Senior Thermal Engineer Verified today

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

The Role

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 as well as hands-on testing skills.

Your responsibilities include:

  • Identify feasible thermal architectures and mature designs through conceptual, preliminary, and detailed design phases using practical passive and active thermal control techniques.
  • Take charge of design trades that successfully balance performance margins, resource use, risk, cost, and schedule.
  • Perform thermal analysis to varying degrees of fidelity on propulsion components, batteries, high powered electronics, RF components, mechanisms, and printed circuit boards (PCBs).
  • 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 which ensure thermal design intent is met. Collaborate with the integration and test team in the installation of thermal hardware as needed.
  • Plan and run thermal vacuum testing and verification at the component and spacecraft level.
  • Mentor and support junior engineers.
  • Assist in recruiting, interviewing, and hiring additional teammates.

Requirements

  • Bachelor of Science degree in engineering or physics
  • 8+ years of experience in a thermal/mechanical role
  • Experience in thermal analysis and thermally-constrained design
  • Proficiency with mechanical CAD
  • Passion and enthusiasm for hardware development, including working in a fast-paced environment and hands-on design and development

Preferred Experience

  • Computational thermal design experience (finite element methods)
  • Experience with Thermal Desktop
  • Experience with ANSYS Mechanical or ANSYS IcePak
  • Experience with Electronics Packaging and Printed Circuit Board (PCB) design
  • Experience building and operating high vacuum systems
  • Experience designing for a vacuum environment or environments with large temperature swings

Compensation and Benefits

Base salary: $145,000-$235,000 USD.

Compensation package includes equity via incentive stock options, company-subsidized healthcare, disability and life insurance, 401(k) retirement planning, flexible PTO, and free 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.