Information Systems Security Engineer (ISSE) - TS/SCI with Polygraph

Type of Requisition:
Regular

Clearance Level Must Currently Possess:
Top Secret SCI + Polygraph

Clearance Level Must Be Able to Obtain:
None

Public Trust/Other Required:
None

Job Family:
Cyber and IT Risk Management

Job Qualifications:

Skills:
Cloud Security, Greenlight Oracle Access Violation Management, Mitigation, Xacta (Platform)
Certifications:
None
Experience:
10 + years of related experience
ship Required:
Yes

Job Description:

A career as an ISSE at GDIT means owning every opportunity to help support and advance our clients' missions. At GDIT, cyber security is embedded into every aspect of what we do and we're constantly evolving our cyber solutions to overcome our clients' biggest challenges.

At GDIT, people are our differentiator. As an ISSE, you will help ensure today is safe and tomorrow is smarter. We are seeking an experienced ISSE capable of working within Xacta, Greenlight, Rapid7 and assigned onsite Information System Security Managers to maintain and renew system security accreditations. Successful candidate must be able to prioritize multiple projects and move applications seamlessly through the accreditation process.

REQUIRED SKILLS:

• Experience with developing and reviewing security concept of operations, systems security plans, security control assessments, contingency plans, configuration management plans, incident response plans, plan of actions and milestones, risk management plans, vulnerability scanning, and/or vulnerability management plans.
• Documented experience with Xacta, GreenLight, and Risk Management Framework (RMF) processes (Rev4 and Rev5)
• Demonstrated on-the-job knowledge and experience cloud security design, requirements analysis, control implementation, and mitigation. Demonstrated experience securing applications in a cloud environment such as Amazon Web Service
• Demonstrated on-the-job knowledge and experience with Assessment and Authorization (A&A) policy and guidance to include ICD-503, FISMA and RMF/A&A processes, NIST SP (including but not limited to 800-27, 800-30, 800-37, 800-53, 800-60, 800-137, 800-144, and 800-145), FIPS (199, 200), CNSSI 1253 technical controls, and developing and maintaining associated certification and accreditation assessment and authorization documentation for systems
• Demonstrated on-the-job knowledge and experience with performing security system scans for network, platform, database, and web services using different security tools (e.g. Nessus Rapid7, Weblnspect, AppDetective)
• Outstanding interpersonal skills and team player
• Outstanding written and verbal communication skills; ability to present reports to management; motivated security expert anxious eager to thoroughly investigate, analyze, and document system issues and resolutions. Includes the ability to work with developers and engineers to determine appropriate mitigations to vulnerabilities
• Demonstrated outstanding ability to produce quality deliverables and to complete assigned projects on time, provide consistent status updates to ensure IT security projects stay focused.
• Demonstrated outstanding attention to detail - completes tasks per standard operating procedures; reports discovered anomalies and inconsistencies
• Demonstrated outstanding persistent and creative problem solver - strong troubleshooting skills and determined to find solutions to technical problems; identifies root cause and presents possible solutions to management
• Demonstrated outstanding work ethic and a proven professional - respectful, dependable, takes initiative

DESIRED SKILLS:

• Certifications: CISSP, CASP
• Experience with cloud security design, requirements analysis, control implementation, and mitigation.
• Experience with JIRA and managing security based requirements
• Project or program management experience.

WHAT YOU'LL NEED TO SUCCEED:

• Education: Bachelor's degree in Computer Science, Engineering, or a related technical discipline, or the equivalent combination of education, technical certifications or training, or work experience.
• Experience: 10+ years
• Clearance Level: TS/SCI + Polygraph
• Location: Herndon, VA
• Hours: Core (9 am - 3pm)
• ship Required

GDIT IS YOUR PLACE:

• 401K with company match
• Comprehensive health and wellness package
• 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

#OpportunityOwned
#GDITCareers
#WeAreGDIT
#JET
#GDITEnhanced2026
#VA_2026Alumni

The likely salary range for this position is $178,500 - $241,500. 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

Telecommuting Options:
Onsite

Work Location:
USA VA Herndon - Customer Proprietary (VAC032)

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
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Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans