Hands-on experience with hardware design, fabrication, and testing Working knowledge of manufacturing, fabrication, integration, and quality control relevant to fluid components (such as machining, inspection, assembly, testing, etc.) Knowledge of fluid components such as valves, regulators, pressure transducers, tubing, pressurized hardware, seals, and instrumentation and experience performing fluid systems sizing analysis with such components Experience developing and formalizing procedures for complex, multistep, high-impact operations Proven ability to rapidly develop solutions with partially defined or evolving requirements Desired Qualifications Advanced degree in Mechanical Engineering, Aerospace Engineering, or equivalent field 10+ years of experience developing launch vehicle or spacecraft propulsion systems In-depth knowledge of cryogenic, high-pressure, or high-temperature system operations Experience with fluid system subcomponent or pressurized component development, design, or testing (such as valves, regulators, piping systems, pumps, etc.) Experience in working with data acquisition systems and test instrumentation including pressure transducers, thermocouples, resistance temperature detectors (RTDs), flow meters, load cells, and accelerometers Experience reducing the complexity of large integrated assemblies to reduce part count, cost, and lead time Demonstrated experience with full hardware lifecycle ownership, from blank-sheet design through full operation Firefly offers outstanding benefits for our employees, including generous health, dental and vision plans with low plan deductibles, parental leave, educational reimbursement, short term disability, and flexible PTO options. RESPONSIBILITIES Demonstrate full ownership of launch vehicle engine system hardware from concept to flight Serve as the propulsion representative for Alpha engine testing, stage testing, and launch operations Author and lead test readiness, launch readiness, and data review presentations Continuously build and iterate on tools to optimize efficiency, performance, and predictability of Alpha operations Lead development of innovative design concepts for propulsion integration and operations that reduce complexity and maximize reliability within program constraints.