Mechanical Engineer II (Propulsion Test)

Location: On-site at Stennis Space Center, Mississippi, United States. The role may require up to 10% travel to production and launch locations. A background check administered by the US government is required for on-site work at the government partner location.

Salary: $104,000–$156,000 USD annually, plus equity.

Company

hirify.global develops the Terran R heavy-lift orbital launch vehicle, its rockets, production systems, and launch infrastructure.

What you will do

• Design, build, activate, operate, and maintain test stands for high-energy components, rocket engines, and booster and upper stages.
• Develop gas, liquid, and cryogenic fluid systems, including P&IDs, analysis, component selection, and fabrication instructions.
• Design structural and mechanical systems using 3D modeling, analysis, and fabrication drawings.
• Conduct flight acceptance, qualification, and development testing while monitoring test stands, telemetry, cameras, GUIs, and automation.
• Prepare and manage test articles through inspections, functional and leak checks, post-test processing, repairs, and non-conformance resolution.
• Improve procedures, control automation, data review, work instructions, standardization, and hardware flow across test sites.

Requirements

• Bachelor’s degree in mechanical engineering, aerospace engineering, or a related field.
• Ability to safely operate common power tools and hold a valid driver’s license for vehicles used on the test site.
• Ability to deliver on tight schedules using unconventional and creative technical solutions.
• Willingness to work a scheduled morning or evening shift for Operations or Integration assignments.
• Ability to clear a US government-administered background check for on-site work at the Stennis government partner location.

Nice to have

• 3D modeling and drafting proficiency, including GD&T.
• Engineering fundamentals in thermal fluid systems and structures.
• Hands-on fabrication experience with complex assemblies.
• Experience with fluid components, large-scale fluid P&IDs, high-pressure gas, cryogenic fluids, flammables, or hydraulics.
• Technical writing or documentation experience.

Culture & Benefits

• Hands-on, fast-paced, and collaborative work across engineering, technicians, welders, and quality teams.
• Autonomy, ownership, and direct impact on rocket development and test readiness.
• Competitive salary and equity.
• Paid time off and sick leave, parental leave, and an annual learning and development stipend.

Hiring process

• Successful candidates must complete the required US government background check.