Information Systems Security Manager (ISSM) - TS/SCI w/Polygraph

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Cyber and IT Risk Management Job Qualifications: Skills: RMF, Security Technical Implementation Guides (STIGs), Xacta (Platform) Certifications: None Experience: 4 + years of related experience US Citizenship Required: Yes Job Description: Seize your opportunity to make a personal impact as an Information Systems Security Manager (ISSM) supporting customer activities. GDIT is your place to make meaningful contributions to challenging projects and grow a rewarding career. At GDIT, people are our differentiator. As an ISSM, you will help ensure today is safe and tomorrow is smarter. Our work depends on an ISSM joining our highly skilled team to be a premier provider of cyber security services to the customer. We provide consummate cyber security risk management “as a service” platform across multiple fabrics and centers. We have responsibility to ensure operational IT capabilities provide the client with necessary timeliness, accuracy and security of information demanded from all our highly professional roles. Be the change, lead our change – join us! HOW AN ISSM WILL MAKE AN IMPACT 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 ServiceNow 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 WHAT YOU’LL NEED TO SUCCEED: Education : Bachelors ( Computer engineering, Computer Science, Electrical Engineering, Information systems, Information Technology, Cybersecurity, or a closely related discipline ) Required Certification: Security+ Required Experience : 4+ yrs Required Technical Skills: Demonstrated experience with RMF, ICD 503, CNSSI 1253, NIST SP 800-53/53A, and STIGs Experience with ServiceNow, Tenable, and other SCAP Compliant tools Require strong documentation skills to create and update policies, process documentation and procedures Security Clearance Level : TS/SCI with active polygraph 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 Location : McLean, VA - On Customer Site 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 #WeAreGDIT #JET #GDITEnhanced2026 #VA_2026Alumni The likely salary range for this position is $123,250 - $166,750. 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: Less than 10% T elecommuting Options: Onsite Work Location: USA VA McLean - Customer Proprietary (VAC393) 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. Our Identity Verification Process: As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes. About Our Work: We are GDIT. A global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 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 mission-ready capabilities in AI, cloud, cyber and software development. Join our Talent Community to stay up to date on our career opportunities and events at . Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans