Space Technology, Aerospace, Satellite Communications

Mechanical Engineer III

RockvilleOnsiteFull TimeCA$125,000–CA$175,000 /yrPosted 5 days ago

Is this role right for you?

Upload your resume and get a skill-by-skill breakdown — see exactly where you match, where you're close, and what to highlight. Not a mystery percentage.

Get a tailored resume highlighting what this role needs.

Required skills

Mechanical Engineer III
flight hardware
spacecraft
Creo
GD&T
ASME Y14.5
supplier coordination
procurement
requirements definition
manufacturing

Nice to have

Windchill
PLM
mass properties
alignment
configuration capture
as-built management

Role summary

Quantum Space is seeking an experienced Mechanical Engineer III to lead the design, development, integration, and testing of flight hardware for next-generation spacecraft. This role involves end-to-end ownership of mechanical components and subsystems, from requirements definition to manufacturing and testing. Responsibilities include CAD design in Creo, applying GD&T, coordinating with suppliers, and supporting build/integration efforts. The ideal candidate has 7+ years of aerospace hardware experience, strong GD&T fundamentals, and hands-on flight hardware development experience. The position offers significant ownership and impact in a fast-paced environment.

Quantum Space is redefining mobility and maneuverability in space. Our high-mobility spacecraft platforms support national security, civil, and commercial missions with unmatched flexibility and propulsion capability. We build fast and iterate quickly.

Who We’re Looking For

We are seeking an experienced and highly motivated Mechanical Engineer III to lead the design, development, integration, and testing of flight hardware for our next-generation spacecraft programs. In this role, you will take ownership of mechanical components and subsystems throughout the full hardware development lifecycle, from requirements definition and detailed design through manufacturing, assembly, integration, and testing.

You will play a critical role in ensuring the performance, reliability, and manufacturability of mission-critical spacecraft hardware while collaborating closely with mechanical engineering, systems engineering, assembly, integration and test (AIT), and manufacturing teams. This position is ideal for an engineer with strong mechanical design expertise, hands-on flight hardware development experience, and the ability to independently lead technical execution in a fast-paced, collaborative environment.

Where You’ll Make an Impact

Own mechanical components/subsystems end-to-end: requirements, design, analysis coordination, release, and integration support

Develop CAD and drawings in Creo; apply GD&T and define inspectable requirements

Drive interface closure: envelope/keep-outs, fastener patterns, datums, alignment needs, harness/thermal accommodations

Support spacecraft build and integration: issue triage, rapid root-cause collaboration, and corrective design updates

Develop and execute verification plans: functional checks, fit checks, environmental test prep support, and acceptance/qualification evidence generation

Support design reviews (PDR/CDR), test readiness reviews, and configuration boards with clear technical content

Coordinate with suppliers and procurement: clarify requirements, review vendor designs, and support receiving/inspection disposition

What It Takes

Bachelor's degree or Master's degree in Mechanical Engineering or related field

7+ years relevant experience with aerospace/space hardware development

Proficiency in Creo; working knowledge of Windchill or similar PLM

Strong GD&T fundamentals (ASME Y14.5) and drawing package quality discipline

Experience supporting hardware through build/test cycles, not just design-in-a-vacuum

Nice-to-Have Experience

Spacecraft integration exposure: mass properties, alignment, configuration capture, as-built management

Experience writing or reviewing work instructions / build travelers

Familiarity with environmental testing and test readiness processes

What You’ll Get

Ownership – Lead mechanical design and development of mission-critical spacecraft hardware from requirements through integration and testing

Innovation – Contribute to next-generation spacecraft technologies enabling advanced space mobility, maneuverability, and mission capabilities

Impact – Play a direct role in delivering reliable, high-performance spacecraft hardware supporting national security, civil, and commercial missions

Growth – Join a collaborative, fast-paced engineering team where you can expand your technical expertise, take ownership of meaningful projects, and help shape the future of space technology

Compensation – Competitive salary, equity, and comprehensive benefits including medical, dental, vision, generous leave, FSA, 401(k) matching, and equity sharing

Location: Rockville, MD or Hawthorne, CA

Base Salary: $125,000-175,000

The salary range for this role is an estimate based on a wide range of compensation factors. Actual salary offer may vary based on (but not limited to) work experience, education and/or training, critical skills, and/or business considerations. Highly competitive equity grants are included in the majority of full time offers; and are considered part of Quantum Space's total compensation package.

Additional Requirements

To comply with U.S. Government space technology export regulations, including ITAR, applicants must be a U.S. citizen, lawful permanent resident, protected individual per 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.

Apply now. Join us in building the next generation of spacecraft.

Ready to apply?

You'll be redirected to Quantum Space's application page.