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# Senior Information Systems Security Officer (ISSO-3)

- **Company:** Leidos, Inc.
- **Location:** Annapolis Junction, MD, United States
- **Experience:** Expert
- **Salary:** $107,900.0 - $195,050.0
- **Contract:** Permanent contract
- **Skills:** Cyber Security, Information Systems, Identity and Access Management, Information Security Management, Computer Network Operations
- **Published:** June 18, 2026
- **Apply:** https://www.clearancejobs.com/jobs/8982540/senior-information-systems-security-officer-isso-3

## About the Role

* Qualifications: Bachelor's degree plus eight (8) years of relevant experience or master's degree plus six (6) years of relevant experience. An associate's degree or 18 semesters hours of military coursework/training in a computer-related field plus 10-years of relevant experience or high school diploma/GED plus 12-years of relevant experience may be considered. Information Assurance Manager (IAM) Tier 1 certification (CAP, Security + CE, GSLC).
 * Desirable Skills: Excellent written and oral communication skills
 * Security Clearance: Active TS/SCI with Polygraph required to be considered for this role.

## Description

Seeking a self-starting, motivated individual to be the Information System Security Officer supporting Computer Network Operations with maintaining compliance and strengthening the security posture of critical mission systems via the Risk Management Framework; will be responsible for 6 System Security Plans (SSPs)., * Mission Focus: Ensure the appropriate operational security posture is maintained for information systems. Support continuous monitoring of networks to detect and correct areas of security non-compliance, unmitigated vulnerabilities, and other risks. Follow consistent security processes and play a role in the information systems continuous monitoring program. Perform regular audits of information systems. Assist the information systems security manager in preparing the information system for periodic reaccreditation

 * Technical Proficiency: Experience as an ISSO with emphasis on Defense-in-Depth principles, network, and enterprise security architecture. Experience applying the principles of the NIST 800-53 including the procedures in the Risk Management Framework (RMF). Familiarity with STE/STN requirements and associated tools and tradecraft.


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