Senior System Administrator

Senior System Administrator (Hybrid) Knoxville, TN

Type: Permanent FTE with full company benefits package

Work Schedule:

• First 6 months: onsite daily
• After ramp-up: hybrid (minimum 2 days per week onsite)

Requirements: Must be able to pass a credit and background check to be considered for this opportunity. Candidates must reside in Knoxville, TN, or the surrounding areas.

Job Summary

We are seeking a Senior System Administrator to support and manage enterprise infrastructure across both on-prem and cloud environments. This role is responsible for administering server systems, maintaining performance and security, and ensuring the reliability of critical IT services.

Key Responsibilities

• Administer and support Windows and Linux-based physical and virtual server environments
• Manage cloud infrastructure, with a focus on Microsoft Azure (IaaS, PaaS, SaaS, serverless)
• Maintain and support virtualization platforms, including Hyper-V and VMware ESXi
• Oversee Microsoft 365 environment, including Exchange Online, Teams, SharePoint, Dynamics, and licensing
• Manage Active Directory and Azure AD, including DNS, DHCP, Group Policy, and certificate services
• Perform daily system monitoring, ensuring availability, performance, and integrity of infrastructure
• Review logs, validate backups, and ensure completion of scheduled jobs (including sFTP processes)
• Provide Tier II/III support for server-related issues and collaborate with desktop support teams
• Troubleshoot and resolve hardware, software, and system-level issues
• Implement and maintain security best practices, including patching, access controls, and data protection
• Partner with security teams to deploy updates and strengthen infrastructure security posture
• Support disaster recovery planning, testing, and documentation
• Assist with capacity planning and forecasting for infrastructure growth
• Maintain documentation for systems, configurations, and processes
• Generate reports on system performance, usage, and capacity trends
• Collaborate with network teams to ensure seamless integration across infrastructure components
• Participate in an on-call/off-hours support rotation

Required Skills & Experience

• Strong experience with:
• Microsoft Azure IaaS
• Windows Server environments
• Microsoft Hyper-V
• VMware ESXi
• Microsoft 365 / Office 365
• Experience managing enterprise server infrastructure in a hybrid environment
• Strong understanding of Active Directory and Azure Active Directory
• Experience with system monitoring, backup/recovery, and performance tuning
• Familiarity with security best practices and patch management
• Microsoft Intune Administration of Workstations
• Experience in capacity planning and infrastructure scaling
• Exposure to automation or scripting (PowerShell preferred)
• Experience working in a collaborative, cross-functional IT environment