Senior Mechanical Engineer - Machine Design

About Aalo Atomics Aalo Atomics is pioneering a new era in clean energy with factory-fabricated microreactors designed to deliver affordable, scalable, and reliable nuclear power. Our mission is to make nuclear energy globally accessible, starting with the Aalo-1, a 10 MWe reactor leveraging cutting-edge safety, modularity, and efficiency. Based in Austin, TX, we’re rapidly growing as we work to deploy the world’s first fleet of advanced microreactors. Join us and help revolutionize energy for a sustainable future. About the role: As the Senior Manufacturing Engineer embedded in the Fuel Handling System (FHS) team, you will own how the FHS hardware actually gets made—from one-off test rigs and immersion casks to the production machine that ships to the reactor site. You will be full-time on the FHS team, working shoulder-to-shoulder with the design, test, and controls engineers in our Austin factory. You will own the producibility of every part of the system: welded structures, precision-machined components, sheet metal and bent structures, sealing surfaces, shielding assemblies, and sodium-compatible hardware. You will make the call on what gets built in-house versus sourced, drive vendor relationships when needed, and own the metrology plan for the parts that matter. We are looking for an experienced manufacturing engineer who can both turn wrenches and direct fabrication—someone who has personally welded, machined, or assembled hardware in a previous role and now leads the producibility of complex systems. This role is highly hands-on and reports into the FHS team while collaborating closely with the broader Austin manufacturing organization. Responsibilities: Own producibility for FHS hardware from concept through production: welded structures, machined components, sheet metal/bent parts, shielding assemblies, and sealing interfaces Partner with the design engineers from early concept to ensure designs are buildable, testable, and inspectable Drive in-house fabrication of test rigs, sodium immersion casks, peripheral test equipment, and the full-scale prototype Make and document the in-house vs. outsource decision for each subassembly; manage outside vendors when used Develop weld procedures, tooling, fixtures, and inspection plans for stainless steel and other sodium-service materials Drive process improvements that reduce build time and increase first-pass yield on iterative test hardware Coordinate directly with welders, machinists, and assembly technicians on the factory floor Support on-site installation and commissioning at the reactor facility in Idaho, with periodic travel Champion nuclear quality and safety culture and ensure processes comply with the Aalo Quality Manual. Basic Qualifications: Bachelor’s degree in Mechanical Engineering, Manufacturing Engineering, or related field 6+ years of manufacturing engineering experience on complex mechanical hardware Deep hands-on knowledge across multiple of: welding, machining, sheet metal forming/bending, assembly, and metrology Demonstrated ability to lead cross-functional teams and mentor junior engineers Proven track record of taking parts from drawing through reliable production Comfortable working hands-on in a fast-paced factory environment Strong ownership mindset and comfort with ambiguity Preferred Experience: Stainless steel welding experience (TIG/GTAW), especially for high-purity, vacuum, or sodium-service hardware Experience with CNC machining of complex parts and tight-tolerance assemblies CWI, CWE, or similar weld inspection certification Experience with GD&T and inspection equipment (CMM, laser tracker, optical comparator) Background in nuclear, aerospace, semiconductor, vacuum, or other high-reliability industries Experience building one-off test hardware and iterating quickly Hands-on shop background (e.g., journeyman machinist or welder who moved into engineering) Physical: Comfortable working on the factory floor alongside welders, machinists, and a