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About the Role

Analyze, design, and validate thermal control systems for spacecraft, ensuring optimal performance across various orbital regimes and mission phases. Contribute to the fast-paced design, build, and testing of Rendezvous and Proximity Operations (RPO) capable spacecraft.

Responsibilities

• Develop, run, and maintain thermal models (GMM/TMM) of spacecraft, subsystems, and equipment.
• Define hot, cold, and edge cases that drive the thermal design.
• Correlate thermal models against test and flight data.
• Support the design and sizing of active and passive thermal control solutions.
• Translate analysis into practical hardware recommendations.
• Execute hand calculations, spreadsheet models, and Python first-order analysis.
• Conduct trade-off studies on thermal architecture, balancing performance against mass, power, cost, manufacturability, operational constraints, and schedule.
• Present key assumptions, problems, results, and conclusions to guide design decisions.
• Support and execute thermal testing of spacecraft and equipment.
• Produce clear thermal analysis reports, design notes, verification evidence, and review material.
• Support internal and external technical reviews.
• Develop and maintain internal thermal analysis tools, material property databases, model templates, and post-processing workflows.
• Guide the tools and processes the team uses to improve speed, consistency, and traceability.

Requirements

• Bachelor's or higher in Mechanical, Aerospace, Space Systems, or related engineering discipline.
• 2+ years delivering thermal analysis and design for space systems.
• Hands-on experience developing and running thermal models using at least one industry-standard tool (e.g., Thermal Desktop, Systema/Thermica, ESATAN-TMS, NX Space Systems Thermal).
• Understanding of the space environment and its drivers (beta angle, eclipse, seasonal variation, spacecraft attitude).
• Ability to perform first-principles calculations and sanity checks.
• Strong systems-thinking mindset with the ability to interface across disciplines.
• Working knowledge of passive and active thermal control hardware, including selection criteria, sizing, and interface considerations.

Skills

• Thermal Analysis
• Thermal Design
• Thermal Modeling (GMM/TMM)
• Thermal Desktop
• Systema/Thermica
• ESATAN-TMS
• NX Space Systems Thermal
• First Principles Calculations
• Python
• Trade Studies
• Thermal Testing
• Documentation
• Systems Engineering
• Space Environment Understanding
• Passive Thermal Control
• Active Thermal Control

Location

• Remote

Work Type

• Full-time

Experience Level

• Staff

Education Level

• Bachelor's Degree

Salary/Compensations

• Competitive salary – Fair pay for hard work. Commensurate with experience and the impact you'll have.

Benefits

• Meaningful equity (ESOP)
• Annual leave
• Personal/sick days
• Public holidays
• Freedom to build, decide, and move without waiting for permission.

About the Company

• Our mission is to safeguard critical space infrastructure by providing the first integrated security platform to see threats, decide fast and respond at scale.
• We are developing systems that are produced at scale and operated with human-on-the-loop autonomy to drastically reduce the cost and complexity of orbital operations.
• We are developing the vehicles and software to protect space assets, working with commercial operators and government agencies across allied nations.
• Our approach is grounded in economics as much as engineering.
• The Optimus Viper Rapid Response Vehicle delivers genuine mission capability at a fraction of conventional spacecraft cost, designed for high-volume production and rapid deployment.
• Solstice OS, our AI-driven command and control platform, fuses space domain awareness data and automates mission planning and vehicle coordination.
• We are building the technology to make space assets inspectable, monitorable, and protectable in orbit.
• We're a start-up — things move fast, resources are lean, and we're building as we go.
• We offer opportunity to learn at speed, grow with the company, and leave your fingerprints on something that's never been done before.
• Engineers, innovators, and problem-solvers join forces to push the limits of what's possible.
• We build technology designed to protect and power humanity's future in space.
• We are builders first.
• We approach every challenge through a cycle of design, build, test, and refine.
• We challenge assumptions to make sure we're solving the right problems.
• We strengthen our solutions through collaboration and feedback.
• We use process where it adds value and set it aside where it slows us down.
• We meet firsts with curiosity and courage.
• We win as one team.