istaridigital.ai - Istari Digital - Cybersecurity Engineer – Classified Infrastructure (Customer Success)

• System hardening (Windows/Linux) • Secure network infrastructure (classified environments) • In this role YOU will be the difference between a platform that looks secure on paper, and one that actually works inside real classified mission environments. • Security Clearance: Active TS required with SCI eligibility (Polygraph a plus) • Active TS clearance with SCI eligibilitySecurity+ (required) — CISSP, CISM, or CASP+ preferred • 4+ years of hands-on experience in cybersecurity, system administration, or network engineering • NIST 800-53 / 800-171 • Classified environments (SIPR, JWICS, SAP) • Experience Profile A: System Hardening (System Administration) • Windows and/or Linux systems • Hands-on System Patching, STIG implementation and validation • Experience running scans, remediating findings, and managing POA&Ms • Experience Profile B: Secure Infrastructure (Network Engineering) • Secure network architectures in classified environments • Network segmentation, boundary defense, and secure connectivity • Familiarity with STIGs for network devices and infrastructure • ## What Makes You a Strong Fit • You started in a technical role (SysAdmin, Network, SOC) and moved into security • You’ve done real, hands-on work—not just compliance oversight • You’re comfortable working: • In deploying emerging technology into real-world classified environments • Under time pressure to meet deployment or mission deadlines • You stay long enough to see systems through deployment and accreditation • You’re comfortable in a startup environment—scrappy, fast-moving, and collaborative • You’re willing to do the work needed to get across the finish line, even when it’s manual