Senior Mechanical Engineer (Nuclear)

TL;DR

Senior Mechanical Engineer (Nuclear): Designing and developing critical structures for a portable nuclear microreactor with an accent on structural integrity, material selection, thermomechanical analysis, and manufacturability. Focus on solving complex high-temperature, vibration, shock, shielding, and volumetric-constraint challenges while integrating designs into assembly and testing.

Location: 100% onsite at the El Segundo, California headquarters; extended hours and weekends may be required. The position involves access to technology subject to U.S. export controls.

Salary: $133,500–$184,800 annually, plus equity.

Company

hirify.global is a startup developing mass-produced, portable nuclear microreactors for hospitals, data centers, remote sites, and military bases.

What you will do

• Own the design and development of critical reactor structures, including transportable shielding, container systems, and high-temperature graphite and metallic systems.
• Conduct trade studies, select materials, and develop designs that meet program requirements.
• Perform static strength, durability, fatigue, vibration, shock, and other structural analyses using hand calculations and finite element tools.
• Develop manufacturing and assembly instructions, test plans, and subassembly schedules.
• Create and manage bills of materials, develop suppliers, and support component manufacturing.
• Own subsystem FMEA and communicate requirements and technical feedback across engineering disciplines.

Requirements

• Bachelor’s degree in Mechanical, Aeronautical, Civil, or Structural Engineering.
• At least 6 years of experience designing structures.
• At least 4 years of stress-analysis experience using hand calculations and finite element tools such as Abaqus, Ansys, FEMAP, or similar.
• Experience with structural integrity, thermomechanical analysis, and free-body diagrams.
• Ability to work 100% onsite in El Segundo and comply with applicable U.S. export-control requirements.
• Strong organizational, written, oral communication, and cross-functional collaboration skills.

Nice to have

• Experience designing multi-component assemblies in NX or similar CAD tools.
• Experience with manufactured, deployed, and iteratively improved hardware.
• Experience resolving thermal-expansion issues and applying GD&T.
• Experience using text-based software development tools.

Culture & Benefits

• Substantial incentive stock plan for full-time employees.
• Comprehensive medical, vision, dental, life, accident, hospital, critical-illness, commuter, FSA, and HSA benefits.
• Eight weeks of paid parental leave for all parents, with additional paid pregnancy leave for California employees.
• Flexible PTO, remote workday allocation, catered lunch, snacks, and drinks.
• Company events, team-bonding activities, and an onsite headquarters near the Pacific Ocean.