Staff Mechanical Engineer (Nuclear)

Location: Onsite at the hirify.global facility in Torrance, California, USA.

Salary: $170,000–$220,000 per year, plus stock options.

Company

hirify.global is a Series C startup developing mass-producible, inherently safe microreactors for terrestrial, underwater, and space applications.

What you will do

• Own the design, layout, and mechanical integration of high-temperature and high-pressure Power Conversion System piping, including specifications, supports, expansion joints, and interfaces.
• Perform piping stress and structural analyses for sustained, thermal expansion, transient, vibration, and fatigue loading.
• Evaluate piping loads on turbomachinery, heat exchangers, pressure vessels, and supporting structures.
• Develop piping layouts, calculations, specifications, drawings, and fabrication documentation to applicable ASME codes and standards.
• Collaborate with thermal, mechanical, structural, and systems engineers to optimize pressure losses, manufacturability, and system integration.
• Support procurement, fabrication, assembly, testing, commissioning, and troubleshooting with suppliers and technicians.

Requirements

• Bachelor’s degree in Mechanical Engineering or a related engineering discipline.
• 8+ years of relevant experience for the Staff level.
• Experience designing high-temperature and/or high-pressure piping systems for industrial or power-generation applications.
• Proficiency in piping stress analysis, including thermal expansion, support reactions, and equipment nozzle loads.
• Familiarity with ASME B31.3 or B31.1 and experience developing or reviewing piping layouts, P&IDs, engineering drawings, and fabrication documentation.
• Applicants must meet U.S. Government export-control requirements as a U.S. citizen or national, lawful permanent resident, refugee, asylee, or person eligible to obtain the required authorizations.

Nice to have

• Experience in nuclear, power generation, oil and gas, aerospace, or other high-performance thermal-fluid systems.
• Proficiency with CAESAR II, AutoPIPE, or equivalent piping stress-analysis tools, and familiarity with FEA tools.
• Experience with piping vibration, pulsation, acoustic loading, water hammer, and fatigue assessment.
• Experience designing pipe supports, flexible connections, expansion joints, and high-temperature piping interfaces.
• Familiarity with ASME BPVC Section III and applicable nuclear quality standards.
• Hands-on experience supporting fabrication, installation, commissioning, and troubleshooting of complex piping systems.
• Experience in a fast-paced hardware development environment.

Culture & Benefits

• Work in person with teams developing nuclear hardware in a 322,000-square-foot R&D and production facility.
• Culture emphasizes systems thinking, end-user focus, challenging conventional approaches, face-to-face stakeholder engagement, and operating in ambiguity.
• Compensation includes a significant stock option package in addition to salary.
• hirify.global is an Equal Opportunity Employer.