Senior Propulsion Engineer - Ground Fluids (Aerospace)

Location: On-site in El Segundo, California, United States

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, satellite buses, and related ground equipment.

What you will do

• Own the architecture, schematics, mechanical design, build, testing, and operation of ground fluid systems across spacecraft programs.
• Lead propellant loading campaigns across multiple sites and establish safe, efficient, and reliable operating practices.
• Define propellant handling processes and ensure commodities meet flight specifications.
• Set the ground fluids roadmap, identify capability gaps, and prioritize infrastructure investments.
• Author technical standards, work instructions, engineering documentation, and operational procedures.
• Represent ground fluids in design reviews and launch-site coordination, resolve escalated issues, and mentor junior and mid-level engineers.

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.
• Working knowledge of pressurized components, tubing, fittings, seals, valves, instrumentation, manufacturing processes, and installation methods.
• Experience authoring and executing ground-test or flight-campaign procedures and reading and authoring 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

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

Culture & Benefits

• Regular 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.
• 401(k) plan with a 6% immediately vested employer match and incentive equity.
• Relocation support may be available for new hires, along with wellness reimbursement, meals, team events, and EV charging.