Senior Information System Security Engineer
Listed on 2026-08-24
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IT/Tech
Cybersecurity, Systems Engineer, Information Security & Data Protection, Network Security
Job Qualifications
Critical Systems, Security Controls, Security System
Job Description Type ofRequisition
Regular
Clearance Level Must Currently PossessTop Secret/SCI
Clearance Level Must Be Able To ObtainTop Secret SCI + Polygraph
Public Trust/Other RequiredNone
Job FamilyIT Infrastructure and Operations
SkillsJob Qualifications
Critical Systems, Security Controls, Security System
CertificationsNone
Experience8 + years of related experience
US Citizenship RequiredYes
Job Description Senior Information System Security EngineerDeliver security related solutions for enterprise information systems and network architectures as an Information System Security Engineer e, you’ll tailor cutting‑edge solutions to the unique requirements of our clients. With a career in systems security, you’ll ensure information systems, networks and architectures are secure and ready to support mission critical requirements.
At GDIT, people are our differentiator. As an Information System Security Engineer, you will help ensure today is safe and tomorrow is secure. Our work depends on Information Systems Security Engineers joining our team to protect data flows for a wide range of devices.
HOW AN INFORMATION SYSTEM SECURITY ENGINEER WILL MAKE AN IMPACT- Provides technical expertise to ensure systems meet Information Assurance (IA) requirements and are properly accredited.
- Designs, develops, and recommends integrated security system and physical control solutions that will ensure proprietary/confidential data and systems are protected.
- Assist IA team in established Authorization and Accreditation (A&A) process using a risk mitigation framework (RMF) across the design lifecycle for classified systems obtaining and maintaining Interim Authorization to Test (IATT), Authority to Connect (ATC) and Authorization to Operate (ATO).
- Offers technical engineering services for the support of integrated security systems and solutions, managing information‑related risks effectively.
- Works closely with the client during the strategic design process to translate security and business requirements into actionable technical designs.
- Develop comprehensive system test plans (STP) to assess the security posture of the information systems.
- Analyze scan results and security findings to prioritize remediation efforts and implement corrective measures.
- Education:
Bachelor Degree in an area applicable to this position - Required Experience:
8+ years of related experience - Advanced Windows administration capabilities and Linux proficiency
- Practical experience deploying, maintaining, and troubleshooting security tools
- Experience with C2S Cloud, or Dev Ops Sec
- Required Technical
Skills:
Must be 8570 compliant (IAT Level
2) by date of security indoctrination with any necessary certifications. - Security Clearance Level: TS/SCI and Poly
- Experience with:
Assured Compliance Assessment Solution (ACAS), Trellix, Splunk, and Security Technical Implementation Guide (STIG)’s. - Required
Skills and Abilities:
Excellent communication, problem solving, team player - Experience as an ISSO, ISSM, ISSE, or Security Controls Assessor.
- Experience with Special Access Programs (SAPs) and Intelligence Community.
- Location:
On Customer Site - US Citizenship Required
- 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
The likely salary range for this position is $161,500 - $218,500. 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 Hours40
Travel RequiredNone
Telecommuting OptionsOnsite
Work LocationUSA VA Reston
Additional Work Locations Total Rewards At GDITOur 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…
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