Information System Security Officer (ISSO)

Cybersecurity Architect Sr Principal

We are seeking a highly skilled and multi-faceted Information System Security Officer (ISSO) for a critical contract role supporting this commercial Cloud Service Provider's mission-critical systems. The ideal candidate is a proactive and seasoned professional with extensive, hands-on experience navigating the FedRAMP, DOD Impact Level 6 (IL6), and Risk Management Framework (RMF) requirements for classified commercial cloud services and cross domain solutions. This role requires a unique blend of technical engineering prowess, security assessment and auditing skills, deep expertise in continuous monitoring, and the polish to communicate risk to executive leadership. You will be a key contributor to our Governance, Risk, and Compliance (GRC) program, supporting the Information System Security Manager (ISSM) in ensuring the unyielding security and integrity of mission-critical systems.

The ISSO will be directly responsible for the following key areas:

• RMF & Assessment and Authorization (A&A)
• Documentation Mastery
• Continuous Monitoring & POAM Management
• Compliance & Policy Adherence

2. Security Engineering & System Hardening

• Technical Security Integration
• System Hardening & Configuration
• Vulnerability Management
• Network Security & Architecture Review

3. Security Control Assessor (SCA) & Auditing

• Security Audits & Inspections
• Artifact & Evidence Review
• Penetration Testing & Validation

4. Continuous Monitoring & GRC

• Develop & Manage ConMon Strategy
• Security Data Analysis
• Risk Management
• Incident Response Support

WHAT YOU'LL NEED TO SUCCEED Bring your cyber expertise and drive for innovation to GDIT. The Cybersecurity Architect Sr Principal must have:

Education: BA/BS Degree or equivalent experience in lieu of degree Experience: 10+ years of related experience

Technical skills: Progressive experience in information assurance and cybersecurity roles. A minimum of 5 years of direct, hands-on experience as an ISSO or ISSM, with a proven track record of successfully achieving and maintaining ATO for multiple classified systems under IL6, DoD RMF, and/or ICD 503 policies.

Security clearance level: Must be a U.S. Citizen. Must possess a current and active Top Secret (Sensitive Compartmented Information [SCI] eligibility). Additionally, personnel agree to be submitted for Full-Scope Polygraph (FSP) for potential hands-on, independent activities. However, requirement is Top Secret, and if FSP cannot be adjudicated, personnel will not be impacted and will continue to work on activities where the FSP was never required.

Location: Onsite at the classified operations center in McLean, VA.

Role requirements: Expert-level knowledge of the complete NIST SP 800 series (especially 800-37, 800-53, 800-30) and risk management principles.

Certifications: Must be DoD 8140 / 8570.01-M compliant. A CISSP (Certified Information Systems Security Professional) is strongly preferred and considered the baseline.

Desired:

• Hands-on experience with security and GRC tools such as ACAS (Tenable.sc/Nessus), Splunk, Grafana, ServiceNow, eMASS, and Xacta.
• Deep understanding of network architecture, firewall configurations, and the PPSM process.
• Understanding of Microsoft Active Directory and implementing controls via Group Policy.
• CDS authorization processes and policies of the Intelligence Community (IC), Department of Defense (DoD), and SLED entities.

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 endless opportunities to grow alongside colleagues who share your focus on defending and protecting what matters.

The likely salary range for this position is $157,250 - $212,750. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.

Scheduled Weekly Hours: 40

Travel Required: None

Telecommuting Options: Onsite

Work Location: USA VA McLean

Additional Work Locations:

Total Rewards at GDIT: Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.

We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 30,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology. Join our Talent Community to stay up to date on our career opportunities and events.