Senior Thermal Engineer – Constellations

At Blue Origin, we envision millions of people living and working in space for the benefit of Earth.
We’re working to develop reusable, safe, and low-cost space vehicles and systems within a culture of safety, collaboration, and inclusion.
Join our team of problem solvers as we add new chapters to the history of spaceflight!
The role is part of the In-Space Systems business unit, which is focused on addressing two of the most compelling challenges in spaceflight today: space infrastructure and increasing mobility on-orbit.
This role is part of the Blue National Security business unit, which is focused on delivering advanced space-based capabilities in support of national security, civil, and commercial missions. Within the Advanced Systems organization, the multi-disciplinary Future Concepts & Capabilities team operates at the forefront of systems engineering, formulation, and architecture, developing next-generation space systems that address the most demanding and consequential challenges in the space domain.
We are seeking a Senior Thermal Engineer to lead the thermal design and analysis for both satellite payloads and integrated in-space constellation solutions. This role is central to ensuring reliable performance of a diverse array of high-power payload systems operating in LEO and other orbital regimes. The ideal candidate brings deep expertise in thermal management of space-qualified hardware, RF / Opto-electrical components, radar systems, and/or specialized payload types, along with the ability to drive cross-disciplinary design integration across payload, mechanical, avionics, and power subsystems.
If you're looking for novel challenges and rewarding work, come join a team pushing the boundaries of space system design to solve the defense and civil domains' toughest problems!

• Location:
  
  This role can be based at any of the following Blue Origin locations:
  Denver, CO;
  Los Angeles, CA;
  Space Coast, FL;
  Reston, VA;
  Huntsville, AL; or Kent, WA (Seattle area).
• Relocation:
  Relocation assistance is available for candidates relocating to one of the primary Blue Origin office locations.
• Travel:
  Up to 25% travel may be required depending on work location and program needs.

• Lead thermal design & analysis for satellite-based, high-power payloads and associated power electronics.
• Develop detailed thermal models using tools such as Thermal Desktop, SINDA/FLUINT, or equivalent, covering conduction, radiation, and convection regimes as appropriate.
• Define and manage thermal interfaces across payload subsystems, including radiators, heat pipes, loop heat pipes, cold plates, and structural elements.
• Perform transient and steady-state thermal analyses to validate performance under mission profiles, including peak duty cycles, eclipse transitions, and worst-case environmental conditions.
• Develop thermal architecture for common bus/payload configurations reused across a production block, including tailoring for orbit plane, beta angle range, and payload variant.
• Select and defend the appropriate thermal qualification, margin, and acceptance approach (e.g., protoflight, workmanship-only TVAC on subsequent units, thermal cycling screening, lot acceptance sampling) based on build rate, mission class, and design life; tailor requirements per SMC-S-016 / MIL-STD-1540 as applicable.
• Define thermal model correlation strategy under limited test data, extending correlated models across the rest of a production block.
• Address LEO thermal cycling fatigue over high cycle counts (~5,000+ eclipse cycles/year) on joints, solder, TIMs, and coatings across design life.
• Drive design-for-manufacturability of thermal hardware at rate (e.g., MLI touch labor, coating…