Mission-Critical IT Infrastructure Engineer (Classified)

Quindar; Arvada (CO); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Unlimited PTO

15 days off

Full health insurance

401(k) match

Company offsite

Job summary

Quindar is seeking an IT Infrastructure Engineer to own secure, reliable environments supporting U.S. government mission partners. You’ll manage RHEL and Windows Server, Kubernetes, virtualization, storage, backups, and core network services in classified spaces.

You will collaborate with ISSM and engineering teams to implement controls, support accreditation, automate tasks, monitor logs, and maintain documentation for mission operations.

Qualifications

• 5+ years of IT infrastructure administration in an enterprise or government environment.
• Current, active U.S. Government Secret clearance or higher.
• Strong hands-on experience with RHEL, including installation, configuration, patching, troubleshooting, and security hardening.
• Experience administering Windows Server and Kubernetes environments.
• Experience operating virtualized infrastructure, enterprise storage, and backup and recovery systems.
• Experience applying security and compliance requirements in a classified environment.
• Familiarity with RMF processes, NIST controls, and DISA STIGs.
• Working knowledge of networking, identity and access management, monitoring, and incident response.
• Ability to document systems clearly, resolve problems independently, and own infrastructure from deployment through ongoing operations.

Responsibilities

• Deploy, configure, patch, harden, and troubleshoot RHEL and Windows Server systems.
• Build and maintain virtualization, Kubernetes, storage, backup, and recovery systems for mission-critical workloads.
• Manage access controls, monitor system health, review logs, and remediate vulnerabilities.
• Support security assessments, accreditation documentation, remediation plans, and continuous monitoring.
• Automate repeatable administration tasks and improve alerting and operational procedures.
• Diagnose issues across servers, storage, networking, and applications, including occasional scheduled maintenance or after-hours support.

Skills

RHEL administration

Windows Server

Kubernetes

Security compliance

Networking & IAM

Incident response

Documentation

Job description

Quindar is seeking an IT Infrastructure Engineer to own secure, reliable environments supporting U.S. government mission partners. You’ll manage RHEL and Windows Server, Kubernetes, virtualization, storage, backups, and core network services in classified spaces.

You will collaborate with ISSM and engineering teams to implement controls, support accreditation, automate tasks, monitor logs, and maintain documentation for mission operations.