Senior Propulsion Engineer (Rocket Propulsion)

Location: Mojave, California, United States; onsite office role. Relocation assistance is provided for qualified candidates moving to Mojave. Applicants must be U.S. Persons eligible to obtain required export authorizations under ITAR and EAR.

Salary: $130,000–$160,000 USD base salary annually.

Company

hirify.global develops mission-critical space, defense, and national security technologies, including propulsion systems for sub-orbital vehicles.

What you will do

• Design and test rocket propulsion systems using cryogenic propellants.
• Size propulsion components including combustion devices, valves, feed lines, turbomachinery, tanks, and pressurization systems.
• Design and analyze injectors, combustion chambers, nozzles, gas generators, cooling channels, and related technologies.
• Build fluid-thermal models, perform trade studies, and guide design decisions.
• Create hardware drawings and component specifications for manufacturing, vendors, and procurement.
• Develop test plans, execute component and system tests, analyze results, and support technical readiness and safety reviews.

Requirements

• B.S. in Mechanical or Aerospace Engineering.
• 6+ years of relevant rocket propulsion system development experience.
• Experience with cryogenic propellants, preferably liquid methane and liquid oxygen.
• Experience designing and analyzing high-pressure fluid or pneumatic systems.
• Ability to create conceptual designs, perform trade studies, and select a design baseline.
• U.S. Person status and eligibility for required U.S. export authorizations are required.

Nice to have

• M.S. in Mechanical or Aerospace Engineering.
• Experience with CFD tools such as ANSYS Fluent or CFX and rocket-engine modeling software.
• Experience with additive manufacturing, CAD, pressure vessels, turbopumps, and hypergolic bipropellant systems.
• Programming experience with Python, C/C++, MATLAB, or Fortran.
• Hands-on fabrication, rocket fuel handling, and test-facility operations experience.

Culture & Benefits

• Flexible Time Off and support for work-life balance.
• Medical, dental, and vision coverage for employees and families.
• 401(k) plan with a 50% company match on contributions up to 8%.
• Wellness programs, gym membership options, and additional voluntary benefits.
• Opportunity to work with a technical team in a mission-driven aerospace environment.