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Aalo Atomics is pioneering factory-fabricated microreactors to deliver affordable, scalable, and reliable nuclear power globally. The company is based in Austin, TX and is rapidly growing as it works to deploy the world's first fleet of advanced microreactors, starting with the Aalo-1, a 10 MWe reactor.
As a Mechanical Engineer I, you will support the design, build, testing, and fabrication of reactor systems and supporting infrastructure. This role offers ownership of complex mechanical hardware through the full lifecycle—from concept and requirements through detailed design, fabrication, assembly, testing, and commissioning. You will work closely with controls, manufacturing, and operations teams to manage system interfaces and outcomes.
The work is hands-on, splitting time between CAD, the shop floor, and the test lab. Key responsibilities include:
• Design mechanical components, mechanisms, and assemblies supporting advanced reactor technology under senior engineer direction
• Develop 3D CAD models, engineering drawings, bills of materials, and interface documentation
• Integrate actuators, drives, encoders, limit switches, and sensors into mechanical designs; collaborate with controls engineers on motion, interlock, and instrumentation requirements
• Perform hand calculations and supporting structural, thermal, and mechanism analyses to size and justify designs
• Build, instrument, and operate test rigs to validate mechanisms, seals, and fluid system components
• Work with machinists, welders, technicians, and vendors to ensure designs are practical and manufacturable
• Develop tooling, fixtures, work instructions, and inspection plans for prototype and production hardware
• Write and maintain test procedures, calculation notes, and design documentation
• Travel occasionally to test sites, vendors, or reactor installation locations
The ideal candidate has solid mechanical design fundamentals paired with a demonstrated track record of real-world electro-mechanical builds. A Bachelor's degree in Mechanical Engineering, Aerospace Engineering, or related field is required.
