As a Senior Mechanical Engineer at Last Energy, you'll work
directly with the CEO and core leadership team to drive forward the most critical mechanical and system-level challenges shaping our fleet-wide product. This is a role for builders, doers, and innovators who thrive in a fast-paced, hands-on environment where decisions are made quickly and your ideas directly shape the product.
Key Duties & Responsibilities- Lead design and execution of critical mechanical systems and components that enable scalable, manufacturable nuclear power plants
- Collaborate daily with the CEO and executive team on the company's most urgent engineering priorities-your technical insights will directly inform product strategy and deployment timelines
- Drive concept development, detailed CAD modeling, and rapid prototyping of novel industrial systems
- Perform structural, thermal, and fluid analyses using advanced simulation tools (FEA, CFD) to validate and optimize designs
- Design and analyze complex mechanical assemblies
- Integrate mechanical, electrical, and control systems into cohesive plant-level solutions
- Oversee prototype fabrication, assembly, and testing, both in-house and with external partners
- Develop fixtures, tooling, and manufacturing aids to streamline build and test operations
- Continuously optimize designs for manufacturability and deployment speed, balancing performance with cost and scalability
- Operate autonomously, driving projects from concept to reality in a startup culture that values speed, ingenuity, and accountability
Qualifications- Bachelor's degree in Mechanical Engineering or a related field (advanced degree a plus)
- 4+ years of hands-on mechanical design and analysis experience in high-growth, high-urgency environments (startup or advanced manufacturing preferred)
- Deep proficiency with CAD tools (SolidWorks, AutoCAD, or equivalent)
- Demonstrated expertise in FEA and CFD using software such as ANSYS, LS-DYNA, Nastran, or similar.
- Strong foundation in materials science, stress analysis, and thermal/fluid systems
- Proven ability to turn concepts into tested prototypes quickly, with minimal oversight
- Exceptional communication and collaboration skills, especially when interfacing with executives and cross-functional teams
- A bias toward action, creative problem solving, and the drive to own complex problems end-to-end
