ISSO - TS/SCI with Polygraph

Public Trust: None

Requisition Type: Regular

Your Impact

Own your opportunity to serve as a critical component of our nation’s safety and security. Make an impact by using your expertise to protect our country from threats.

Job Description

Advance your career while impacting our national security in cyber as an ISSO at GDIT. Here, technologists have many paths to grow a meaningful career supporting cyber missions and operations across the federal government. We are seeking an experienced ISSO capable of working within Greenlight and assigned onsite Information System Security Managers to maintain and renew system security accreditations. Successful candidate must be able to prioritize multiple projects ensuring all security based operations and accreditations are completed in a timely fashion.

WHAT YOU’LL NEED TO SUCCEED:

• Education : Bachelor’s Degree in Computer Science, Engineering, or a related technical discipline, or the equivalent combination of education, technical certifications or training, or work experience.
• Required Experience: 8+ years
• Required skills and experience:
• Experience developing and reviewing security concept of operations, systems security plans, security control assessments, contingency plans, configuration management plans, incident response plans, plan of actions and milestones, risk management plans, vulnerability scanning, and/or vulnerability management plans.
• Documented experience with Greenlight and Rev4 RMF process.
• Demonstrated on-the-job knowledge and experience with cloud security design, requirements analysis, control implementation, and mitigation.
• Demonstrated experience developing in a cloud environment such as Amazon Web Service
• Demonstrated on-the-job knowledge and experience with ICD-503, FISMA and RMF/A&A processes, NIST SP (800-27, 30, 37, 53, 60, 137, 144, 145), FIPS (199, 200), and CNSSI 1253 technical controls and developing and maintaining associated certification and accreditation documentation.
• Demonstrated on-the-job knowledge and experience with performing security system scans for network, platform, database, and web services using different security tools (e.g. Nessus, Weblnspect, AppDetective).
• Outstanding interpersonal skills and team player
• Outstanding written and verbal communication skills; ability to present reports to management; motivated to thoroughly investigate, analyze, and document system issues and resolutions
• Demonstrated outstanding ability to produce quality deliverables and to complete assigned projects on time, provide consistent status updates to ensure IT security projects stay focused.
• Demonstrated outstanding attention to detail - completes tasks per standard operating procedures; reports discovered anomalies and inconsistencies
• Demonstrated outstanding persistent and creative problem solver - strong troubleshooting skills and determined to find solutions to technical problems; identifies root cause and presents possible solutions to management
• Demonstrated outstanding work ethic and a proven professional - respectful, dependable, takes initiative
• Security Clearance Level : Top Secret/SCI with Polygraph
• Desired skills and experience:
• Certifications CISSP, CASP
• Experience cloud security design, requirements analysis, control implementation, and mitigation.
• Experience with JIRA and managing security based requirements
• Project or program management experience.
• Location : Chantilly, VA on customer site
• Hours: Core Hours: 9-3
• US Citizenship Required

GDIT IS YOUR PLACE:

• 401K with company match
• Comprehensive health and wellness packages
• Internal mobility team dedicated to helping you own your career
• Professional growth opportunities including paid education and certifications
• Cutting-edge technology you can learn from
• Rest and recharge with paid vacation and holidays

#GDITCareers
#JET
#GDITEnhanced2026

#VA_2026Alumni

Work Requirements

Years of Experience

8 + years of related experience

* may vary based on technical training, certification(s), or degree

Certification

Travel Required

Less than 10%

Citizenship

U.S. Citizenship Required