Information System Security Officer (ISSO)

GDIT is seeking a highly skilled and multi-faceted Information System Security Officer (ISSO) for a critical contract role supporting a commercial cloud service provider's mission-critical systems. This position requires the employee to report full time on site in McLean, VA.

Responsibilities

• Support Assessment & Authorization (A&A) execution for classified commercial cloud service offerings, and Cross Domain Solutions (CDS) as needed, through the entire respective FedRAMP/DoW IL6 and/or RMF lifecycles to obtain and maintain the applicable authorizations.
• Assist in maintaining a comprehensive body of evidence for A&A packages.
• Support the monthly and overall FedRAMP/DoW IL6, DoW CDS as needed, and IC Continuous Monitoring requirements.
• Work with security engineering to proactively identify and assess vulnerabilities related to scans, STIGs, security controls, etc.
• Support assessment preparation for security control audits, traditional security reviews, and formal inspections, including preparing for and executing FedRAMP/IL6 third-party assessment organization (3PAO) assessments, DoW CDS assessments as needed, and IC assessments.
• Meticulously review artifacts, logs, and system configurations to ensure they provide sufficient evidence of compliance.
• Coordinate and/or participate in security testing and penetration testing activities to provide an independent validation of the system's security posture.

Skills & Qualifications

• Expert-level knowledge of the complete NIST SP 800 series (especially 800-37, 800-53, 800-30) and risk management principles.
• Progressive experience in information assurance and cybersecurity roles.
• Direct, hands-on experience as an ISSO or ISSM, with a proven track record of successfully supporting ATO for classified systems under IL6, DoW RMF, and/or ICD 503 policies.
• Extensive, hands-on experience navigating the FedRAMP, DoW Impact Level 6 (IL6), and Risk Management Framework (RMF) requirements for classified commercial cloud services and cross domain solutions.

Experience

• 5+ years of related experience.
• Security clearance level: Must possess a current and active TS/SCI with Polygraph.

Why Join Us

• At GDIT, the mission is our purpose, and our people are at the center of everything we do.
• Growth: AI-powered career tool that identifies career steps and learning opportunities.
• Support: An internal mobility team focused on helping you achieve your career goals.
• Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off.
• Community: Award-winning culture of innovation and a military-friendly workplace.

Benefits

• Comprehensive benefits and wellness packages
• 401K with company match
• Competitive pay and paid time off
• Award-winning culture of innovation and a military-friendly workplace