Staff Mechanical Design Engineer, Turbomachinery

Location: 100% onsite at hirify.global's headquarters in El Segundo, California, United States

Salary: $200,500–$314,475 per year, plus equity

Company

hirify.global develops transportable, mass-produced nuclear microreactors, including the 1 MW Kaleidos reactor for critical infrastructure and commercial power applications.

What you will do

• Serve as Responsible Engineer for the turbomachinery mechanical system and own the architecture of high-speed rotating assemblies operating at up to approximately 30 krpm.
• Lead rotor dynamics, structural integrity, life analysis, and detailed design of rotors, shafts, housings, bearings, seals, and support structures.
• Define system requirements, interfaces, tolerances, fits, stack-ups, clearances, and alignment strategies for precision rotating assemblies.
• Integrate turbine, compressor, and alternator subsystems with electrical, thermal, aero, manufacturing, supplier, and test teams.
• Define and execute spin, thermal, and system-level validation; support assembly, hardware bring-up, troubleshooting, root-cause analysis, and design iteration.
• Set technical standards, conduct design reviews, guide engineering direction, and drive reliability, safety, regulatory compliance, and production readiness without direct people management.

Requirements

• B.S. in Mechanical Engineering or a related field.
• 8+ years of experience designing high-speed rotating machinery such as turbines, compressors, or similar systems.
• Deep expertise in turbomachinery mechanical design and structural analysis, including bearings, seals, and high-speed shafting.
• Expert proficiency with analysis tools such as ANSYS and advanced use of NX and Teamcenter for design, simulation, and product lifecycle management.
• Strong knowledge of tolerancing, GD&T, precision mechanical assembly, system-level thinking, and mechanical engineering judgment.
• Experience owning hardware through design, build, and test cycles, including hands-on assembly, integration, and troubleshooting of turbomachinery.
• Ability to influence cross-functional teams without authority, communicate complex technical concepts clearly, and operate in a fast-paced first-of-a-kind development environment.
• Must be willing to work extended hours and weekends as necessary.

Nice to have

• M.S. or Ph.D. in Mechanical Engineering.
• Experience with closed-loop Brayton-cycle or similar energy systems.
• Familiarity with high-temperature materials and extreme-environment design.
• Experience integrating mechanical systems with high-speed electric machines.
• Prior Responsible Engineer experience for complex hardware and experience scaling prototypes to production.

Culture & Benefits

• Full-time employees receive substantial equity, comprehensive medical, dental, vision, and related benefits.
• Eight weeks of paid parental leave for all parents, with additional paid pregnancy leave for California employees.
• Flexible PTO, catered lunch, snacks and drinks, commuter benefits, and company and team events.
• Eligible employees receive full coverage for a nuclear engineering certificate program through Penn State University.
• Work is primarily onsite, with a stated remote workday allocation, and includes in-person collaboration at the El Segundo headquarters.

Hiring process

• Applicants may contact recruiting@hirify.globalnuclear.com directly for immediate opportunities.
• Offers are contingent on the applicant's ability to comply with U.S. export controls governing access to the technology.