Support customer deployments in classified environments ensuring secure, compliant, and reliable operation of Istari’s digital engineering platform in mission-critical systems.
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
Istari is a digital engineering software company that empowers customers to transform the physical world into digital environments to achieve their specific missions. We are building an open and scalable digital engineering ecosystem, enabling seamless integration of engineering models across various disciplines and organizations. Our platform facilitates prototype design, virtual testing, and AI training, helping clients save time, resources, and reduce environmental impact.
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