Test Engineer IV – Propulsion

Firefly Aerospace

Propulsion Test Engineer leading hotfire tests for the Spectre propulsion engine at Firefly Aerospace. Collaborating with engineering teams to optimize liquid propulsion systems for lunar missions.

Posted 5/27/2026full-timeBriggs • Texas • 🇺🇸 United StatesMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

Python

About the role

Key responsibilities & impact

Lead the integration, instrumentation, and execution of hotfire tests for the Spectre propulsion engine and related liquid propulsion systems
Develop comprehensive test plans, procedures, and operational sequences for complex propulsion system testing
Serve as test conductor for critical test operations, managing console operations, data acquisition systems, and test team communications
Perform and oversee hands-on setup, checkout, and operation of ground support equipment including propellant transfer systems, pressurization systems, and safety systems
Execute propellant loading, engine conditioning, ignition sequences, and safing operations in accordance with approved procedures
Analyze test data in real-time and post-test to verify system performance, identify anomalies, and validate test objectives using tools such as Python, LabView, or similar
Lead anomaly investigations, root cause analysis, and implementation of corrective actions
Collaborate with propulsion design engineers, systems engineers, and technicians to resolve technical issues and optimize test operations
Support design reviews and provide test operations input to hardware and facility design efforts
Develop and improve test infrastructure, instrumentation strategies, and operational capabilities
Ensure all test operations comply with safety protocols, hazard controls, and regulatory requirements for hypergolic propellant operations
Participate in hazard analyses, safety reviews, and operational readiness reviews
Maintain accurate test documentation, configuration control, and test records
Support development and review of facility procedures, work instructions, and safety documentation
Support test schedule development and resource planning for propulsion test campaigns
Provide technical mentorship and training to junior test engineers and technicians

Requirements

What you’ll need

BS in Mechanical Engineering, Aerospace Engineering, Chemical Engineering, or related discipline
Minimum 3 plus years of hands-on experience with liquid rocket propulsion test operations, including test planning, execution, and data analysis
Demonstrated experience leading or conducting liquid propulsion hotfire tests (engine, thruster, or integrated vehicle)
Strong understanding of liquid propulsion systems including propellant feed systems, pressurization systems, ignition systems, and propellant chemistry
Proficiency with fluid systems including valves, regulators, pressure vessels, propellant transfer systems, and leak detection methods
Experience with data acquisition systems, instrumentation (pressure, temperature, flow, thrust), and sensor calibration
Ability to read and interpret P&IDs, control schematics, and engineering drawings for complex fluid systems
Demonstrated experience with test data analysis and reporting
Strong problem-solving skills and ability to troubleshoot complex systems under pressure
Excellent written and verbal communication skills.

Benefits

Comp & perks

generous health, dental and vision plans with low plan deductibles
parental leave
educational reimbursement
short term disability
flexible PTO options

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

liquid rocket propulsiontest planningdata analysisanomaly investigationsroot cause analysispropellant feed systemspressurization systemsignition systemsfluid systemssensor calibration

Soft Skills

problem-solvingtroubleshootingcommunicationmentorshipteam collaborationleadershiporganizational skillstechnical traininganalytical skillsattention to detail

Certifications

BS in Mechanical EngineeringBS in Aerospace EngineeringBS in Chemical Engineering