Senior Systems Administrator

Overview

Manage Windows and Linux server infrastructure for multiple client environments. Lead Tier 3 escalation point.

Responsibilities

• Administer Windows Server 2019/2022 and RHEL/Ubuntu environments
• Manage Active Directory, Group Policy, DNS, DHCP, certificate services
• Lead Tier 3 escalations and complex troubleshooting
• Implement backup and disaster recovery procedures
• Security hardening per STIG and CIS benchmarks
• Automate with PowerShell, Bash, and Ansible
• Maintain system documentation and runbooks
• Participate in on-call rotation

Requirements

• 5+ years systems administration
• Active Secret clearance (or ability to obtain)
• Strong AD and Group Policy experience
• VMware vSphere or Hyper-V
• STIG compliance experience
• CompTIA Security+

Preferred Qualifications

• Government/defense contractor experience
• MCSA, RHCSA certifications
• SCCM/MECM or Intune experience
• CMMC 2.0 familiarity