istaridigital.ai - Istari Digital - Sr. Cybersecurity Engineer (ISSE / Product Security Engineering)
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Requirements
• Active TS clearance with SCI eligibility • DoD 8570/8140 certification (Security+ minimum; CISSP/CASP+/CISM preferred) • 5+ years in cybersecurity with hands-on implementation experience • NIST 800-53 / 800-171 • Systems Administration, Network Engineering, or SOC → transitioned into security • Classified environments (SIPR, JWICS, SAP) • ## What Makes You a Strong Fit • You’ve actually hardened systems—not just documented controls • You can move between: • Low-level system configuration • High-level security architecture decisions • You are comfortable doing manual, in-the-weeds work when needed to hit deadlines • Track record of stability (2+ years per role preferred) • Comfortable in a startup environment • Willing to own problems end-to-end, not just your lane
Responsibilities
• Implement NIST 800-53 / 800-171 security controls directly into system design and platform architecture • Lead system hardening and secure configuration across platform components • Embed security into the engineering workflow (DevSecOps) • System Patching • STIG implementation and validation • Vulnerability scanning (ACAS/Nessus) • POA&M management and remediation tracking • Partner with engineering teams to: • Secure APIs, services, and data pipelines • Enforce least privilege, identity, and access controls • Support deployment into: • SIPR / JWICS / SAP environments • Identify and remediate security gaps before they reach customer environments
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