Information Systems Security Officer (ISSO) - TS/SCI with Polygraph

Company: GD Information Technology
Location: Elkridge
Posted on: April 4, 2026

Job Description:

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret/SCI 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: Computer Security, Information Systems, Information System Security Certifications: None Experience: 5 years of related experience US Citizenship Required: Yes Job Description: *Position is currently located in Elkridge, MD and will relocate to another site in the National Capital Region in 2026.* As an Information System Security Officer (ISSO) at GDIT, you'll be a key part of a focused team dedicated to securing our nation’s most critical systems. We need a detail-oriented professional with a strong technical background who can not only manage security policies but also get hands-on with the systems themselves. You'll be the one translating complex security requirements into real-world solutions and ensuring our infrastructure is both compliant and resilient. If you're ready to make a tangible impact by applying your skills to a mission-critical environment, this is the role for you. HOW AN INFORMATION SYSTEM SECURITY OFFICER WILL MAKE AN IMPACT Serve as a principal advisor on all matters, technical and otherwise, involving the security of Information Technology Division information systems. Implement Risk Management Framework (RMF) in accordance with NIST SP 800-37. E nsure all security controls are robust and effective by independently conducting security control assessments, gathering comprehensive evidence, and ensuring systems are compliant with all standards. You'll take ownership of the security package, ensuring all NIST SP 800-53 controls are applied. Independently identify security vulnerabilities and propose alternative solutions that still achieve the required security intent, ensuring all NIST SP 800-53. Directly assess system configurations and ensure compliance with security baselines like Security Technical Implementation Guides (STIGs). Create, edit, and maintain a wide range of security documentation from scratch, including System Security Plans (SSPs), and Plans of Actions and Milestones (POA&Ms). Collaborate directly with engineering and development teams to implement your security designs and troubleshoot complex issues . Apply specific functional, working and general industry knowledge. Develop or contribute to solutions to a variety of problems of moderate scope and complexity. Work independently with some guidance. May review or guide activities of more junior employees. Provide leadership briefs, reports, and supporting documentation regarding the status of applicable systems and their progression through the client’s RMF process. Ensure all network, system, application, or service users have the requisite security clearances, authorization, need-to-know, and security responsibility awareness prior to granting access to ITD information systems. Research and remediate security vulnerability findings for applicable systems within the ITD as documented in the Security Assessment Report (SAR) and its Plan of Actions and Milestones (POA&M). Plan, implement, upgrade and monitor security measures for the protection of computer networks and information. Ensure appropriate security controls are in place that safeguard digital files and vital electronic infrastructure. Oversee and support assigned IT environments, ensuring continuous improvement and rapid problem resolution. WHAT YOU’LL NEED TO SUCCEED: Required Education and Experience: Technical Training, Certification(s ) or Degree 8 years Certification: 8570.01-M at the Information Assurance Technical (IAT) Level II Security Clearance Level: TS/SCI clearance and ability to obtain and maintain a CI Polygraph Required Skills: S trong writ ten and verbal communication , strong analytical, and critical thinking skills Location: On Customer Site 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 MD_2026Alumn GDITEnhanced2026 The likely salary range for this position is $127,500 - $172,500. 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 T elecommuting Options: Onsite Work Location: USA MD Elkridge Additional Work Locations: USA DC Washington 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 at gdit.com/tc . Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

Keywords: GD Information Technology, Baltimore , Information Systems Security Officer (ISSO) - TS/SCI with Polygraph, IT / Software / Systems , Elkridge, Maryland