Hermeus · 5 hours ago
Senior Propulsion Test Engineer
Jacksonville, FL
Full-time
Onsite
Senior Level
$139K/yr - $187K/yr
7+ years expHermeus is a high-speed aircraft manufacturer focused on the rapid design, build, and test of high-Mach and hypersonic aircraft for the national interest. The Senior Propulsion Test Engineer will support the development, integration, and operation of propulsion test systems, focusing on building test capabilities and executing test campaigns for next-generation hypersonic propulsion systems.
AerospaceAir TransportationInfrastructureTravel
No H1B
Security Clearance RequiredU.S. Citizen Only
Responsibilities
Design, develop, and maintain propulsion test stands and associated infrastructure, including mechanical systems, fluid systems, and instrumentation
Execute propulsion and subsystem test operations, including planning, integration, checkouts, and post-test analysis
Support the maintenance of existing test equipment, data acquisition systems, and control hardware
Generate and review detailed test plans, procedures, and safety documentation
Collaborate with propulsion, GNC, software, and vehicle systems engineers to support test article integration and operation
Analyze test data to validate performance, identify anomalies, and recommend design or procedural improvements
Participate in system readiness reviews, safety walkdowns, and test preparation activities
Work with technicians to install hardware, route fluid lines, connect instrumentation, and configure control systems
Support root-cause investigations and corrective actions when test failures or anomalies occur
Drive continuous improvements in test operations, safety, and reliability processes
Qualification
Required
Bachelor's degree in Mechanical, Aerospace, or a related Engineering discipline
7+ years of experience in propulsion test, mechanical systems, or fluid systems design and operation
Hands-on experience working with high-pressure, cryogenic, or high-temperature fluid systems
Proficiency in reading and creating P&IDs and mechanical drawings
Experience with data acquisition and control systems
Strong understanding of system safety practices and operational discipline in hazardous test environments
Excellent analytical, troubleshooting, and problem-solving skills
Effective communicator who can work independently within a fast-paced, cross-functional team
Valid driver's license and ability to work extended hours or weekends as required by test schedules
U.S. citizenship and ability to obtain and maintain a security clearance
Preferred
Master's degree in Aerospace, Mechanical, or related field
Experience with air-breathing or rocket propulsion systems (turbomachinery, ramjet, scramjet, or hybrid systems)
Familiarity with ASME B31.3, ASME BPVC Section VIII, and pressure vessel/facility standards
Experience with command and control systems, PLCs, and test automation
Background in instrumentation calibration, dynamic data collection, and signal processing
Experience with facility commissioning or large-scale test system buildouts
Hazardous operations or pyrotechnic system experience
Familiarity with DOE, DoD, or NASA test safety and operational standards
Benefits
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
Company
Hermeus
Hermeus is developing Mach 5 aircraft to speed up the global transportation network.
201-500 employees
Funding
Current Stage
Growth StageTotal Funding
$215.96MKey Investors
Sam AltmanUnited States Air ForceNASA
2025-07-30Series B
2024-07-02Series B· $39.96M
2022-03-10Series B· $100M
Leadership Team
AJ Piplica
Founder, Chief Executive Officer
Glenn Case
Founder and Chief Technologist
Recent News
MarketScreener
2025-10-10
2025-10-10
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