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Job Description: Senior Systems Administrator

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 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.

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 business objectives.

The administrator serves as a trusted technical advisor across IT and business teams.

Nextpower

At Nextpower, we are driving the global energy transition with an integrated clean energy technology platform that combines intelligent structural, electrical, and digital solutions for utility-scale power plants. Our comprehensive portfolio enables faster project delivery, higher performance, and greater reliability, helping our customers capture the full value of solar power. Our talented worldwide teams are redefining how solar power plants are designed, built, and operated every day with smart technology, data-driven insights, and advanced automation. Together, we're building the foundation for the world’s next generation of clean energy infrastructure.

Nextpower is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

We are Nextpower At Nextpower, we are driving the global energy transition with an integrated clean energy technology platform that combines intelligent structural, electrical, and digital solutions for utility-scale power plants. Our comprehensive portfolio enables faster project delivery, higher performance, and greater reliability, helping our customers capture the full value of solar power. Our talented worldwide teams are redefining how solar power plants are designed, built, and operated every day with smart technology, data-driven insights, and advanced automation. Together, we're building the foundation for the world’s next generation of clean energy infrastructure.