Deep Isolation is seeking a Safety and Performance Assessment Lead to direct the development, integration, and validation of the company’s Generic Safety Case for deep borehole disposal. This role is central to one of Deep Isolation’s highest-priority strategic objectives: achieving regulatory credibility and international validation for deep borehole disposal as a safe, technically mature solution for spent nuclear fuel and high-level radioactive waste. This position will lead safety analysis, performance assessment modeling, safety case documentation, and coordination with U.S. and international regulatory and peer review bodies. The Safety and Performance Assessment Lead will work cross-functionally from Engineering to Business Development. This role will also engage with international technical partners to ensure that all aspects of repository performance, radiological protection, system design, and long-term safety are rigorously documented and supported by evidence. This work will not start from scratch – Deep Isolation has published extensively on its work modeling the post-closure safety performance of its technology and has worked with supply chain partners to document key elements of the operational, pre-closure safety case. Furthermore, National Laboratories in the U.S. and internationally have also led valuable work in this space. But existing work needs synthesizing, extending, and maturing to the level a regulator would expect in a repository license application. This highly visible, multidisciplinary role offers the opportunity to shape the safety case for deep borehole disposal, transform the global nuclear waste sector, contribute to regulatory pathways in multiple countries, and guide the modeling and technical justification that will underpin Deep Isolation’s first disposal contract.