Firefly Space Systems

Spacecraft Thermal Engineer III

Firefly Space Systems$90K — $130K *
Aerospace & Defense
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • B.S. in Aerospace Engineering, Mechanical Engineering, Physics, or related field
  • 8-15+ years of spacecraft thermal analysis experience
  • Expert knowledge of spacecraft heat transfer and thermal control systems
  • Extensive experience with Thermal Desktop and other thermal analysis software
  • Demonstrated success leading thermal analyses through design, testing, and flight
  • Strong programming skills in Python, MATLAB, or similar languages

Responsibilities

  • Lead thermal analyses to inform major spacecraft design decisions across multiple programs.
  • Own and maintain integrated spacecraft thermal models architecture and validation.
  • Develop innovative workflows and automation to enhance team efficiency.
  • Conduct thermal trade studies on mission environments and advanced thermal control technologies.
  • Define analysis strategies for all phases from conceptual design to flight.
  • Organize and oversee thermal vacuum testing at the vehicle level.
  • Serve as the thermal control subsystem contact during launch operations.

Benefits

  • Comprehensive health, dental, and vision insurance
  • 401(k) plan with company match
  • Flexible work hours and remote work options
  • Professional development and mentorship opportunities
  • Generous paid time off and holidays
Full Job Description
SUMMARY

Firefly Senior Thermal Engineers provide technical leadership for spacecraft thermal analysis across multiple vehicle programs. They develop analytical approaches for complex thermal challenges, establish modeling strategies, mentor engineers across the organization, and influence major program decisions throughout vehicle development.

This role requires deep expertise in spacecraft thermal engineering, strong technical judgment, and the ability to independently lead multidisciplinary efforts involving analysis, testing, and vehicle design.

RESPONSIBILITIES
  • Lead thermal analyses that drive major vehicle design decisions across multiple spacecraft programs.
  • Own the architecture, validation, and long-term maintenance of integrated spacecraft thermal models.
  • Develop innovative analytical methods, workflows, and automation that improve team capability and efficiency.
  • Lead thermal trade studies involving mission environments, propulsion effects, lunar surface interactions, cryogenics, and advanced thermal control technologies.
  • Define thermal analysis strategies supporting conceptual design through flight.
  • Organize and lead testing, including vehicle-level thermal vacuum testing.
  • Serve as the point of contact for the thermal control subsystem during launch operations.
  • Lead model validation efforts using thermal vacuum, qualification, acceptance, and flight data.
  • Mentor and technically review work performed by thermal engineers across multiple experience levels.
  • Represent Thermal Engineering during customer reviews and major program design reviews.
  • Provide technical leadership during anomaly investigations and rapid-response engineering efforts.
  • Influence organizational best practices, analytical standards, and long-term capability development.
  • Support hiring, technical interviews, and development of the thermal engineering team.


QUALIFICATIONS

Required
  • B.S. in Aerospace Engineering, Mechanical Engineering, Physics, or related field
  • Approximately 8-15+ years of spacecraft thermal analysis experience
  • Expert knowledge of spacecraft heat transfer and thermal control systems
  • Extensive experience with Thermal Desktop and industry-standard thermal analysis software
  • Demonstrated success leading thermal analyses through design, testing, and flight
  • Experience with instrumentation and testing thermal hardware
  • Experience correlating analytical models using environmental and flight data
  • Strong programming skills using Python, MATLAB, or similar languages
  • Excellent technical leadership and communication skills
  • Proven ability to independently scope, execute, defend, and communicate complex analyses

Desired
  • M.S. or Ph.D.
  • Experience supporting NASA, DoD, or commercial spacecraft programs
  • Experience developing new thermal analysis methodologies or software automation
  • Familiarity with thermal standards (e.g., GSFC-STD-7001B, SMC-S-016, RCC-319, Spacecraft Payload requirements)
  • Experience organizing and executing thermal vacuum tests
  • Experience with advanced spacecraft thermal control technologies, lunar environments, plume heating, and mission-specific thermal phenomena

About Firefly Space Systems

Firefly Space Systems was an American aerospace manufacturer based in Cedar Park, Texas. The company was founded in 2013 with the goal of developing low-cost launch vehicles for the small satellite industry. Firefly's Alpha rocket was designed to carry payloads of up to 1,000 kg to low Earth orbit. The company was acquired by EOS Launcher in 2017 and is now known as Firefly Aerospace. Firefly Aerospace is continuing the development of the Alpha rocket and is also working on a larger rocket called Beta, which is designed to carry payloads of up to 8,000 kg to low Earth orbit. Firefly Aerospace is committed to providing affordable access to space for small satellite operators.
Learn more about Firefly Space Systems
Industry
Founded
2013

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