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Sr. Spacecraft Thermal Engineer

Observable Space - Los Angeles, CA, United States - Hybrid - posted 2026-09-10

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Observable Space is a vertically integrated space technology company building precision optics platforms for Earth observation and in-space applications. The company serves NASA, JPL, SpaceX, Boeing, RTX, the US Space Force, and leading research institutions, combining precision opto-mechanical hardware, embedded compute, cloud orchestration, and developer-friendly APIs. You will design and develop thermal control systems for telescope platforms and spacecraft, working with a multidisciplinary team of optical, electrical, mechanical, and software engineers. Key responsibilities include: - Design and optimize thermal control systems for spacecraft and telescope platforms, including radiators, heaters, insulation, thermal straps, and enclosures - Develop thermal models and perform detailed thermal analysis (steady-state and transient) across operational environments - Perform STOP analysis (Structural, Thermal, Optical Performance) to verify system-level thermal stability and optical performance impact - Conduct FEA simulations for thermal, structural, and environmental conditions - Collaborate with optics, mechanical, and electrical teams to ensure proper thermal integration with imaging, tracking, and sensing subsystems - Define thermal requirements, margins, and verification strategies for system and subsystem performance - Support environmental testing, including thermal vacuum (TVAC), thermal cycling, and validation of thermal models - Support the full product lifecycle from concept design and prototyping to testing and production - Participate in design reviews (PDR, CDR) and internal documentation - Provide engineering support during fabrication, integration, QC, and system validation The role offers a hybrid work environment with a requirement of minimum 3 days per week in the Los Angeles office. Observable Space is backed by top-tier investors including Lux Capital, Upfront Ventures, RTX Ventures, Detroit Venture Partners, and Embedded Ventures. REQUIREMENTS: - Bachelor's degree in Mechanical Engineering, Aerospace Engineering, or equivalent - 5+ years of experience in thermal engineering for aerospace or high-performance systems - Strong understanding of heat transfer fundamentals (conduction, convection, radiation) - Experience with thermal analysis tools (e.g., Thermal Desktop, SINDA/FLUINT, ANSYS, or similar) - Experience developing and validating thermal models for complex systems - Effective communication and collaboration skills - Demonstrated passion for aerospace or observational technologies PREFERRED QUALIFICATIONS: - Experience with spacecraft thermal control systems and space environments (LEO, GEO, or deep space) - Understanding of FEA (ANSYS, Nastran, etc.), tolerance analysis, and DFM principles - Experience with thermal vacuum (TVAC) testing, thermal cycling, and model correlation - Grasp of materials, coatings, surface properties, and thermal interface design - Understanding of system engineering workflows, interface control documents, and verification processes - Experience working in fast-paced, early-stage or startup environments - Basic scripting or automation (Python, MATLAB) for thermal modeling or data analysis

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