Job Description We're seeking a Senior Information Systems Security Officer (Sr. ISSO) to support a mission-critical program in Annapolis Junction, MD. In this role, you'll oversee the security posture of classified systems, enforce cybersecurity policies, and guide compliance efforts under DoD RMF and NIST standards. Ideal candidates bring deep ISSO experience in DoD or IC environments and are ready to lead in a high-security, high-impact setting. Key Responsibilities: Maintain the operationa