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# Information System Security Officer (ISSO)

- **Company:** Leidos, Inc.
- **Location:** Lorton, VA, United States
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** Cloud Computing, Cyber Security, Information Systems, Information Security Management, Intrusion Detection Systems, Network Security, Security Information and Event Management, Firewalls (Computer Science), Vulnerability Analysis
- **Published:** August 11, 2026
- **Apply:** https://us.experteer.com/career/view-jobs/information-system-security-officer-isso-lorton-va-usa-58917291

## About the Role

the and security audits with remediation guidance * Manage continuous monitoring of security controls for classified and unclassified data * Coordinate with cross-functional teams to implement security protocols and best practices * Ensure RMF accreditation is completed and maintained * Act as primary security contact for incident response and reporting * Provide security training and awareness for personnel operating DoD systems * Maintain security documentation (SSPs, risk assessments, POA&Ms) and stay updated on threats Tasks * Active Top Secret clearance with ability to obtain SCI before start date * Bachelor's degree with 4+ years of experience or Master's with 2+ years (experience may substitute for degree) * Deep knowledge of DoD cybersecurity policies and frameworks (NIST 800-53, RMF, FISMA, ICD 503/705, JSIG, DAAPM) * Experience with cloud computing and achieving/maintaining ATO for cloud-based systems * DoD 8140 Intermediate certification (e.g., Cloud+, Security+) * Experience
in system security engineering, risk management, and vulnerability assessments * Strong understanding of network security, controls, and tools (firewalls, IDS/IPS, SIEM, EPP) * Ability to work independently and with cross-functional teams * Strong written and verbal communication for security reporting * Interest in continuous cybersecurity learning Key requirements *

## Description

Experteer Overview In this role you will safeguard DoD information systems by leading cybersecurity posture, policy development, and RMF-based accreditation. You will work closely with the ISSM and cross-functional teams to implement security controls, perform risk assessments, and sustain continuous monitoring to protect data confidentiality, integrity, and availability. The position emphasizes hands-on technical work, incident response support, and ongoing compliance with DoD standards in a fast-paced environment. This is a locally-based, on-site role focused on delivering mission-critical cyber security for Air Force lifecycle programs. Compensation / Benefits * Collaborate daily with the ISSM to provide cybersecurity guidance * Develop and maintain security policies, procedures, and documentation for DoD standards (NIST, RMF, FISMA, JSIG) * Oversee cybersecurity posture of DoD information systems ensuring CIS requirements are met * Perform risk assessments, vulnerability assessments, and security audits with remediation guidance * Manage continuous monitoring of security controls for classified and unclassified data * Coordinate with cross-functional teams to implement security protocols and best practices * Ensure RMF accreditation is completed and maintained * Act as primary security contact for incident response and reporting * Provide security training and awareness for personnel operating DoD systems * Maintain security documentation (SSPs, risk assessments, POA&Ms) and stay updated on threats Tasks * Active Top Secret clearance with ability to obtain SCI before start date * Bachelor's degree with 4+ years of experience or Master's with 2+ years (experience may substitute for degree) * Deep knowledge of DoD cybersecurity policies and frameworks (NIST 800-53, RMF, FISMA, ICD 503/705, JSIG, DAAPM) * Experience with cloud computing and achieving/maintaining ATO for cloud-based systems * DoD 8140 Intermediate certification (e.g., Cloud+, Security+) * Experience in system security engineering, risk management, and vulnerability assessments * Strong understanding of network security, controls, and tools (firewalls, IDS/IPS, SIEM, EPP) * Ability to work independently and with cross-functional teams * Strong written and verbal communication for security reporting * Interest in continuous cybersecurity learning Key requirements *


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