Synced from Greenhouse · Sep 17

Thermal Engineer

AstranisSan FranciscoPosted Sep 17, 2026
Mechanical EngineerSenior
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Mirrored from Astranis's own Greenhouse careers system · refreshed hourly

$145k–$235k
Compensation
84
Other open Astranis roles
Sep 17
Posted
Greenhouse
Applicant system
Job descriptionReq 4004155006

Astranis builds advanced satellites for high orbits, expanding humanity’s reach into the solar system. Today, Astranis satellites provide dedicated, secure networks to highly-sophisticated customers across the globe— large enterprises, sovereign governments, and the US military. With five satellites on orbit and many more set to launch soon, the company is servicing a backlog of more than $1 billion of commercial contracts.

Astranis is the preferred satellite communications partner for buyers with stringent requirements for uptime, data security, network visibility, and customization. Astranis has raised over $750 million from some of the world’s best investors, from Andreessen Horowitz to Blackrock and Fidelity, and employs a team of 450 engineers and entrepreneurs. Astranis designs, builds, and operates its satellites out of its 153,000 sq. ft. headquarters in Northern California, USA.

As an Astranis Senior Thermal Engineer, 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.  Experience with spacecraft or printed circuit board thermal mitigation are benefits but not required.

Role

  • 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 (simplified to detailed) on a variety of different types of hardware such as 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 to our rapidly-growing team.

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; computational thermal design experience (finite methods) is not required but highly preferred
  • Proficiency with mechanical CAD
  • A passion and enthusiasm 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.

Bonus

  • 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
 
What we offer: 
 
All our positions offer a compensation package that includes equity and robust benefits.
 

Base pay is just one component of Astranis’s total rewards package. Your compensation also includes a significant equity package via incentive stock options, high-quality company-subsidized healthcare, disability and life insurance, 401(k) retirement planning, flexible PTO, and free on-site catered meals.

Astranis pay ranges are informed and defined through professional-grade salary surveys and compensation data sources. The actual base salary offered to a successful candidate will additionally be influenced by a variety of factors including experience, credentials & certifications, educational attainment, skill level requirements, and the level and scope of the position.
Base Salary
$145,000$235,000 USD
U.S. Citizenship, Lawful Permanent Residency, or Refugee/Asylee Status Required
(To comply with U.S. Government space technology export regulations, applicant must be a U.S. citizen, lawful permanent resident of the United States, or other protected individual as defined by 8 U.S.C. 1324b(a)(3))
 
Our mission and products are built for everyone, regardless of gender, race, creed, or background. We believe in a diverse and inclusive workplace, and we invite all people to join our team and bring their unique perspectives to make us stronger.
 

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What applying to Astranis usually looks like

Based on publicly available information, candidates applying through greenhouse can typically expect an initial online application with resume and possibly a cover letter, followed by a recruiter screen if there is interest. The process may include multiple stages such as a hiring manager conversation, technical or role-specific assessments, and panel interviews with team members, particularly for engineering, manufacturing, or technical roles common at a company like Astranis. Response times vary and applicants should not assume a fixed schedule. Greenhouse-based processes commonly allow candidates to track application status through an online portal, and communication is often handled via email. Preparation typically involves reviewing the job description closely, since greenhouse listings tend to detail required qualifications, and being ready to discuss relevant experience, technical skills, and general fit for the team and mission.

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