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Information System Security Officer

MANTECH
Columbia, MD Full Time
POSTED ON 3/27/2026
AVAILABLE BEFORE 5/20/2026
Mantech seeks a motivated, career driven, and customer-focused Information System Security Officer (ISSO) to join our team in Columbia, Maryland.

You will play a critical role in supporting enterprise infrastructure capabilities for a global, mission-focused workforce. As an ISSO, you will work alongside customers, Integrated Product Teams (IPTs), and vendors to support the implementation and compliance of advanced EIT capabilities through Data Center & Compute Services. You will manage cybersecurity documentation, assess system vulnerabilities, and support the Risk Management Framework (RMF) lifecycle in alignment with Sponsor policies.

Responsibilities Include, But Are Not Limited To

  • Update and maintain hardware and software inventory records, including associated change logs
  • Support and coordinate Secure the Enterprise (STE) and Secure the Network (STN) activities
  • Review and address Xacta notices and ensure compliance documentation is accurate and current
  • Complete SEAR audit log records in accordance with Sponsor standards
  • Track, review, and resolve POAMs (Plan of Action and Milestones) related to IAVA/IAVAx findings
  • Develop and maintain System Security Plans (SSPs) for both new and existing systems
  • Analyze vulnerability scan results and collaborate with system owners to implement remediation
  • Leverage sponsor tools such as Gatekeeper, Xacta, SEAR, and LatteArt in daily operations

Minimum Qualifications

  • Bachelor’s degree with 12 years of relevant experience OR associate’s degree with 15 years of relevant experience OR high school diploma/GED with 20 years of relevant experience
  • Experience with Xacta, LatteArt and other sponsor tools
  • Experience managing POAMs, performing audit log reviews, and maintaining secure system inventories
  • IAM I certification (DoD 8140 required upon start of employment. Acceptable certifications include CAP/CND/Cloud /GSLC/Security CE/HCISSP/CASP CE/CISM/CISSP/ or CCISO)

Preferred Qualifications

  • Knowledge of STE and STN processes and coordination
  • Experience with Gatekeeper, SEAR, SCANBOY
  • Experience with the Service Now (SNOW) platform

Clearance Requirements

  • Must possess and maintain a current/active TS/SCI clearance with Polygraph

Physical Requirements

  • Must be able to remain in a stationary position 50% of the time
  • Occasionally moves about inside the office to access file cabinets, office machinery, etc.
  • Frequently communicates with co-workers, management, and customers, including delivering presentations. Must be able to exchange accurate information in these situations

Salary.com Estimation for Information System Security Officer in Columbia, MD
$128,449 to $152,910
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