Istari Digital delivers a model-based digital engineering platform used by defense and aerospace organizations to design and operate mission-critical systems. Our platform is deployed into classified and high-security environments, where cybersecurity is foundational—not optional.
We are hiring a Cybersecurity Engineer to support customer deployments in classified environments, ensuring Istari’s platform operates securely, compliantly, and reliably in real-world mission systems.
This role sits within Customer Success and focuses on hands-on system and infrastructure security—not just documentation or policy.
Depending on your background, you may lean more toward:
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.
Deploy and secure Istari’s platform in:
SIPR, JWICS, and air-gapped environments
Implement and validate:
DISA STIGs
NIST 800-53 / 800-171 controls
Perform hands-on security work, including:
System hardening (Windows & Linux)
Vulnerability scanning (ACAS/Nessus)
STIG validation and remediation
POA&M management
Design, configure, or support secure network architectures, including:
Segmentation, boundary defense, and routing in classified environments
Troubleshoot and resolve:
Security configuration issues
Connectivity and compliance blockers
Work directly with:
Customer security teams (ISSO, ISSM, AO, SCA)
Program and infrastructure teams
Provide feedback to engineering on:
Real-world deployment constraints
Security gaps and improvements
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
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
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
Corsmed
Sysdig
General Motors
BlueCross BlueShield of Tennessee
General Motors Europe
iSTAR Ideas Factory
iSTAR Ideas Factory
iSTAR Ideas Factory