Information Systems Security Officer

ManTech International seeks an Information Systems Security Officer to protect critical federal systems in a mission-focused environment. The ISSO will implement and maintain security controls, lead RMF and A&A activities, manage POA&Ms, and ensure compliance with NIST, FISMA, and agency policies. Responsibilities include coordinating assessments, monitoring vulnerabilities, supporting incident response, and preparing audit-ready documentation. You'll collaborate with engineers and cyber teams, leverage continuous training, and contribute directly to high-impact national security missions with clear paths for growth.