Thermal Engineer

San Francisco, CA
(Note: This is due to U.S. export regulations, and we are unable to make exceptions.)

Four billion people do not have access to the internet. Astranis is going to change that. We are building the next generation of smaller, lower-cost telecommunications satellites to bring the world online. 

Come work with incredibly smart people who have flown things in space before. No prior space experience needed, you just need to enjoy getting your hands dirty with real hardware and be okay with struggling to do things that seem impossibly hard.

We’re a well-funded team of over 100 world-class engineers that move fast. We raised our Series B ($90M) from Andreessen Horowitz and Venrock, launched our first satellite in 2018, secured our first major customer deal in 2019, and we’ll triple the satellite internet capacity of Alaska in 2021. 

Our mission and our products are meant to connect the world and everyone in it, regardless of gender, race, creed, or any other distinction. We believe in a diverse and inclusive workplace, and we encourage all people to join our team and bring their unique perspective to help make us stronger.

Note: This posting is for applicants who are primarily interested in design, analysis, and development of thermal solutions for spacecraft, including the primary structures, thermal coatings, and electronics enclosures. However, we encourage everyone to broaden their skillsets and the nature of the small company work means that you'd be involved on a number of different projects.


    • Develop thermal loading, nominal and off-nominal analysis cases and component temperature limits for Astranis spacecraft in conjunction with the rest of the team
    • Build complex submodels as necessary and simplified representations for the top level thermal model
    • Design, analyze, procure and test thermal solutions such as strapping and heat pipes, both as samples and as part of primary structure
    • Develop processes and procedures for integration and assembly which ensure thermal design intent is met
    • Plan and run thermal vacuum testing and verification for the spacecraft


    • Bachelor of Science degree in engineering
    • Experience in thermal analysis and thermally-constrained design; computational thermal design experience (finite methods) is not required but highly preferred
    • Proficiency with mechanical CAD
    • A passion for hardware development, including working in a fast-paced environment and hands-on design and development
    • Don't meet them all? Not a problem. Please apply even if you do not meet all these criteria.


    • Experience with Thermal Desktop
    • Experience with FEMAP/Nastran
    • Experience with composite structures
    • Experience in designing in a vacuum environment with large temperature swings