Senior Propulsion Engineer - Ground Fluids

Location: On-site in El Segundo, California, United States. Relocation support may be available for new hires.

Salary: $140,333–$179,314 per year, plus potential stock options and/or long-term cash awards.

Company

hirify.global develops commercial space infrastructure, including in-orbit pharmaceutical processing systems, reentry capsules, heat shields, and satellite buses, which it builds, integrates, and tests in-house.

What you will do

• Own the architecture, schematics, mechanical design, build, testing, and operations of ground fluid systems across spacecraft programs.
• Lead propellant loading campaigns across multiple sites, establishing safe, efficient, and reliable operational practices.
• Define propellant handling processes and ensure commodities meet flight specifications.
• Develop the ground fluids roadmap, identify capability gaps, and prioritize infrastructure investments.
• Author technical standards, work instructions, engineering documentation, and design guidance for the propulsion organization.
• Mentor engineers, represent ground fluids in design reviews and launch-site coordination, and resolve complex cross-functional issues.

Requirements

• Bachelor’s degree in Aerospace Engineering, Mechanical Engineering, or a related discipline, or equivalent professional experience.
• At least 3 years of hands-on experience defining, designing, building, and testing propulsion fluid systems for spacecraft or launch vehicles.
• Strong knowledge of pressurized components, tubing, fittings, seals, valves, and instrumentation, including fluid-system manufacturing and installation methods.
• Experience authoring and executing operational procedures for ground tests or flight campaigns and reading and creating P&IDs.
• Familiarity with 91-710 or equivalent range safety requirements, plus proficiency with CAD tools and PLM software.
• Must be authorized to work in the United States and qualify as a U.S. person for access to export-controlled technology.

Nice to have

• Six or more years of propulsion fluid systems experience on spacecraft or launch vehicles.
• Experience with hypergolic, cryogenic, or other spacecraft-grade propellants.
• Test or launch-site operations experience involving range safety and launch-site personnel.
• Experience leading a technical team or sub-discipline and developing propulsion engineering standards.
• Exceptional technical communication and precision in work instructions, specifications, assembly procedures, and engineering memos.

Culture & Benefits

• Full-time employment with flexible paid time off and 12 paid holidays.
• Company-paid medical, dental, and vision insurance, with FSA and employer-matched HSA options.
• Parental, family-building, pregnancy, parenting, menopause, and disability benefits.
• Stock incentives, a 401(k) plan with a 6% employer match, and relocation support when needed.
• Daily lunch, twice-weekly dinner, wellness reimbursement, EV charging, and company events.