Jobs/Mechanical & Physical Systems/Los Angeles

Mechanical & Physical Systems Jobs in Los Angeles

Mechanical & Physical Systems roles at companies building the future — in Los Angeles.

789 open roles · Updated Sep 20, 2026

789 jobs

Radiant Director, Nuclear Engineering

El Segundo, CA

$173k–$237k / year

Job type: Mechanical & Physical Systems
Seniority: Director
Sector: Energy & Climate

Rivian Staff Structural Simulation Engineer

Irvine, CA

$137k–$172k / year

Job type: Mechanical & Physical Systems
Seniority: Staff / Principal
Sector: Transportation

Antares Mechanical Engineer - Electronics Packaging

Los Angeles, CA

$115k–$190k / year

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Energy & Climate

AMCA Lead Mechanical Engineer

El Segundo, CA

$150k–$200k / year

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Manufacturing

General Matter Summer 2027 Internship - Chemical Engineering

Los Angeles, CA

$62k–$83k / year

Job type: Mechanical & Physical Systems
Seniority: Intern
Sector: Energy & Climate

Divergent Robotic Simulation Engineer

Torrance, CA

$122k–$194k / year

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Manufacturing

Astrolab Staff Thermal Control Systems Engineer

Remote · Hawthorne, CA

Job type: Mechanical & Physical Systems
Seniority: Staff / Principal
Sector: Aerospace

GITAI Mechanical Engineering Intern / Co-op, Satellite Bus - Winter/Spring 2027

Los Angeles, CA

Job type: Mechanical & Physical Systems
Seniority: Intern
Sector: Aerospace

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Freeform Materials Engineer (New Grad Summer 2027)

Los Angeles, CA

Job type: Mechanical & Physical Systems
Seniority: Entry-Level
Sector: Manufacturing

General Galactic Electrolyzer Mechanical Design Engineer

El Segundo, CA

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Aerospace

Starpath Mechanical Engineer (Structures) - Space Solar

Hawthorne, CA

$100k–$160k / year

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Aerospace

Anduril Industries Winter 2027 Warhead Engineer Co-op

Costa Mesa, CA

$71k–$104k / year

Job type: Mechanical & Physical Systems
Seniority: Intern
Sector: Defense

K2 Space Senior Thermal Control System (TCS) Design Engineer

Los Angeles, CA

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Aerospace

Castelion Senior Materials & Process Engineer, Propellant Mix & Cast

Torrance, CA

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Defense

Impulse Space Senior Manager, Propulsion Systems

Redondo Beach, CA

$175k–$200k / year

Job type: Mechanical & Physical Systems
Seniority: Manager
Sector: Aerospace

CesiumAstro Principal Launch Vehicle Design Engineer II

El Segundo, CA

$149k–$199k / year

Job type: Mechanical & Physical Systems
Seniority: Staff / Principal
Sector: Aerospace

CHAOS Industries Principal Mechanical Engineer, Platform Integration

El Segundo, CA

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Defense

Fluidstack Mechanical Engineer, Demand Management

Austin, TX · New York, NY · San Francisco, CA · Los Angeles, CA · Seattle, WA

$208k–$263k / year

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Compute & Semiconductors

Inversion Principal TPS Materials Engineer

Playa Vista, CA

$175k–$244k / year

Job type: Mechanical & Physical Systems
Seniority: Staff / Principal
Sector: Aerospace

Varda Space Launch and Recovery Engineering Manager

El Segundo, CA

$170k–$246k / year

Job type: Mechanical & Physical Systems
Seniority: Manager
Sector: Aerospace

Hermeus Thermal Engineer

Los Angeles, CA

$92k–$140k / year

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Aerospace

SpaceX Materials Engineer, Polymer Development

Hawthorne, CA

$100k–$160k / year

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Aerospace

Rocket Lab Propulsion Design Intern Spring 2027

Long Beach, CA

$58k / year

Job type: Mechanical & Physical Systems
Seniority: Intern
Sector: Aerospace

Relativity Space Vehicle Structures Design Engineer II

Long Beach, CA

$104k–$156k / year

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Aerospace

Blue Origin Thermal Design Engineer II - Lunar Permanence

Seattle, WA · Space Coast, FL · Huntsville, AL · Denver, CO · Los Angeles, CA

Job type: Mechanical & Physical Systems
Seniority: Mid-Level
Sector: Aerospace

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Frequently asked questions

How many mechanical & physical systems jobs are in Los Angeles?: There are currently 789 open mechanical & physical systems roles in Los Angeles on BuildList, refreshed hourly from company career pages.
What companies hire mechanical & physical systems talent in Los Angeles?: The live list includes companies building the future across AI, defense, aerospace, robotics, energy, and more. Sort and filter the openings to compare employers, levels, sectors, and stages.
Are there remote mechanical & physical systems jobs outside Los Angeles?: Yes. BuildList has a dedicated remote mechanical & physical systems view for roles companies explicitly mark as remote. Regional restrictions can still apply.
How do I apply for mechanical & physical systems jobs in Los Angeles?: Every listing links straight to the company's own application page — BuildList doesn't sit between you and the employer, so there's no account or middleman.