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Propulsion Test Engineer

Hermeus
Jacksonville, FL Full Time
POSTED ON 12/29/2025
AVAILABLE BEFORE 1/29/2026

Hermeus is a venture capital-backed aerospace and defense technology company. The business is focused on building high-speed products that sustainably deliver asymmetric advantage to the Department of Defense and allied partners. Utilizing an iterative development approach to aircraft, Hermeus’ high-Mach and hypersonic aircraft aim to deliver capabilities at a pace not seen in the U.S. since the 1950s.


The Hermeus Test discipline owns the cradle to grave testing of the fastest unmanned reusable air breathing aircraft on the planet. These are extraordinary vehicles, and we're seeking extraordinary Test Engineers who can drive, thrive, and survive in a Mach 5 environment. 

 

At Hermeus, we are constantly iterating and integrating. We test early and often to minimize technical and program risk. We build the test infrastructure that supports our full range of test programs spanning development, operational, and certification testing. 

   

Hermeus is seeking a Propulsion Test Engineer to join our growing team at our newest facility in Florida. As a Propulsion Test Engineer, you will be responsible for the development, maintenance, and operations of propulsion test stands. This position is an opportunity to collaborate in a highly interdisciplinary environment and own significant contributions for the development of cutting-edgeaerospace technologies. 

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What You’ll Do as a Propulsion Test Engineer
  • Responsible for the development, maintenance, and operations of propulsion test hardware (including facilities and test rigs) 
  • Collaborate with other engineers and technicians over a wide range of disciplines, including propulsion, manufacturing, flight software, GNC, and vehicle systems engineering to develop prototypes and products 


Minimum Requirements
  • Bachelor's degree in mechanical engineering, aerospace engineering, or other related engineering discipline 
  • 3 years of experience designing/operating fluid systems, mechanical systems, and instrumentation 
  • Valid driver’s license and a clean driving record 
  • Available to work overtime and weekends 
  • Strong verbal and written communication skills and ability to read and provide feedback on technical documents 
  • Willing and able to travel to support propulsion/flight test needs 
  • Must be willing and able to obtain and maintain a security clearance 


Preferred Experience
  • Hazardous operations experience 
  • Knowledge of engineering standards and best practices such as ASME B31.3, ASME BPV Code Section VIII 
  • Knowledge of Command and Control systems and hardware 
  • Experience in test, evaluation, and operation of propulsion or turbomachinery systems 
  • Experience with operation and integration of high pressure fluid systems (tubing/piping, instrumentation, controls) 


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$114,750 - $187,450 a year
The salary information provided is a general guideline only. Hermeus takes various factors into account, including, but not limited to, the position's scope and responsibilities, the candidate's professional background, education and training, essential skills, and market and business considerations, when presenting a job offer.
 
Salary is only one part of our total compensation and benefits package. Hermeus offers competitive salary and equity, unlimited PTO policy, paid parental leave, potential for year-end bonuses, and more!
 
100% employer-paid health care
401k & Retirement Plans
Unlimited PTO
Weekly Paid Office Lunches
End of Year Bonuses
Fully stocked breakrooms
Stock Options  
Paid Parental Leave
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Working Conditions and Physical Requirements  

 

Safety is paramount, with stringent protocols ensuring a secure workplace. Collaboration is key, providing opportunities to work closely with a skilled team dedicated to innovation.  

 

This position requires the candidate be able to:  

Work at elevated heights and in confined spaces. 

Lift up to 50 lbs. unassisted. 

Stoop, bend, crawl, and maneuver in tight spaces. 

Work outdoors, in all weather conditions. 

 


U.S. EXPORT CONTROL COMPLIANCE STATUS 

The person hired will have access to information and items subject to U.S. export controls, and therefore, must either be a “U.S. person” as defined by 22 C.F.R. § 120.62 or otherwise eligible for deemed export licensing. US persons include U.S. citizens, U.S. nationals, lawful permanent residents (green card holders), and asylees and refugees with such status granted, not pending. 


EQUAL OPPORTUNITY

Hermeus is an Equal Opportunity Employer. Employment decisions at Hermeus are based solely on merit, competence, and qualifications, without regard to race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability, or any other legally protected status.


Salary : $114,750 - $187,450

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