WI · On-site
$75 - $100/hr
ABOUT FIREFLY AEROSPACE As an end-to-end responsive space company, Firefly Aerospace is on a ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
Firefly Aerospace
60 Firefly Aerospace Thermal Engineer Jobs Hiring Near You
WI · On-site
$75 - $100/hr
ABOUT FIREFLY AEROSPACE As an end-to-end responsive space company, Firefly Aerospace is on a ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
Thermal Engineer II
Cedar Park, TX · On-site
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
Thermal Engineer II
Cedar Park, TX · On-site
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
Thermal Engineer II
Cedar Park, TX · On-site
$95 - $140/hr
Firefly Aerospace is a space and defense technology company on a mission to reliably and repeatedly ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
Thermal Engineer II
Cedar Park, TX · On-site
$95 - $140/hr
Firefly Aerospace is a space and defense technology company on a mission to reliably and repeatedly ... SUMMARY Firefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Senior Thermal Engineers provide technical leadership for spacecraft thermal ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Senior Thermal Engineers provide technical leadership for spacecraft thermal ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Senior Thermal Engineers provide technical leadership for spacecraft thermal ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Senior Thermal Engineers provide technical leadership for spacecraft thermal ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Senior Thermal Engineers provide technical leadership for spacecraft thermal ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... SUMMARY Firefly Senior Thermal Engineers provide technical leadership for spacecraft thermal ...
WI · On-site
$100 - $130/hr
ABOUT FIREFLY AEROSPACE As an end-to-end responsive space company, Firefly Aerospace is on a ... SUMMARY Firefly Senior Thermal Engineers provide technical leadership for spacecraft thermal ...
WI · On-site
$100 - $130/hr
ABOUT FIREFLY AEROSPACE As an end-to-end responsive space company, Firefly Aerospace is on a ... SUMMARY Firefly Senior Thermal Engineers provide technical leadership for spacecraft thermal ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... thermal control systems. * Experience with vehicle level static and vibroacoustic testing.
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... thermal control systems. * Experience with vehicle level static and vibroacoustic testing.
WI · On-site
$80 - $100/hr
Careers At Firefly Aerospace Share with friends or Subscribe! Current job opportunities are posted ... Experience with environmental testing (thermal, vibrational, shock, etc) Firefly offers outstanding ...
WI · On-site
$80 - $100/hr
Careers At Firefly Aerospace Share with friends or Subscribe! Current job opportunities are posted ... Experience with environmental testing (thermal, vibrational, shock, etc) Firefly offers outstanding ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... Execute detailed designs using CAD and analytical tools, and coordinate closely with thermal ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... Execute detailed designs using CAD and analytical tools, and coordinate closely with thermal ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... Execute detailed designs using CAD and analytical tools, and coordinate closely with thermal ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... Execute detailed designs using CAD and analytical tools, and coordinate closely with thermal ...
WI · On-site
$85 - $120/hr
Careers At Firefly Aerospace Share with friends or Subscribe! Current job opportunities are posted ... Experience with environmental testing (thermal, vibrational, shock, etc) Firefly offers outstanding ...
WI · On-site
$85 - $120/hr
Careers At Firefly Aerospace Share with friends or Subscribe! Current job opportunities are posted ... Experience with environmental testing (thermal, vibrational, shock, etc) Firefly offers outstanding ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... Perform and/or guide detailed analysis including structural margins, thermal effects, and tolerance ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... Perform and/or guide detailed analysis including structural margins, thermal effects, and tolerance ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... Perform and/or guide detailed analysis including structural margins, thermal effects, and tolerance ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... Perform and/or guide detailed analysis including structural margins, thermal effects, and tolerance ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... Perform and/or guide detailed analysis including structural margins, thermal effects, and tolerance ...
ABOUT FIREFLY AEROSPACE Firefly Aerospace is a space and defense technology company on a mission to ... Perform and/or guide detailed analysis including structural margins, thermal effects, and tolerance ...
Firefly Aerospace Jobs Information
Do workers at Firefly Aerospace get paid breaks?
Yes. Most people get paid breaks.
75% of people say they get paid breaks.
Based on data from 8 people who took the Breakroom Quiz between December 2024 and March 2026.
75% of people say they get paid breaks.
Based on data from 8 people who took the Breakroom Quiz between December 2024 and March 2026.
Does Firefly Aerospace pay people when they’re sick?
Yes. Most people get paid when they’re sick.
78% of people say they would get paid if they were sick but scheduled to work.
Based on data from 9 people who took the Breakroom Quiz between February 2025 and August 2026.
78% of people say they would get paid if they were sick but scheduled to work.
Based on data from 9 people who took the Breakroom Quiz between February 2025 and August 2026.
Is the health insurance from Firefly Aerospace affordable enough for their workers?
Most people say the health insurance costs are okay.
100% of people say the health insurance costs are okay
Based on data from 6 people who took the Breakroom Quiz between March 2025 and August 2026.
100% of people say the health insurance costs are okay
Based on data from 6 people who took the Breakroom Quiz between March 2025 and August 2026.
Do workers at Firefly Aerospace worry about hours?
Most people don’t worry about getting enough hours.
86% of people report they don’t worry about getting enough hours.
Based on data from 7 people who took the Breakroom Quiz between December 2024 and August 2026.
86% of people report they don’t worry about getting enough hours.
Based on data from 7 people who took the Breakroom Quiz between December 2024 and August 2026.
Do Firefly Aerospace workers get to choose the shifts they work?
Some people don’t get to choose which shifts they work.
60% report that they don’t have enough control over which shifts they work.
Based on data from 5 people who took the Breakroom Quiz between December 2024 and August 2026.
60% report that they don’t have enough control over which shifts they work.
Based on data from 5 people who took the Breakroom Quiz between December 2024 and August 2026.
How easy is it to get time off at Firefly Aerospace?
Most people find it easy to get time off.
80% of people report it’s easy to get time off.
Based on data from 10 people who took the Breakroom Quiz between January 2025 and August 2026.
80% of people report it’s easy to get time off.
Based on data from 10 people who took the Breakroom Quiz between January 2025 and August 2026.
Do Firefly Aerospace managers change schedules at the last minute?
Most managers don’t change people’s schedules at the last minute.
83% of people say their manager doesn’t change their shift schedule at the last minute.
Based on data from 6 people who took the Breakroom Quiz between December 2024 and August 2026.
83% of people say their manager doesn’t change their shift schedule at the last minute.
Based on data from 6 people who took the Breakroom Quiz between December 2024 and August 2026.
Do jobs at Firefly Aerospace spill into time workers aren’t paid for?
Rarely. The job doesn't usually spill into unpaid time.
33% of people report that their job takes up time that they don’t get paid for.
Based on data from 6 people who took the Breakroom Quiz between December 2024 and August 2026.
33% of people report that their job takes up time that they don’t get paid for.
Based on data from 6 people who took the Breakroom Quiz between December 2024 and August 2026.
How easy is it to take sick days at Firefly Aerospace?
Most people find it easy to take sick days.
91% of people report that it’s easy to take time off if they are sick.
Based on data from 11 people who took the Breakroom Quiz between December 2024 and August 2026.
91% of people report that it’s easy to take time off if they are sick.
Based on data from 11 people who took the Breakroom Quiz between December 2024 and August 2026.
Do people at Firefly Aerospace feel treated with respect by their managers?
Most people feel treated with respect by their managers.
80% of people say they’re treated with respect by their managers.
Based on data from 10 people who took the Breakroom Quiz between December 2024 and March 2026.
80% of people say they’re treated with respect by their managers.
Based on data from 10 people who took the Breakroom Quiz between December 2024 and March 2026.
Do people at Firefly Aerospace get to take their breaks without interruption?
Most people get breaks without interruption.
78% of people report that they get to take their breaks without interruption.
Based on data from 9 people who took the Breakroom Quiz between December 2024 and August 2026.
78% of people report that they get to take their breaks without interruption.
Based on data from 9 people who took the Breakroom Quiz between December 2024 and August 2026.
Is it stressful to work at Firefly Aerospace?
Most people feel stressed here.
100% of people say they often feel stressed at work.
Based on data from 8 people who took the Breakroom Quiz between February 2025 and August 2026.
100% of people say they often feel stressed at work.
Based on data from 8 people who took the Breakroom Quiz between February 2025 and August 2026.
Do people at Firefly Aerospace enjoy their jobs?
Most people enjoy their job.
90% of people report they enjoy their job.
Based on data from 10 people who took the Breakroom Quiz between December 2024 and March 2026.
90% of people report they enjoy their job.
Based on data from 10 people who took the Breakroom Quiz between December 2024 and March 2026.
Do people at Firefly Aerospace recommend working with their team?
Most people recommend working with their team.
82% of people report that they would recommend working with their immediate team to a friend.
Based on data from 11 people who took the Breakroom Quiz between December 2024 and August 2026.
82% of people report that they would recommend working with their immediate team to a friend.
Based on data from 11 people who took the Breakroom Quiz between December 2024 and August 2026.
Do people get enough training when they start at Firefly Aerospace?
Some people didn’t get enough training when they started.
50% of people report they didn’t get enough training when they started working here.
Based on data from 10 people who took the Breakroom Quiz between December 2024 and August 2026.
50% of people report they didn’t get enough training when they started working here.
Based on data from 10 people who took the Breakroom Quiz between December 2024 and August 2026.
Do people get support to advance at Firefly Aerospace?
Most people are given support to advance their career here.
In the last year, 70% of people report being given support to advance their career here.
Based on data from 10 people who took the Breakroom Quiz between December 2024 and August 2026.
In the last year, 70% of people report being given support to advance their career here.
Based on data from 10 people who took the Breakroom Quiz between December 2024 and August 2026.
Do people think Firefly Aerospace’s headquarters understands what’s happening where they work?
Some people think headquarters doesn’t understand what’s happening where they work.
64% of people think that this employer’s headquarters or owners don’t have a good understanding of what’s really happening where they work.
Based on data from 11 people who took the Breakroom Quiz between December 2024 and August 2026.
64% of people think that this employer’s headquarters or owners don’t have a good understanding of what’s really happening where they work.
Based on data from 11 people who took the Breakroom Quiz between December 2024 and August 2026.
Do workers feel well informed about how Firefly Aerospace is doing?
Only some people feel well informed about how the company is doing.
36% of people feel that they aren’t kept well informed about how the company is doing as a whole.
Based on data from 11 people who took the Breakroom Quiz between December 2024 and August 2026.
36% of people feel that they aren’t kept well informed about how the company is doing as a whole.
Based on data from 11 people who took the Breakroom Quiz between December 2024 and August 2026.
What other companies are hiring for Thermal Engineer jobs?
What are the most popular jobs at Firefly Aerospace?
What are the most popular categories at Firefly Aerospace?
Firefly Aerospace rating
6.9
Based on 11 frontline employees who took The Breakroom Quiz
64th of 72 rated aerospace companies
Job description
Career Opportunities with Firefly Aerospace
Come be a part of the 21 st Century Space Race!
Careers At Firefly Aerospace
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ABOUT FIREFLY AEROSPACEAs an end-to-end responsive space company, Firefly Aerospace is on a mission to enable our world to launch, land, and operate in space – anywhere, anytime. Our small- to medium-lift launch vehicles, lunar landers, and orbital vehicles allow us to service the entire lifecycle of government and commercial missions from low Earth orbit to the Moon and beyond. We utilize carbon composite structures, patented propulsion technologies, and common components across our vehicles to iterate quickly, improve reliability, and deliver payloads at a lower cost.
SUMMARYFirefly Thermal Engineers apply advanced simulation and heat transfer expertise to solve complex spacecraft thermal challenges from concept development through flight operations. Engineers in this role independently own subsystem thermal analyses, develop validated thermal models, and influence engineering decisions through high‑quality analytical work.
Successful candidates are expected to drive thermal analyses from problem definition through documentation while collaborating across multiple engineering disciplines.
RESPONSIBILITIES- Independently develop and maintain subsystem and vehicle‑level spacecraft thermal models.
- Own thermal analyses from model setup through documentation with minimal oversight.
- Execute thermal trade studies supporting design, integration, testing, and mission operations.
- Develop thermal control solutions including MLI, radiator sizing, heater strategies, coatings, and other passive and active thermal control technologies.
- Coordinate thermal environments with internal engineering teams and external customers.
- Organize and support testing, including vehicle‑level thermal vacuum testing.
- Support the thermal control subsystem on console during launch operations.
- Correlate analytical models using thermal vacuum and environmental test data.
- Break large analytical efforts into actionable tasks while managing priorities across multiple programs.
- Document analysis results for internal and customer design reviews.
- Mentor entry‑level engineers by reviewing models, analyses, and reports.
- Identify model sensitivities, uncertainties, and technical risks while recommending mitigation strategies.
- Contribute to process improvements, automation, and modeling best practices.
- B.S. in Aerospace Engineering, Mechanical Engineering, Physics, or related field
- Approximately 3–8 years of spacecraft or aerospace thermal analysis experience
- Strong experience with Thermal Desktop and related thermal analysis software
- Strong understanding of spacecraft thermal control systems
- Experience correlating analytical models with test data
- Working knowledge of Python and MATLAB
- Excellent technical communication skills
- Demonstrated ability to independently execute complex engineering analyses
- Experience with ANSYS SpaceClaim, NX, or Simcenter
- Experience developing thermal test plans and coordinating thermal vacuum tests
- Familiarity with NASA spacecraft thermal standards
- Experience supporting spacecraft through integration and environmental testing
What Firefly Aerospace employees say
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