Senior Mechanical Engineer – Thermal/Structural Analysis (Nuclear)

Location: Austin, TX, United States

Company

hirify.global develops factory-fabricated microreactors for affordable, scalable, and reliable nuclear power, including the 10 MWe Aalo-1 reactor.

What you will do

• Lead structural and stress analyses for reactor components and systems, including stress, fatigue, creep, seismic, and coupled thermal-fluid-structural behavior.
• Develop and validate FEA and CFD models to support reactor design, performance, and safety decisions.
• Conduct ASME Section III mechanical design and pressure-boundary analyses.
• Collaborate with design, manufacturing, and licensing teams to optimize performance, safety, manufacturability, and cost.
• Support test planning, data analysis, design verification, and verification and validation activities.
• Document analytical results for regulatory and licensing submissions, mentor junior engineers, and help establish internal analysis standards.

Requirements

• B.S. or M.S. in Mechanical, Structural, or Nuclear Engineering.
• 10+ years of experience in structural and thermal analysis of complex systems, such as nuclear or aerospace systems.
• Expertise with FEA tools including ANSYS, Nastran, or Abaqus.
• Strong knowledge of ASME Section III and related nuclear design codes.
• Understanding of material behavior in high-temperature and radiation environments.
• Strong communication and leadership skills, including experience mentoring engineers.

Nice to have

• Experience with sodium-cooled or advanced reactor systems.
• Familiarity with CFD tools such as Fluent or STAR-CCM+.
• Familiarity with NRC licensing processes and QA/QC standards.
• Experience with modular manufacturing or pressure-boundary component design.
• Proficiency with Siemens NX, Simcenter 3D, or similar integrated modeling environments.

Culture & Benefits

• Mission-driven work focused on advanced nuclear energy and clean power.
• Opportunity to contribute to cutting-edge microreactor technology with potential global impact.
• Competitive compensation package including equity options.
• Professional growth and advancement opportunities in a rapidly scaling company.