We are seeking a detail-oriented Information System Security Officer (ISSO) to support the development, maintenance, and continuous monitoring of Authorization to Operate (ATO) packages for Automated Information Systems (AIS). This role is responsible for ensuring systems meet federal cybersecurity and compliance requirements (NIST RMF, FISMA, FedRAMP as applicable) and for coordinating with system owners, engineers, and auditors throughout the authorization lifecycle. Active Top Secret clearance required.