Senior Mechanical Design Engineer (Nuclear)

Location: Must be based in the United States and willing to work on-site in Austin, TX. Applicants must be U.S. Citizens or U.S. Persons compliant with 10 CFR Part 810.

Salary: Starting at $130,000 per year

Company

hirify.global develops factory-fabricated microreactors designed to provide affordable, scalable, reliable nuclear power, starting with the 10 MWe hirify.global-1 reactor.

What you will do

• Lead mechanical design of major reactor module subsystems from concept through production release.
• Own technical decisions, evaluate trade-offs, and drive design reviews with cross-functional stakeholders.
• Perform and direct structural, thermal, fatigue, and seismic analyses to validate designs.
• Develop detailed 3D models, model-based definitions, engineering drawings, GD&T, BOMs, specifications, and interface control documents.
• Collaborate with manufacturing engineers on DFM/DFA, support prototype builds and testing, and incorporate lessons learned.
• Mentor junior engineers and establish mechanical design best practices.

Requirements

• Bachelor’s degree in Mechanical Engineering or a related engineering discipline.
• 7+ years of professional mechanical design experience and ownership of the full design lifecycle.
• Expert proficiency with 3D CAD tools such as SolidWorks or NX.
• Strong command of GD&T, tolerance analysis, and drawing standards.
• Experience with FEA or other structural and thermal analysis tools.
• U.S. work authorization as a U.S. Citizen or U.S. Person under 10 CFR Part 810, plus willingness to work on-site in Austin.

Nice to have

• Experience with pressure vessels, structural weldments, high-temperature systems, stainless steel, or high-nickel alloys.
• Knowledge of ASME Boiler & Pressure Vessel Code Section III or VIII and nuclear-relevant or highly regulated design standards.
• Experience transitioning complex prototypes to production and mentoring engineers.
• Familiarity with configuration management, change control, calculation software, and AI.

Culture & Benefits

• Collaborative and supportive engineering environment.
• Professional growth opportunities and intellectually challenging work.
• Health, dental, and vision insurance.
• Paid time off.
• Corporate gym membership.
• Hands-on work alongside technicians and welders in a dynamic factory environment.