Senior Thermal Engineer Verified today

Astranis · San Francisco, CA · Mechanical · first seen 2026-09-18

As a Senior Thermal Engineer at Astranis, you will design, evaluate, and test thermal solutions ranging from electronic chips to full spacecraft thermal vacuum tests. You must have a strong problem-solving background and hands-on testing skills. Experience with spacecraft or printed circuit board thermal mitigation is beneficial but not required.

Role

  • Identify feasible thermal architectures and mature designs through conceptual, preliminary, and detailed design phases using passive and active thermal control techniques.
  • Take charge of design trades that balance performance margins, resource use, risk, cost, and schedule.
  • Perform thermal analysis at varying levels of fidelity on propulsion components, batteries, high-powered electronics, RF components, mechanisms, and printed circuit boards.
  • Design, evaluate, procure, and test thermal solutions such as heaters, heat pipes, thermal interface materials, and surface coatings.
  • Develop processes and procedures for integration and assembly to ensure thermal design intent is met. Collaborate with integration and test teams on thermal hardware installation.
  • Plan and run thermal vacuum testing and verification at component and spacecraft level.
  • Mentor and support junior engineers.
  • Assist in recruiting, interviewing, and hiring additional team members.

Requirements

  • Bachelor of Science degree in engineering or physics
  • 5+ years of experience in a thermal or mechanical role
  • Experience in thermal analysis and thermally-constrained design; computational thermal design experience with finite element methods is highly preferred but not required
  • Proficiency with mechanical CAD
  • Passion and enthusiasm for hardware development, including working in a fast-paced environment with hands-on design and development

Bonus Experience

  • Thermal Desktop
  • ANSYS Mechanical or ANSYS IcePak
  • Electronics packaging and printed circuit board design
  • Building and operating high vacuum systems
  • Designing for vacuum environments or environments with large temperature swings

Compensation and Benefits

Base salary: $145,000 to $235,000 USD. Compensation includes equity via incentive stock options, company-subsidized healthcare, disability and life insurance, 401(k) retirement planning, flexible PTO, and on-site catered meals.

Requirements

U.S. citizenship, lawful permanent residency, or refugee/asylee status required to comply with U.S. Government space technology export regulations.