Jobs/Roles/Mechanical & Physical Systems

Mechanical & Physical Systems Jobs

Mechanical, aerospace, and physical-systems engineering roles at hard-tech companies.

2,567 open roles · Updated Sep 23, 2026

2,567 jobs

Anduril Industries Winter 2027 Warhead Engineer Co-op

Costa Mesa, CA

$71k–$104k / year

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

Nscale Senior Mechanical Engineer - HVAC, Cooling (Data Centre)

South Korea

Job type: Mechanical & Physical Systems
Seniority: Senior
Sector: Compute & Semiconductors

Isar Aerospace Mechanisms Design Engineer (m/f/d)

Germany

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

Shield AI Summer 2027 - Mechanical Engineering Intern

Seattle, WA · Washington, D.C. · Dallas, TX

$79k–$135k / year

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

K2 Space Senior Mechanisms Engineer – Fluids & Pumps

Los Angeles, CA

$140k–$175k / year

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

Saronic Marine Build Engineer

Franklin, LA

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

Castelion Senior Propulsion Engineer (Rocket Motors)

Rio Rancho, NM

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

Zipline Maintenance Tool Engineering Intern (Spring 2027)

Esparto, CA

$77k / year

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

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CesiumAstro Senior Mechanical Engineer

Westminster, CO

$113k–$136k / year

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

Cowboy Space Corporation Fluids Engineer - Propulsion Valves, Ducts, Lines

Kent, WA · Washington, D.C.

$130k–$195k / year

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

Ursa Major Senior Responsible Engineer (RE), Solid Missile Systems

Berthoud, CO

$118k–$147k / year

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

Harmattan AI Aerodynamic Engineer

Morocco

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

Fluidstack Structural Engineer

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

$164k–$206k / year

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

Commonwealth Fusion Senior Mechanical Engineer – Cable Magnets

Devens, MA

$110k–$185k / year

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

Varda Space Structures Engineering Internship - Spring 2027

El Segundo, CA

$69k / year

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

Inversion Staff Mechanisms Engineer

Playa Vista, CA

$161k–$221k / year

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

SpaceXAI Reliability Engineer (Data Center Infrastructure)

Southaven, MS · Memphis, TN

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

Rivan Utility Scale Design Engineer

United Kingdom

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

Hermeus Chief Engineer - Airbreathing Propulsion Test

Jacksonville, FL

$139k–$247k / year

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

Aalo Atomics Spring 2027 Mechanical Engineering Internship - Idaho Falls, ID

Idaho Falls, ID

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

Oklo Mechanical Design Engineer - Core Mechanical Design

Remote · Santa Clara, CA

$115k–$170k / year

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

Firefly Aerospace Spacecraft Propulsion Engineer I (Valves)

Cedar Park, TX

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

SpaceX Sr. Power Plant Engineer

Starbase, TX

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

Relativity Space Staff Mechanisms Engineer

Long Beach, CA

$164k–$246k / year

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

Rocket Lab Propulsion Analyst Intern Summer 2027

Long Beach, CA

$58k / year

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

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Frequently asked questions

How many mechanical & physical systems jobs are on BuildList?: There are currently 2,567 open mechanical & physical systems roles listed on BuildList, refreshed hourly straight from company career pages.
What kinds of companies are hiring mechanical & physical systems?: Ambitious, fast-growing companies building the future — across AI, defense, aerospace, robotics, energy, and more. You can filter the list by sector, company stage, experience level, and location.
Are there remote mechanical & physical systems jobs?: Yes. Use the location filter, or open the remote view for this role to see only fully-remote mechanical & physical systems openings.
How do I apply for mechanical & physical systems jobs?: 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.