Top Secret/SCI ISSO — Cyber Defense & RMF Expert

General Dynamics Information Technology; Maryland; On-site; USD 111,000 - 150,000; Full time

Job summary

General Dynamics Information Technology is seeking an Information Systems Security Officer (ISSO) to support national defense initiatives and secure multi-domain classified networks. You will manage the full security lifecycle, maintain ATOs, and ensure RMF compliance across enterprise infrastructure.

The role requires TS/SCI with CI Poly, a IT-related degree or equivalent experience, and DoD 8140 certifications.

Qualifications

• Active TS/SCI clearance with CI Polygraph
• Bachelor’s degree in an IT-related field, or 10+ years of relevant IT experience in lieu of a degree
• Meet DoD 8140 Information Assurance Workforce certification requirements (e.g. Security+ CE)
• Hands-on experience performing ISSO functions under the RMF
• Strong understanding of NIST SP 80037, 80053, CNSSI 1253, and FISMA-aligned security practices
• Experience managing authorization package documentation, vulnerability assessments, and STIG compliance
• Ability to evaluate system risks, track remediation, and coordinate security efforts across engineering and operations teams
• Familiarity with enterprise security logging tools (e.g., Splunk) and vulnerability monitoring tools
• Strong communication, documentation, and collaboration skills
• LOCATION: Onsite

Responsibilities

• Serve as the primary cybersecurity advisor on system security posture, threats, vulnerabilities, and compliance requirements
• Maintain and update security authorization packages, documentation, and baseline artifacts throughout the system lifecycle
• Ensure systems retain active Authority to Operate (ATO) through continuous monitoring, updates, and alignment with security policies
• Develop and manage POA&Ms, risk acceptance requests, waivers, and exceptions for identified vulnerabilities
• Perform periodic system reviews, update security controls, and coordinate required security-driven configuration changes
• Audit system logs and monitors outputs to identify compliance issues or abnormal activity and coordinate remediation
• Oversee secure system recovery, validating restoration of approved security configurations
• Manage system decommissioning activities, ensuring secure sanitization and proper documentation
• Collaborate with engineers, system owners, and technical teams to validate controls and support accreditation updates

Skills

Classified Networks

Cybersecurity Compliance

DISA STIG

ISSO

RMF

Education

Bachelor’s degree in IT-related field

10+ years IT experience in lieu of degree

Tools

Splunk

Job description

General Dynamics Information Technology is seeking an Information Systems Security Officer (ISSO) to support national defense initiatives and secure multi-domain classified networks. You will manage the full security lifecycle, maintain ATOs, and ensure RMF compliance across enterprise infrastructure.

The role requires TS/SCI with CI Poly, a IT-related degree or equivalent experience, and DoD 8140 certifications.