senior Process Engineer, MSAT
Alameda, California, United States
$72-$89/hr OnsiteContract, Full Time
GeneFab
GeneFab: Specialized contract manufacturing for advanced cell and gene therapies.
6+ YOELead GMP implementation of internal platform processes for cell and gene therapy; tech transfer, regulatory support, and CMC documentation.
GMP, DoE, CMC, Regulatory documentation
1mo
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Engineer intern
Simi Valley, California, United States
OnsiteMultiple Commitments Available
M Wave Design
M Wave Design: Designs and manufactures passive RF and microwave components.
Currently enrolled in an engineering or science program (BSME/BSEE in process or equivalent), US person required, ability to work with technical drawings, basic CAD (SolidWorks/AutoCAD) exposure, strong communication and teamwork skills.
SolidWorks, AutoCAD
3mo
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Sr. Process Development Manager
Livermore, California, United States
$130k-$170k/yr OnsiteFull Time
Ferrotec
FerrotecTokyo Stock Exchange: 6890: Manufacturer of semiconductor equipment and thermal management solutions.
15+ YOE5+ MgmtLead R&D for thin-film deposition processes; manage scientists/engineers; international collaboration.
Thin Film Deposition, Sputtering, Evaporation, PLD, ALD, CVD, Profilometry, Ellipsometry, SEM, AFM, 4-point probe
2mo
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Intern, Manufacturing Chemistry
Aliso Viejo, California, United States
$21-$34/hr OnsiteInternship
MicroVention
MicroVention: Manufacturer of neurovascular medical devices for stroke treatment.
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
3w
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Manufacturing Engineer Intern
Santa Fe Springs, California, United States
$20/hr OnsitePart Time
RD Rubber Technology Corporation
RD Rubber Technology Corporation: Manufacturer of custom precision molded rubber components.
Internship requiring familiarity with engineering calculations, CAD modeling, prototyping, manufacturing processes, and the ability to prepare reports and support continuous improvement projects; hands-on manufacturing experience preferred.
CAD
3w
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Manufacturing Engineer - Intern
Santa Ana, California, United States
OnsiteMultiple Commitments Available
Regal Technology Partners: Manufacturer of mission-critical electronic systems for aerospace and defense.
Currently pursuing a Bachelor's in engineering, knowledge of manufacturing processes and lean principles, proficiency with Microsoft Office, strong analytical and problem-solving skills, ability to stand and lift up to 25 lbs.
Microsoft Excel, Microsoft Word, Microsoft PowerPoint
1w
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2027 Business Analyst Intern
San Diego, California, United States
$23-$40/hr OnsiteInternship
Solar Turbines
Solar TurbinesNYSE: CAT: Manufacturer of industrial gas turbines and turbomachinery systems.
Currently pursuing a Bachelor's or Master's in engineering or business-related field, GPA ≥2.8, familiarity with Lean/Six Sigma and process improvement, strong analytical and communication skills.
Microsoft Excel, Microsoft Power BI, Minitab, JMP
2mo
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Software Engineer Intern - Machine Learning Workflow
Santa Clara, California, United States
$20-$30/hr OnsiteInternship, Temporary
Halo Industries
Halo Industries: Manufactures silicon carbide wafers using laser-based slicing technology.
0+ YOEPursuing or recent graduate in software/CS/engineering; Python or C# experience; works with structured workflows and large datasets; able to debug issues and follow processes.
Python, C#, Git