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Thermal Engineer

Momentus - San Jose, CA, United States

Posted May 15, 2026

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About this role

Thermal Engineer San Jose, CA, United States OUR COMPANY As an early mover in the in-space transportation and infrastructure services, Momentus is at the forefront of the commercialization of space. With an experienced team of aerospace, propulsion, and robotics engineers, Momentus has developed a cost-effective and energy-efficient in-space transport system. OUR PEOPLE Daring problems require daring solutions. We boldly charge into uncharted territory knowing that no matter the outcome we will benefit from the journey and move closer to our goals no matter what. Our teams know that working at Momentus means more than building innovative technology, it means creating entirely new markets in the space economy. We are level-headed, business-minded strategic thinkers intent on providing immediate value to our customers today while simultaneously preparing for the vast possibilities of the future. If this sounds like you, we should talk. JOB SUMMARY The Senior Thermal Engineer will participate in the thermal design and analysis of flight spacecraft and will follow programs through execution of assembly, integration, and test. The ideal candidate should be accustomed to working in a fast-paced environment and quickly adapting to new challenges. Key Responsibilities: - Thermal design and analysis of spacecraft and spacecraft components - Work with mechanical design engineers to ensure all components are maintained within acceptable temperature limits - Source, spec, and procure thermal hardware - Manage vendor relationships - Work with systems engineering team to run TVAC testing Required Skills and Experience - Demonstrated experience with detailed thermal analysis of spacecraft at the

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