Information Systems Security Engineer

Leidos

Confirmed live yesterday High trust

Quick summary

Work type: On-site
Location: Reston, VA
Salary: $87,100–$157,450 / yr
Posted: 21 days ago
Freshness: Confirmed live yesterday
Nearby: 99+ roles within 25 mi

Market check

Salary context

Below market

How this pay compares to similar roles

Similar $162k

This role $122k

$73k most similar roles pay here $216k

This role pays less than 85% of similar roles. Most pay $136,390–$188,475 — the shaded band above. At the midpoint, this role pays about $122k versus about $162k for comparable roles.

Based on 239 similar postings.

Employer

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations.

Leidos currently has 264 open roles on FindRole.

Listed pay typically runs $92,300–$166,850 across 245 roles with salary data.

Most-posted roles

View all roles at Leidos

At a glance

TL;DR · Information Systems Security Engineer

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The Information Systems Security Engineer leads the security architecture, design, and deployment of mission-critical applications across unclassified, classified, and corporate networks. This role involves designing and testing Cross Domain Solutions to facilitate secure data sharing between different environments while managing AWS multi-region and hybrid cloud infrastructures. The engineer is responsible for ensuring compliant application deployments, performing vulnerability management using tools like ACAS, Nessus, and Prisma Cloud, and authoring System Security Plans in eMASS aligned with NIST 800-53 and FedRAMP standards. Technical requirements include expertise in AWS security controls, Windows/Linux administration, Kubernetes, Docker, VMware, Azure virtual desktop, and Citrix. The role addresses the complex challenge of integrating government mission systems with corporate infrastructures while maintaining strict data separation across DTRA and DIA networks to achieve necessary authorizations for high-side and low-side systems.

Skills

AWS Cross Domain Solutions (CDS) RMF NIST 800-53 FedRAMP Kubernetes Docker ACAS Nessus Prisma Cloud STIG VMware Azure Virtual Desktop Citrix Windows Linux IAM VPC eMASS

What you'll do

Design and test Cross Domain Solutions (CDS) to facilitate secure data transfers between unclassified and classified environments.
Engineer and maintain secure application architectures across AWS Commercial, GovCloud, and Secret/Top Secret regions.
Manage security compliance and boundary protection for DTRA, DIA, and corporate infrastructure networks.
Oversee the deployment of applications across high-side and low-side systems to ensure multi-domain compatibility.
Author System Security Plans (SSPs) and manage authorization artifacts within eMASS following NIST 800-53 and FedRAMP standards.
Perform system audits, analyze vulnerability scans, and lead technical teams through STIG remediation processes.
Serve as the primary security liaison with Authorizing Officials to maintain Authority to Operate (ATO) across agencies.

What we're looking for

U.S. Citizenship is required.
Active TS/SCI with polygraph level clearance is required.
A Bachelor's degree or equivalent combination of education and experience is required.
4 to 8 years of prior relevant experience in information systems security is required.
Deep knowledge of AWS cloud security, Windows/Linux administration, and container platforms like Kubernetes and Docker is required.
Experience with Cross Domain Solutions (CDS), multi-level security, and RMF compliance (NIST 800-53, FedRAMP) is required.
Direct experience with DTRA and DIA networks and systems such as VMware, Azure virtual desktop, and Citrix is required.
Active DoD 8570/8140 IAT/IASAE Level III certification (e.g., CISSP, CASP+) or AWS specialty certifications are preferred.

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