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Thermal Engineer II Verified today

Muon Space · San Jose, CA · Mechanical · first seen 2026-09-03
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About the role

Muon Space is hiring a Thermal Engineer II to own the thermal design and analysis of spacecraft assemblies and subsystems - from hand calcs and models through TVAC test support. You'll work independently within your scope and partner across mechanical, electrical, and systems teams.

This position is hybrid and requires working on-site in San Jose, CA three days per week.

Responsibilities

  • Build and run thermal models (Thermal Desktop or similar): TVAC margin, conduction/radiation hand calcs, and transient analyses.
  • Own the thermal analysis package for an assembly or subsystem end-to-end.
  • Size radiators and heaters and define component thermal limits and margins.
  • Support thermal verification and TVAC test campaigns, including data reduction.
  • Coordinate thermal interfaces with mechanical, electrical, and systems teams.
  • Mentor interns and junior engineers through model reviews.

Required Qualifications

  • 5+ years (BS+5 or MS+3) in spacecraft or aerospace thermal engineering.
  • Independent user of a thermal analysis package (Thermal Desktop or equivalent).
  • Experience with TVAC or other spacecraft thermal testing.
  • Solid grasp of conduction/radiation fundamentals and hand calcs.
  • B.S. or higher in Mechanical, Aerospace, Physics, or a related field.

Nice-to-have

  • Scripting in Python or Matlab.
  • Mechanical CAD (SolidWorks preferred).
  • Experience with IR-imaging systems or spacecraft payloads.

Compensation

Salary range: $153,000-$172,000, plus equity grant and comprehensive benefits including medical, dental, vision insurance, 401k, disability and life insurance, three weeks paid vacation, 12 paid holidays, unlimited sick time, and paid parental leave.

ITAR/Export Control

This position requires access to export controlled information. Applicant must be a U.S. person (U.S. citizen, national, lawful permanent resident, refugee, or asylee) or eligible to access export controlled information without authorization, or eligible and reasonably likely to obtain required export authorization from the applicable U.S. government agency.