Staff Mechanical Engineer, Propulsion

The posting, as Firestorm wrote it

Firestorm is hiring a Staff Mechanical Engineer, Propulsion who will own the propulsion systems that power our sUAS platforms—from small piston and heavy-fuel engines to the fuel, induction, ignition, and exhaust architectures that surround them. You will be responsible for engine selection, integration, calibration, and qualification across Firestorm’s fuel-based aircraft, translating mission endurance and performance requirements into producible powerplant solutions.

This is a deeply hands-on, full-time role. You will spend time at the test stand, in the engine cell, and on the flight line. You will design and instrument test articles, develop ECU calibrations, investigate failures, and partner with airframe and systems engineering to make sure our propulsion systems deliver power, endurance, and reliability across the full operational envelope.

What You'll Do

• Own development and integration of both small piston engines and micro turbojet propulsion systems, including engine selection, inlet/exhaust configuration, fuel and ignition architecture, thrust and power characterization, and ground/flight test campaigns tailored to each propulsion type.
• Develop and execute engine test plans on test stands and in-flight: power and torque mapping, BSFC characterization, endurance runs, vibration surveys, and altitude/temperature performance testing.
• Lead engine calibration and tuning, including AFR targets, EGT management, ignition timing, and injector strategy on EFI-equipped powerplants; identify and mitigate single-injector maldistribution and other cylinder-to-cylinder variability.
• Design and analyze fuel systems—tanks, lines, pumps, filters, regulators, and fuel pressure management—across the full flight envelope, including negative-G and altitude effects.
• Investigate and root-cause propulsion anomalies (RPM collapse, lean events, misfires, mechanical failures); develop structured multi-phase test plans and drive corrective action.
• Specify and qualify propellers in coordination with aerodynamics, balancing thrust, efficiency, ground clearance, acoustic signature, and vibration.
• Develop and maintain propulsion engineering documentation: interface control documents, test plans and reports, propulsion budgets (power, fuel burn, endurance), and configuration baselines.
• Partner with thermal engineering on engine cooling, exhaust routing, and heat rejection.
• Partner with electrical engineering on ECU integration, sensor selection, harnessing, and telemetry.
• Interface with engine OEMs, fuel system vendors, and propeller manufacturers as the technical lead for propulsion procurement and qualification.
• Travel to test sites and customer locations to support propulsion test events and field troubleshooting.
• Perform other duties as directed

Required Qualifications

• Bachelor's degree in Mechanical, Aerospace/Aeronautical Engineering or a related field.
• 'U.S. Person' as defined by 22 CFR § 120.62 required due to IT

[…]
ance

• Critical Illness insurance
• Accident insurance
• Basic Life/AD&D, short-term and long-term disability insurance, 100% covered by Firestorm. Plus, the option to purchase additional life insurance for you and your family.
• Mental Health Resources: We provide free mental health resources 24/7 including therapy and more. Additional work-life services, such as free legal and financial support, are available to you as well.

Export Control Compliance

To conform to U.S. government export control regulations, including the International Traffic in Arms Regulations (ITAR) and Export Administration Regulations (EAR), you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or otherwise eligible to obtain the required authorizations from the U.S. Department of State or U.S. Department of Commerce.

Equal Opportunity Statement

Firestorm is an equal opportunity employer, committed to creating a diverse and inclusive workplace, and upholding equitable hiring practices. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, or any other characteristic under federal, state, or local law, including those with a criminal history, in a manner consistent with the requirements of applicable state and local laws, including the CA Fair Chance Initiative for Hiring Ordinance. We actively encourage members of recognized minorities, women, Veterans, and those with disabilities to apply, and we work to create a welcoming and supportive environment for all applicants throughout the interview process.

Firestorm is committed to fostering an inclusive and accessible work environment. If you require accommodations or assistance during the application process, please don’t hesitate to reach out to us at careers@launchfirestorm.com so we can provide the support you need.