Senior Mechanical Engineer (Nuclear)

Location: Torrance, California, United States; onsite work at a 322,000-square-foot facility.

Salary: $150,000–$190,000 per year, plus a significant stock option package.

Company

hirify.global is a Series C startup developing mass-producible, inherently safe microreactors for terrestrial, underwater, and space applications, with contracts involving the military services, NASA, and the Department of Energy.

What you will do

• Own the design, layout, and mechanical integration of Power Conversion System piping, including specifications, supports, expansion joints, and component interfaces.
• Perform piping stress and structural analyses for sustained, thermal expansion, transient, vibration, and fatigue loading conditions.
• Evaluate piping loads on turbomachinery, heat exchangers, pressure vessels, and supporting structures.
• Develop piping layouts, engineering calculations, specifications, drawings, and fabrication documentation in accordance with 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 while working with suppliers and technicians.

Requirements

• Bachelor's degree in Mechanical Engineering or a related engineering discipline.
• At least 5 years of relevant experience for Senior level; 8 or more years for 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 piping design codes.
• Experience developing and reviewing piping layouts, P&IDs, engineering drawings, and fabrication documentation.
• Applicants must be a U.S. citizen or national, lawful permanent resident, refugee, or asylee, or be eligible to obtain the required U.S. Department of State authorizations under U.S. Government export regulations.

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 requirements, including Section III, and applicable nuclear quality standards.
• Hands-on experience supporting fabrication, installation, commissioning, and troubleshooting of complex piping systems.
• Experience working in a fast-paced hardware development environment.

Culture & Benefits

• Significant stock option package in addition to the listed salary.
• Values systems thinking, focus on end users, unconstrained problem-solving, nuanced decision-making, and direct engagement with customers and stakeholders.
• Teams are built in person, with an emphasis on working together at the facility and meeting customers, users, and stakeholders face to face.
• Work involves complex energy, defense, and space systems intended to address climate, security, and space-expansion challenges.