Mechanical Engineering Intern Jobs in California

Mechanical Engineering Intern jobs in California concentrate in aerospace and defense, semiconductor manufacturing, clean energy, and advanced manufacturing, making it one of the most active markets in the country for early-career engineers. The largest hiring metros are Los Angeles, San Jose, and San Diego, where companies like Northrop Grumman, Apple, and General Dynamics have long-standing intern programs. The most in-demand specialties include thermal systems, product design, and finite element analysis. Find a role that fits below and apply directly.

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Overview

Open roles20
Top employerImpulse Space
Top cityLos Angeles, CA
Cities hiring11
Work type67% On-site
Top industryScience

Showing 5 of 20+ Mechanical Engineering Intern jobs

Moog, Inc
Intern, Mechanical Engineering
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Moog, Inc
Added 2d ago
Intern, Mechanical Engineering
Moog, Inc
Torrance, California
Engineering (Non-Software)
Systems Administration
Technical Program Management
$28 - $35/hr
On-Site
10,000+

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IMEG
Mechanical Engineering Intern | Ontario, CA
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IMEG
Added 2d ago
Mechanical Engineering Intern | Ontario, CA
IMEG
Ontario, California
Business Strategy
Consulting & Professional Services
Project Management
$22 - $24/hr
Bachelor of Science
1,001-5,000

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Impulse Space
Avionics Mechanical Engineering Intern (Summer 2027)
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Impulse Space
Added 3d ago
Avionics Mechanical Engineering Intern (Summer 2027)
Impulse Space
Redondo Beach, California
Aerospace Engineering
Engineering (Non-Software)
Mechanical Engineering
On-Site

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MKS
2027 Summer Mechanical Automation Engineering Intern
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MKS
Added 3d ago
2027 Summer Mechanical Automation Engineering Intern
MKS
Milpitas, California
Healthcare Administration
Patient Services & Wellbeing
Physical Therapy
$27 - $31/hr
5,001-10,000

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Rocket Lab USA
Mechanical Engineering Intern Spring 2027
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Rocket Lab USA
Added 4d ago
Mechanical Engineering Intern Spring 2027
Rocket Lab USA
Long Beach, California
Electrical Engineering
Engineering (Non-Software)
Mechanical Engineering
1,001-5,000

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See All 20 Mechanical Engineering Intern Jobs in California

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Mechanical Engineering Intern Jobs by City in California

Where California roles are concentrated, by current openings.

Los Angeles
5 jobs
San Diego
3 jobs
Torrance
2 jobs
Redondo Beach
2 jobs
San Francisco
2 jobs
Brea
1 job
Ontario
1 job
Milpitas
1 job
Inglewood
1 job

Mechanical Engineering Intern Job Market in California

A snapshot from current California openings, updated as new roles post.

Who's Hiring

Impulse Space
Impulse Space2 open roles
Syska Hennessy
Syska Hennessy2 open roles
MKS
MKS1 open role

Top Industries Hiring

  • Science & Research

What California Employers Look For

The qualifications that appear most often in mechanical engineering intern jobs across California.

  • Currently enrolled in an accredited mechanical engineering or related undergraduate degree program
  • Proficiency in CAD software such as SolidWorks, CATIA, or AutoCAD for design tasks
  • Foundational knowledge of thermodynamics, fluid mechanics, and materials science coursework
  • Experience with engineering simulation tools such as ANSYS or MATLAB is preferred
  • Strong written and verbal communication skills for cross-functional team collaboration
  • Ability to work on-site in a lab or manufacturing environment with minimal supervision

Mechanical Engineering Intern Jobs in California: Frequently Asked Questions

How do you become a mechanical engineering intern in California?

The concrete path starts with enrollment in an ABET-accredited mechanical engineering program at a California university such as UC San Diego, Cal Poly San Luis Obispo, or USC. California does not require an intern to hold a Professional Engineer license, but completing the Fundamentals of Engineering exam while still a student strengthens applications significantly. Employers in aerospace and semiconductor sectors additionally value hands-on lab coursework, CAD portfolio projects, and participation in engineering student organizations like ASME chapters on campus.

Which companies hire mechanical engineering interns in California?

Companies currently hiring mechanical engineering interns in California include Impulse Space, Syska Hennessy, and MKS, per current listings on Migrate Mate as of September 2026. California's concentration of aerospace primes, defense contractors, and consumer electronics firms means intern cohorts tend to be structured, recurring programs with mentorship components rather than ad-hoc seasonal roles.

Which California cities have the most mechanical engineering intern jobs?

Los Angeles, San Diego, and Torrance have the most mechanical engineering intern openings in California. Los Angeles draws high volume from aerospace and defense primes headquartered in the region, San Jose reflects Silicon Valley's hardware and semiconductor demand, and San Diego benefits from its dense cluster of defense contractors and biomedical device companies that run consistent intern pipelines.

Are there remote mechanical engineering intern jobs in California?

Yes, but they're rare. Mechanical engineering intern work is fundamentally hands-on, involving lab testing, prototyping, and equipment operation that requires physical presence. About 33% of mechanical engineering intern openings tied to California are remote or hybrid as of September 2026, and those tend to be limited to simulation-heavy or design-review tasks where CAD and analysis work can be completed off-site without access to physical hardware.

How can I get hired as a mechanical engineering intern in California with little or no experience?

The most realistic entry path is applying to formal intern programs at large California employers before junior year, since companies like Lockheed Martin, Raytheon, and Applied Materials recruit specifically for candidates with limited experience and provide structured training. On-campus project teams, SAE Formula car builds, or senior design competitions serve as credible portfolio substitutes for work history. An FE exam pass and a SolidWorks or CATIA certification give candidates a concrete edge in a competitive applicant pool.

Where can I find and apply to mechanical engineering intern jobs in California?

You can find and apply to mechanical engineering intern jobs in California on Migrate Mate, which lists current California openings across aerospace, semiconductor, clean energy, and advanced manufacturing employers. Find roles that fit your background and apply directly without creating an account or going through a third-party process.

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