You will assist the APL team supporting the Sentinel team through conducting and assessing technical evaluations of assessed hostile and natural space environments and their effects on the weapon system, supporting development and assessment of NH&S and natural environments entrance and exit criteria for project milestones and independent assessment of contractor performance; lead, coordinate, and execute APL support of nuclear survivability-related certification efforts; and support APL's efforts to assist the government in developing near- and long-term NH&S and natural environments technical planning. In doing so, you will maintain regular communications with APL's program and project managers, line-side leaders and organizations, and fellow members of the KBY on-site technical team to increase awareness of Sentinel activities, developments, decisions, areas of concern, and opportunities where APL can help the Sentinel program.