Senior Systems Administrator – DoD TS Clearance

Vets Hired; Sierra Vista (AZ); On-site; USD 90,000 - 130,000; Full time

Job summary

Vets Hired is seeking an experienced IT Systems Administrator to support DoD-grade server environments with Windows, Linux/UNIX, and Active Directory. The role involves patching, upgrades, capacity planning, and advanced troubleshooting to ensure system reliability.

The position requires TS clearance, 8+ years in enterprise IT, and IAT Level II certification. You will manage network infrastructure, security controls, incident response, and disaster recovery within a secure environment.

Qualifications

• 8+ years of enterprise IT systems administration experience.
• Active DoD Top Secret Clearance required.
• IAT Level II certification or higher under DoD 8570/8140.
• Experience with Windows Server, Active Directory, Group Policy, and VMware vSphere/ESXi.

Responsibilities

• Administer, maintain, and support Windows, Linux/UNIX, and AD server environments.
• Install, configure, patch, upgrade, and maintain operating systems, apps, and enterprise services.
• Monitor system and network performance; troubleshoot hardware, software, connectivity, and operational issues.
• Provide Tier II/III technical support including workstation deployment and user account administration.
• Manage user accounts, permissions, privileged access, and authentication services.
• Administer network infrastructure including routers, switches, firewalls, and LAN/WAN connectivity.
• Maintain network documentation, configurations, uptime, and health.
• Support cybersecurity operations including RMF requirements, security controls, vulnerability assessments, 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 and government stakeholders to resolve technical issues.
• Support system modernization and lifecycle replacement of technologies.
• Prepare technical briefings, reports, and recommendations for leadership.
• Develop and maintain SOPs and troubleshooting guides.

Skills

Active Directory

Windows Server

Linux/UNIX

VMware vSphere/ESXi

Network infrastructure

Security clearance (TS)

IAT Level II

RMF Security Controls

Tools

VMware vSphere/ESXi

Group Policy

Job description

Vets Hired is seeking an experienced IT Systems Administrator to support DoD-grade server environments with Windows, Linux/UNIX, and Active Directory. The role involves patching, upgrades, capacity planning, and advanced troubleshooting to ensure system reliability.

The position requires TS clearance, 8+ years in enterprise IT, and IAT Level II certification. You will manage network infrastructure, security controls, incident response, and disaster recovery within a secure environment.