Core Mechanical Design - Senior Mechanical Design Engineer

As a Core Mechanical Design Engineer, you will be responsible for designing core assemblies and components that will be used in our advanced reactors. You will take designs through our process from conceptual to final design.

• Develop the design of these components to satisfy both performance and manufacturing requirements
• Create and develop design documentation to define requirements
• Conduct and participate in design reviews, providing and receiving technical feedback
• Rigorously evaluate mechanical designs to identify deficiencies and proactively propose and implement solutions
• Generate and maintain detailed 3D CAD models, 2D drawings, and bills of materials using controlled processes in PDM/PLM systems
• Coordinate closely with analysis teams to guide and interpret thermal, structural, fatigue, and safety analyses in support of design validation
• Perform detailed manufacturability reviews, tolerance studies, and DFM/DFA assessments to prepare components for fabrication and assembly
• Contribute to continuous improvement of Oklo's mechanical design processes, tools, and standards through feedback and development of best practices

This role contributes to developing fast fission power plants that deliver clean, reliable, and affordable energy at scale, helping establish a domestic supply chain for critical radioisotopes and advancing nuclear fuel recycling to convert nuclear waste into clean energy.

• Bachelor's or higher degree in Mechanical Engineering or a related engineering discipline
• 5-10 years of industry experience in mechanical or structural design within sectors such as aerospace, automotive, energy, or industrial equipment
• Proficiency in 3D CAD modeling software (e.g., Siemens NX, CATIA, SolidWorks), including part modeling, large assemblies, and detailed drawings
• Experience with CAD version control using PDM/PLM tools (e.g., Teamcenter, SolidWorks PDM, Windchill)
• Solid understanding of mechanical design principles, including DFM (Design for Manufacturability), DFA (Design for Assembly), and tolerance stack-up analysis
• Ability to apply GD&T per ASME Y14.5-2018 (or other similar standard) to engineering drawings
• Working knowledge of material selection (particularly metals), manufacturing methods, and fabrication techniques
• Demonstrated ability to collaborate on cross-functional teams, integrating feedback from analysis, manufacturing, and systems engineering
• Strong written and verbal communication skills, with the ability to clearly document and present engineering work
• Comfortable working with external manufacturers and engineering consultants for fabrication and analysis support

Oklo offers flexible time off, equity, competitive pay, 401k, health insurance, FSA, flexible work hours, and other benefits.

Salary range: $115,000 - $170,000

Oklo Inc. is developing fast fission power plants to deliver clean, reliable, and affordable energy at scale; establishing a domestic supply chain for critical radioisotopes; and advancing nuclear fuel recycling to convert nuclear waste into clean energy.