Principal Mechanical Engineer

San Jose, CAPosted 23 days ago

Role Overview

Muonspace is hiring a Principal Mechanical Engineer. This is a full-time hybrid role, based in San Jose. Part of Muonspace's Qa hiring, posted 3 weeks ago. Full responsibilities, required qualifications, and the apply link are listed in the description below.

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Job description

About the role

Muon seeks a Principal Mechanical Engineer to join our Mechanical Engineering team, reporting to the Director of Mechanical Engineering. This role will be deeply technical with a focus on solving the most demanding design, analysis, test, reliability, and manufacturing challenges across multiple spacecraft platforms. This role will also have the opportunity to frequently be hands-on with both prototype and production hardware.

You will serve as a technical leader, mentor, and advisor to others on the mechanical team, leveraging previous experience in designing & building spacecraft to push boundaries and design industry leading “new space” satellites for many different commercial and national security applications. Additionally, you will help define product roadmaps & use a breadth of knowledge to make system level tradeoffs and optimizations.

This hybrid role requires onsite work at our San Jose location three days a week.

Responsibilities

Serve as a technical advisor and domain expert, leading the team to optimal designs of spacecraft structures and components
Identify opportunities and lead efforts to improve performance, reduce mass, lower cost, improve manufacturability of current spacecraft platforms.
Interface directly with Muon’s product & business teams to understand market needs define multi-year roadmaps for mechanical subsystems
Act as a force multiplier by providing strong, hands-on mentorship to mechanical engineers at all levels, developing their technical skills and systems-level thinking
Define mechanical team standards and best practices
Contribute broadly to hiring, onboarding, and training of mechanical engineering talent, helping build a culture of technical excellence

Required Qualifications

12+ years of experience designing, building, and testing flight hardware in the space industry, with multiple programs through on-orbit operations.
Strong mentorship experience with demonstrated success in developing junior and mid-level engineers & directly or indirectly leading a team of engineers.
Proven track record of optimizing and maturing existing designs and proven approach to clean-sheet development
Expert technical knowledge of structural mechanics and analysis, thermal management and modeling, environmental testing (TVAC, vibration)
Experience with a variety of manufacturing methods and techniques for space applications, including machining, composites, molding, 3D printing, etc
Mastery of standard tools: CAD (SolidWorks preferred), PLM, ERP, FEA, test hardware and equipment
Expert-level skills with drawings, GD&T, BOMs, FAIs, tolerance budgets, and mass budgets
Experience managing external vendors for part development and manufacturing
Excellent communication, presentation, and coordination skills
B.S. or higher in Mechanical Engineering or related field

Nice-to-have Skills

Experience with deployable structures (solar arrays, antennas, mechanisms)
Optomechanical instrument or payload design experience
Software skills in Python, MATLAB, or similar
Experience with reaction wheels, torque rods, star trackers, or other ADCS components
Large assembly management in SolidWorks PDM, Duro, or similar PLM
Experience running structural analyses (FEMAP, ANSYS)
Track record of establishing engineering standards at an organizational level

Salary

The salary range for this role is $222,000 - $250,000, plus a competitive equity grant and comprehensive benefits package. Final compensation will be determined based on skills, qualifications, experience, and geographic location as assessed during the interview process.

About Muon Space

Founded in 2021, Muon Space is an end-to-end Space Systems Provider that designs, builds, and operates LEO satellite constellations delivering mission-critical data. Our revolutionary, integrated technology stack enables customers to optimize every dimension of their missions for faster time-to-orbit and superior constellation remote sensing performance. Our state-of-the-art facility in the heart of Silicon Valley is optimized for manufacturing spacecraft and rapid, flexible payload integration at scale. From climate monitoring to national security, Muon Space is dedicated to delivering Earth Intelligence for a safer and more resilient world.

Taking Care of Our Team

At Muon salary is only part of our total compensation package. In addition to salary, full-time employees receive equity compensation as well as benefits including medical, dental, and vision insurance, a 401k retirement plan, short & long term disability and life insurance. We also offer three weeks paid vacation for new employees, along with 12 paid holidays, unlimited sick time and paid parental leave.

Our mission embraces the entire planet and we believe our team should too. Muon is dedicated to creating a diverse and dynamic company and workforce. We believe in equal employment opportunity regardless of race, color, ancestry, religion, sex, age, national origin, citizenship, sexual orientation, marital status, disability, or gender identity. We value diversity in the workplace, and that starts with our applicants. We encourage you to apply, even if you don't check all the boxes, and we look forward to reviewing your application! In addition, if you need a reasonable accommodation as part of your application for employment or interviews with us, please let us know.

ITAR/EAR Requirements

This position requires access to export controlled information. To conform to U.S. Government export regulations applicable to that information, applicant must either be (A) a U.S. person, defined as a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (green card holder), (iii) refugee under 8 U.S.C. § 1157, or (iv) asylee under 8 U.S.C. § 1158, (B) eligible to access the export controlled information without a required export authorization, or (C) eligible and reasonably likely to obtain the required export authorization from the applicable U.S. government agency. The Company may, for legitimate business reasons, decline to pursue any export licensing process.

About Muonspace

Muonspace

QaHybrid

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Frequently Asked Questions

How do I apply for the Principal Mechanical Engineer position at Muonspace?

Use the Apply button above to submit your application directly to Muonspace. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.

Is the Principal Mechanical Engineer role at Muonspace remote or in-office?

This is a hybrid role based in San Jose. Expect a mix of in-office and remote days, with the specific cadence set by the hiring manager.

What does a Principal Mechanical Engineer at Muonspace earn?

Muonspace has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.

When was the Principal Mechanical Engineer role at Muonspace posted?

This role was posted on June 16, 2026 (23 days ago). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.

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