Systems Administrator (Senior-Level)

Job Summary

• Administer, maintain, and support physical and virtual Windows, Linux/UNIX, and Active Directory server environments.
• Install, configure, patch, upgrade, and maintain operating systems, applications, and enterprise services.
• Monitor system and network performance and troubleshoot hardware, software, connectivity, and operational issues.
• Provide Tier II/III technical support, including workstation deployment, peripheral support, user account administration, and technical training.
• Manage user accounts, permissions, privileged access, and authentication services.
• Administer network infrastructure including routers, switches, firewalls, encryptors, LAN/WAN connectivity, and copper/fiber cabling systems.
• Maintain network documentation, configurations, port assignments, uptime, traffic, and network health.
• Support cybersecurity operations, including RMF requirements, security controls, vulnerability assessments, continuous monitoring, and ATO compliance.
• Respond to cybersecurity incidents, malware infections, and classified spillage events.
• Perform backup, recovery, contingency, and disaster recovery procedures.
• Coordinate with vendors, government stakeholders, and support organizations to resolve technical issues.
• Support system modernization, technology evaluations, lifecycle replacement, testing, and implementation of new technologies.
• Prepare technical briefings, reports, recommendations, and analysis for leadership and stakeholders.
• Develop and maintain SOPs, configuration records, troubleshooting guides, and technical documentation.
• Identify process improvements, automation opportunities, and operational efficiencies.

Qualifications

• Active DoD Top Secret Clearance required.
• 8+ years of enterprise IT systems administration experience.
• Experience with Windows/Linux servers, virtualization, Active Directory, and network infrastructure.
• IAT Level II certification or higher under DoD 8570/8140.
• Experience with Microsoft Windows Server, Active Directory, Group Policy, and VMware vSphere/ESXi.
• Knowledge of enterprise network management, monitoring, and troubleshooting.
• Ability to install, configure, maintain, and troubleshoot network, server, and communications technologies.

Sierra Vista, Arizona, United States

2026 Sept 10th IT/CYber - Link Solutions