Senior Systems Administrator — TS/SCI Cleared, Defense IT

Infinity Systems Engineering

Colorado Springs (CO)

On-site

USD 110,000 - 170,000

Full time

3 days ago

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Benefits offered by this job

Health benefits

401(k) plan

Paid vacation (3 weeks)

Sick leave

Job summary

Infinity is seeking a Senior IT Systems Admin/Engineer in the United States for mission-critical defense systems. The role involves setting up administrator and service accounts, maintaining system documentation, tuning performance, and installing system-wide software.

Candidates should have extensive experience in planning, integration, and lifecycle management of IT infrastructure. The position requires Top Secret SCI clearance at start date, hands-on experience with Windows Server, Linux,

Qualifications

Bachelor's degree or equivalent experience.
20+ years in Systems/Network Administration for mission-critical defense systems.
Top Secret SCI clearance required at start date.
Security+ or equivalent certification required.
Experience with Windows/Linux administration, VMware vSphere, and patch management.
Familiarity with RMF/NIST security frameworks and RBAC.

Responsibilities

Install, configure, and maintain operating systems and system management tools.
Monitor and optimize system performance and availability.
Troubleshoot hardware, software, and networking issues; provide timely solutions.
Implement security measures including firewalls, IDS/IPS, and access controls.
Manage backups (Veritas NetBackup) and disaster recovery testing.
Administer networks (LAN/WAN/VPN), and server deployments.
Provide user support and train staff on IT systems.
Perform regular patching and software updates.