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Empowering our physical world with a digital one
Cybersecurity Engineer – Classified Infrastructure
Location
United States
Posted
86 days ago
Salary
$116K - $174K / year
Seniority
Senior
Job Description
Cybersecurity Engineer – Classified Infrastructure
Istari
• Deploy and secure Istari’s platform in SIPR, JWICS, and air-gapped environments • Implement and validate DISA STIGs • Implement and validate NIST 800-53 / 800-171 controls • Perform hands-on security work, including System hardening (Windows & Linux) • Conduct Vulnerability scanning (ACAS/Nessus) • Perform STIG validation and remediation • Manage POA&M • Design, configure, or support secure network architectures, including segmentation, boundary defense, and routing in classified environments • Troubleshoot and resolve security configuration issues • Address connectivity and compliance blockers • Work directly with customer security teams (ISSO, ISSM, AO, SCA) • Collaborate with program and infrastructure teams • Provide feedback to engineering on real-world deployment constraints and security improvements
Job Requirements
- Active TS clearance with SCI eligibility
- Security+ (required) — CISSP, CISM, or CASP+ preferred
- 4+ years of hands-on experience in cybersecurity, system administration, or network engineering
- Direct experience with NIST 800-53 / 800-171
- Direct experience with DISA STIGs
- Experience operating in Classified environments (SIPR, JWICS, SAP)
- Strong experience securing Windows and/or Linux systems
- Hands-on System Patching, STIG implementation and validation
- Experience running scans, remediating findings, and managing POA&Ms
- Experience designing or supporting Secure network architectures in classified environments
- Knowledge of Network segmentation, boundary defense, and secure connectivity
- Familiarity with STIGs for network devices and infrastructure
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