Join Leidos' National Security Sector as a Senior ISSO

Leidos seeks a Senior Information System Security Officer (ISSO) for our Cyber & Analytics Business Area (CABA) in Annapolis Junction, MD. Protect critical national security systems on a large-scale software development program encompassing maintenance, IT support, systems integration, and enterprise applications.

Primary Responsibilities

• Implement and enforce security policies, standards, and methodologies.
• Evaluate security solutions for multi-classification processing.
• Manage configuration for security software, hardware, and firmware.
• Analyze threats, detect incidents, and execute vulnerability remediation.
• Maintain records for workstations, servers, routers, firewalls, and network devices.
• Support ISSM in sustaining operational IA posture.
• Develop C&A documentation, SSPs, and security plans.
• Handle IAVA management: scans, remediation, patching.
• Administer user authentication mechanisms.

Basic Qualifications

• Bachelor’s degree + 12 years relevant experience (or equivalent).
• TS/SCI with polygraph.
• 10+ years ISSO experience in isolated/connected environments.
• 5+ years IAVA tools experience.
• 5+ years SSP/documentation management.
• Expertise in security tools, encryption, protocols.
• Proven large-program security operations.

Preferred Qualifications

Extensive ISSO experience; familiarity with RMF, NIST 800-53, DISA STIGs.

Why Leidos?

Competitive pay ($131K-$237K), comprehensive benefits, and mission impact in SIGINT, CNO, and cyber defense. Be a solutions-oriented team player driving national security.