Information System Security Manager / ISSM (Active Polygraph Required)

Clearance Level
Top Secret SCI + Polygraph
Information Security
McLean, Virginia

REQ#: RQ94429

Travel Required: None
Public Trust: None
Requisition Type: Regular

We are GDIT. We support and secure some of the most complex government, defense, and intelligence projects across the country. At GDIT, cyber security is not just a singular part of our mission—it connects every one of us because it’s embedded into every aspect of what we do.

GDIT is your place. You make it your own by bringing your ideas and unique perspective to our culture. By owning your opportunity at GDIT, you are helping us ensure today is safe and tomorrow is smarter. Our work depends on an Information System Security Manager (ISSM) joining our team to support the Customer activities at Tysons.


  • Bachelors (in an IT-related field)

  • 2+ years or relevant experience

  • Technical skills

  • TS/SCI w/ Polygraph

Required Skills:

  • Support customer RMF workflow and processes by proposing, coordinating, implementing and enforcing information system security policies, instructions, standards, and methodologies
  • Review and approve customer requests related to accesses, devices, and other authorizations
  • Maintain current system information in XACTA to support organizational requirements and processes Evaluate the impact of network and system changes using RMF processes and approve the changes
  • Manage multiple projects throughout Authorization and Accreditation (A&A) process from concept to Authority to Operate (ATO)
  • Coordinate with system stakeholders on mitigating system vulnerabilities outlined in POA&Ms
  • Submit recommendations to stakeholders for system configuration deviations from the required baseline
  • Conduct periodic reviews to ensure compliance with SSP
  • Ensure configuration management for security-relevant IS software, hardware and firmware is maintained and documented
  • Ensure system recovery processes are monitored to ensure security features and procedures are properly restored
  • Ensure all IS security-related documentation is current and accessible to properly authorized individuals
  • Formally notify the appropriate individuals when changes occur that might affect authorization
  • Participate in governance and project reviews identified by the customer
  • Require strong documentation skills to create and update policies, process documentation and procedures
  • Experience with XACTA 360, Continuum and other SCAP Compliant tools
  • Demonstrated experience with RMF, ICD 503, CNSSI 1253, NIST SP 800-53/53A, and STIGs

Desired Certifications

  • Certified Ethical Hacker 10 (CEH)
  • Certified Information Systems Security Professional (CISSP)
  • Certified Information Systems auditor (CISA)
  • NIST Cybersecurity Framework (NCSF)
  • AWS Solutions Architect Associate or Professional


  • Full-flex work week
  • 401K with company match
  • Internal mobility team dedicated to helping you own your career
  • Collaborative teams of highly motivated critical thinkers and innovators
  • Ability to make a real impact on the world around you






Not sure this job’s the one for you? Check out our other openings at

Do you have a friend or colleague this posting describes? Let them know about the opportunity by clicking “Share.” 

We are GDIT. The people supporting some of the most complex government, defense, and intelligence projects across the country. We deliver. Bringing the expertise needed to understand and advance critical missions. We transform. Shifting the ways clients invest in, integrate, and innovate technology solutions. We ensure today is safe and tomorrow is smarter. We are there. On the ground, beside our clients, in the lab, and everywhere in between. Offering the technology transformations, strategy, and mission services needed to get the job done.

GDIT is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status, or any other protected class.