Demo

Senior Information Systems Security Officer

MANTECH
Washington, DC Full Time
POSTED ON 11/2/2026
AVAILABLE BEFORE 12/25/2026
MANTECH seeks a motivated, career and customer-oriented Senior Information Systems Security Officer (ISSO) to join our team in Washington, D.C. This is an on-site position.

The Senior ISSO will leverage their strong technical background and knowledge to support accreditation efforts, to include creating Body of Evidence (BOE) documentation, responding to/implementing/documenting required controls, and completing required tasks and actions.

Responsibilities Include But Are Not Limited To

  • Create, update, maintain, and interpret required Body of Evidence (BOE) documentation to navigate system accreditation processes.
  • Ensure the day-to-day implementation, oversight, continuous monitoring, and maintenance of system security configurations and practices.
  • Conduct required vulnerability scans, review reports to identify vulnerabilities, and perform comprehensive vulnerability analysis.
  • Develop, oversee, and track Plans of Action and Milestones (POAMs) to effectively mitigate discovered security risks.
  • Coordinate with system owners, ISSMs, and team resources to diagnose operational issues and implement necessary technology solutions.
  • Document and implement plans detailing security postures, proper configurations, and secure remote access capabilities for applications.

Minimum Qualifications

  • 10 years of related information systems security experience, or a Master's degree with 7 years of experience.
  • Bachelor's Degree or equivalent (6 additional years of experience).
  • Must possess one or more relevant industry certifications, such as CISM, CISSP, CISSP-ISSMP, FITSP-M, GCIA, GCIH, GICSP, or GSLC.
  • Significant experience navigating technical accreditation processes, meeting strict security requirements, and creating A&A Body of Evidence (BOE) documentation.
  • Familiarity operating standard security and discovery tools including Tenable Nessus, Security Center, IBM Guardium, HP WebInspect, and Network Mapper (NMAP).
  • Proven experience managing complex network documentation, inventorying networks, and working across large technical teams to drive a standardized security agenda.

Preferred Qualifications

  • Cloud Certification.
  • Hands-on experience utilizing cyber risk and compliance automation tools.
  • Self-starter with excellent interpersonal skills, capable of organizing boards and driving change across organizational teams.

Clearance Requirements

  • Current/Active TS/SCI Required.
  • Abilty to obtain and maintain a polygraph.

Physical Requirements

  • Must be able to remain in a stationary position 50% of the time.
  • Needs to occasionally move about inside the office to access file cabinets, office machinery, and other equipment.
  • Frequently communicates with co-workers, management, and customers, which may involve delivering presentations.
  • Must be able to exchange accurate information in these situations.

Salary.com Estimation for Senior Information Systems Security Officer in Washington, DC
$122,856 to $150,891
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