The ideal candidate is a hands-on cybersecurity professional who can take ownership of RMF and ATO activities, develop and maintain a complete authorization package, work effectively in eMASS, coordinate with ISSOs/ISSMs and engineering teams, and drive security findings toward resolution. The ISSE will work closely with ISSOs, ISSMs, system owners, security teams, engineers, and government stakeholders to prepare, manage, and submit security documentation and support systems throughout the RMF/ATO lifecycle.