Information System Security Officer; ISSO
Listed on 2026-02-16
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IT/Tech
Cybersecurity, Information Security
Overview
GDIT is seeking an Information System Security Officer (ISSO) for a critical contract role supporting a commercial cloud service provider's mission-critical systems. This position requires full-time on-site work in McLean, VA.
The ideal candidate is a proactive and seasoned professional with extensive, hands-on experience navigating FedRAMP, DoW IL6, and RMF requirements for classified commercial cloud services and cross-domain solutions. This role requires technical engineering prowess, security assessment and auditing skills, deep expertise in continuous monitoring, and the ability to communicate risk to executive leadership. The ISSO will contribute to our Governance, Risk, and Compliance (GRC) program, supporting the Information System Security Manager (ISSM) and ISSO Lead to ensure the security and integrity of mission-critical systems.
The ISSO will support the following key areas:
- RMF & Assessment and Authorization (A&A)
- Security Engineering & System Hardening
- Security Control Assessor (SCA) & Auditing
- Continuous Monitoring & GRC
Additionally, the ISSO will:
- Support A&A execution for classified commercial cloud service offerings and Cross Domain Solutions (CDS) across the FedRAMP/DoW IL6 and RMF life cycles to obtain and maintain applicable authorizations.
- Assist in maintaining a comprehensive body of evidence for A&A packages.
- Support monthly and overall FedRAMP/DoW IL6, DoW CDS, and IC Continuous Monitoring requirements.
- Work with security engineering to identify and assess vulnerabilities related to scans, STIGs, controls, etc.
- Support assessment preparation for security control audits, traditional security reviews, and formal inspections, including preparing for FedRAMP/IL6 3PA
O assessments, DoW CDS assessments, and IC assessments. Potential to support DCSA classified space assessments. - Meticulously review artifacts, logs, and configurations to ensure evidence of compliance.
- Coordinate and participate in security testing and penetration testing to validate the system s security posture.
WHAT YOU’LL NEED TO SUCCEED
- REQUIRED:
The ISSO must have:
- Security clearance level: Current and active Top Secret clearance (polygraph submission may be requested).
- Certifications: DoW 8140 / 8570.01-M compliant
- Education: BA/BS Degree or equivalent experience
- Experience: 5+ years of related experience
- Technical skills: Expert knowledge of the NIST SP 800 series (800-37, 800-53, 800-30) and risk management principles; progressive information assurance and cybersecurity roles; direct hands-on ISSO/ISSM experience with ATO for IL6/DoW RMF and ICD 503; extensive FedRAMP/IL6 and CDS experience; onsite in McLean, VA
DESIRED
QUALIFICATIONS:
- Certifications: CISSP (Certified Information Systems Security Professional)
GDIT IS YOUR PLACE
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
OWN YOUR OPPORTUNITY
Explore a career in cyber at GDIT and you’ll find opportunities to grow alongside colleagues focused on defending and protecting what matters.
Salary and Benefits Information
The likely salary range for this position is $124,093 - $166,750. This is not a guarantee of compensation or salary; actual salary will be based on experience, location, and contractual requirements and could fall outside of this range.
View information about benefits and our total rewards program.
About Our Work
We are GDIT, a global technology and professional services company delivering technology and mission services to major government agencies across the U.S. Our 30,000 experts apply technology to create value and deliver solutions at the edge of innovation, operating across 50+ countries with capabilities in digital modernization, AI/ML, cloud, cyber, and application development.
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Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans
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