Job Description

Senior Systems Administrator

Location: Nashville, TN

We are seeking a Senior Systems Administrator to join our Nashville-based IT Infrastructure team. This role is responsible for the design, administration, security, and operational support of enterprise infrastructure across Windows, Linux, cloud, virtualization, and end-user computing platforms.

The ideal candidate is a well-rounded infrastructure professional who is equally comfortable managing Windows Server environments, troubleshooting Linux systems, automating administrative tasks, supporting cloud services, and partnering with cybersecurity and networking teams to maintain a secure and reliable technology environment.

This position will serve as a senior technical resource and escalation point for complex infrastructure issues while contributing to modernization, automation, and continuous improvement initiatives.

Key Responsibilities

Infrastructure Administration

• Administer and maintain Windows and Linux server environments across on-premises and cloud-hosted infrastructure.
• Manage core infrastructure services including Active Directory, Okta, Entra ID, DNS, DHCP, Group Policy, certificate services, and identity management platforms.
• Support virtualization platforms including VMware and/or Hyper-V.
• Maintain enterprise storage, backup, disaster recovery, and business continuity solutions.
• Monitor system health, performance, availability, and capacity across infrastructure platforms.
• Participate in infrastructure lifecycle management, including system upgrades, migrations, and decommissioning activities.

Cloud & Platform Services

• Support Microsoft 365 services including Exchange Online, Teams, SharePoint Online, and Entra ID.
• Assist with administration of Microsoft Azure, AWS, and other cloud-hosted infrastructure services.
• Support hybrid identity and hybrid infrastructure environments.
• Participate in cloud migration and infrastructure modernization initiatives.

Security & Compliance

• Implement and maintain infrastructure security controls in partnership with Information Security teams.
• Perform vulnerability remediation, patch management, system hardening, and access reviews.
• Support endpoint security, identity security, privileged access management, and logging initiatives.
• Assist with compliance, audit, and governance activities.
• Investigate and resolve infrastructure-related security incidents.

Automation & Operational Excellence

• Create and maintain infrastructure documentation, standards, diagrams, and operating procedures.
• Improve operational efficiency through automation, monitoring, and process optimization.
• Participate in after-hours support and on-call rotations as needed.

Collaboration & Leadership

• Lead infrastructure projects from planning through implementation.
• Mentor junior administrators and technical support personnel.
• Collaborate with networking, security, application, and business teams to deliver technology solutions.
• Work with vendors and service providers to support infrastructure initiatives.

Required Qualifications

• Bachelor's degree in Information Technology, Computer Science, or related field, or equivalent practical experience.
• 7+ years of enterprise systems administration experience.
• Strong experience administering Windows Server environments.
• Working knowledge of Linux administration (Red Hat, Rocky, Ubuntu, or similar distributions).
• Experience managing Active Directory, Entra ID, DNS, DHCP, Group Policy, and Microsoft 365.
• Experience with VMware and/or Hyper-V virtualization platforms.
• Experience with PowerShell and at least one additional scripting language such as Bash or Python.
• Understanding of networking fundamentals including TCP/IP, VPNs, routing, switching, and firewalls.
• Experience with backup and disaster recovery technologies.
• Strong troubleshooting, documentation, and communication skills.

Preferred Qualifications

• Experience administering Microsoft Azure and AWS infrastructure and services.
• Experience with Autopilot and modern endpoint management.
• Familiarity with Linux server administration in production environments.
• Experience with infrastructure-as-code, automation, or configuration management tools.
• Experience supporting enterprise cybersecurity initiatives.
• Knowledge of container technologies such as Docker or Kubernetes.
• Microsoft, VMware, Red Hat, or Azure certifications.
• Experience supporting distributed or global organizations.