IT Systems Administrator

## IT Systems Administrator Apply remote type:
Hybrid locations:
Nashville,Tennessee - USAtime type:
Full time posted on:
Posted Yesterday job requisition :
NX-4165
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* Job Description:

**# Senior Systems Administrator
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* Location:

** Nashville, TN## Position Summary 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 , 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 .
* 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 , DNS, DHCP, Group Policy, and Microsoft 365.
* Experience with VMware and/or Hyper-V virtualization platforms.
* Experience with Power Shell 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.## What Success Looks Like
* Infrastructure services remain secure, reliable, and highly available.
* Manual operational effort is reduced through automation and process improvement.
* Security vulnerabilities and technical debt are proactively addressed.
* Infrastructure projects are delivered successfully and aligned with…