System One is seeking an experienced Senior Mechanical Engineer to support the design and development of reactor structures and components for a next-generation Generation IV advanced nuclear reactor program. This role is focused on high-integrity nuclear equipment design and requires deep expertise in ASME Section III nuclear design and certification.

The Senior Engineer will work within a high-performing, multidisciplinary team of engineers and scientists developing advanced reactor systems. This role reports to the Reactor Enclosure System Component Manager and plays a critical role in design certification, licensing support, and supplier oversight.
Position Summary
The Senior Mechanical Engineer will lead and execute design solutions for reactor structures and pressure-retaining components, from requirements definition through final design. The successful candidate will be responsible for preparing, reviewing, and certifying Design Specifications (DS) and Design Rep...