Information Systems Security Officer (ISSO)

Type of Requisition:

Pipeline

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:

Classified Networks, Cybersecurity Compliance, DISA STIG, ISSO, RMF

Certifications:

None

Experience:

8 + years of related experience

US Citizenship Required:

Yes

Job Description:

INFORMATION SYSTEMS SECURITY OFFICER

  

YOUR IMPACT 

 Own your opportunity to support national defense. Your work will help keep critical operations secure and connected across the global enterprise—directly, contributing to a mission that protects our nation every day.  

CIS is growing, and we invite both our experienced incumbents and new team members to be part of what’s next. Incumbents bring invaluable mission insight, while new talent adds fresh ideas and energy. Together, we’ll strengthen continuity and drive the next generation of innovation. 

MEANINGFUL WORK AND PERSONAL IMPACT 

As an Information Systems Security Officer (ISSO) supporting enterprise infrastructure services, you will safeguard critical information systems across multiple classified network domains. You will manage the full security lifecycle for assigned systems, ensure continuous compliance with cybersecurity standards, and help maintain resilient and secure mission enabling technologies. Your work strengthens system readiness, reduces risk, and ensures secure operations across globally distributed environments. 

KEY RESPONSIBILITIES 

• Serve as the primary cybersecurity advisor on system security posture, threats, vulnerabilities, and compliance requirements 
• Maintain and update security authorization packages, documentation, and baseline artifacts throughout the system lifecycle 
• Ensure systems retain active Authority to Operate (ATO) through continuous monitoring, updates, and alignment with security policies 
• Develop and manage POA&Ms, risk acceptance requests, waivers, and exceptions for identified vulnerabilities 
• Perform periodic system reviews, update security controls, and coordinate required security-driven configuration changes 
• Audit system logs and monitors outputs to identify compliance issues or abnormal activity and coordinate remediation 
• Oversee secure system recovery, validating restoration of approved security configurations 
• Manage system decommissioning activities, ensuring secure sanitization and proper documentation 
• Collaborate with engineers, system owners, and technical teams to validate controls and support accreditation updates 

WHAT YOU’LL NEED TO SUCCEED 

• Active TS/SCI clearance with CI Polygraph 
• Bachelor’s degree in an IT-related field, or 10+ years of relevant IT experience in lieu of a degree 
• Meet DoD 8140 Information Assurance Workforce certification requirements (e.g. Security+ CE) 
• Hands-on experience performing ISSO functions under the Risk Management Framework (RMF) 
• Strong understanding of NIST SP 80037, 80053, CNSSI 1253, and FISMA-aligned security practices 
• Experience managing authorization package documentation, vulnerability assessments, and STIG compliance 
• Ability to evaluate system risks, track remediation, and coordinate security efforts across engineering and operations teams 
• Familiarity with enterprise security logging tools (e.g., Splunk) and vulnerability monitoring tools 
• Strong communication, documentation, and collaboration skills 
• LOCATION: Onsite

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 an enterprise IT career at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your desire to drive operations forward.

#CIS

The likely salary range for this position is $111,155 - $150,385. 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 MD Annapolis Junction

Additional Work Locations:

USA CO Colorado Springs, USA DC Washington, USA VA Springfield - Customer Proprietary (VAC421)

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

gdit.com/tc.

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans